Front mount intercooler for my Reservoir. Sign me up Toretto.
I think you just figured it all out! Those buttons on Loic's bike spray water against the shock to cool it down, just like the intercooler sprayer on an old WRX STI. Brilliant!
I ran those tests about 5 years ago, it just took a while to get round to writing them up. It was mostly comparing different oils to see how much affect they had but overall the changes were pretty minor. I've found on the trail that shocks heat up pretty rapidly to around 20*c (even bouncing around the carpark will warm it up alot) and then starts to taper off and typically reach an equilibrium between 30 and 40 degrees. Through that range the different in damping is negligible. There might be some cases where the rate of heating exceeds the cooling from air flow but that would be pretty extreme, ie several minutes of massive repeated boulders at high speed! Changes in air spring are much greater so more likely what people feel during a run, or maybe the increase in IFP pressure for some shocks (and yes my tests were normalise to remove gas pressure across the range)
Typically the highest amount of energy comes from higher bike speeds so the cooling is automatically increased and the issue self-corrects for the most part
An aluminium shock body will feel crazy hot at only 50 degrees so even the most extreme shock temps people see aren't really that hot. Much hotter than that would become an actual burn hazard for people too! I still want to do some more trail tests (rate of heating could be an interesting metric for how a bike is set up too..) but I think there is actually a pretty safe margin and enough headroom that overheating isn't a major issue. Even Scott bikes have a cooling duct for the internal shocks which seems to channel enough air to keep it under control, especially when all the air through the hole will get directed straight on to the shock. Still a terrible idea for other reasons but heat isn't one of them!
Thanks! But do you really consider a 15% change in force for 20 degree change in temperature neglegible? Seems like quite a lot to me. Of...
Thanks! But do you really consider a 15% change in force for 20 degree change in temperature neglegible? Seems like quite a lot to me. Of course this is not true for all oils.
Do you mean the WPL 10wt oil? I commented on that one -
"The WPL oil had a much larger variance, which would almost definitely be noticed and is also the only one to have an appreciable difference on the compression side."
It's also not an oil many people would use for shocks so was only in there as a reference
Hmm has anyone ever done a proper test/analysis of shock performance to temperature change?As the biggest suspension geek I can think of @TheSuspensionLabNZ have you ever...
Hmm has anyone ever done a proper test/analysis of shock performance to temperature change? As the biggest suspension geek I can think of @TheSuspensionLabNZ have you ever run across any detailed tests rather than just the usual online forum subjective reckons?
I ran those tests about 5 years ago, it just took a while to get round to writing them up. It was mostly comparing different oils to see how much affect they had but overall the changes were pretty minor. I've found on the trail that shocks heat up pretty rapidly to around 20*c (even bouncing around the carpark will warm it up alot) and then starts to taper off and typically reach an equilibrium between 30 and 40 degrees. Through that range the different in damping is negligible. There might be some cases where the rate of heating exceeds the cooling from air flow but that would be pretty extreme, ie several minutes of massive repeated boulders at high speed! Changes in air spring are much greater so more likely what people feel during a run, or maybe the increase in IFP pressure for some shocks (and yes my tests were normalise to remove gas pressure across the range)
Typically the highest amount of energy comes from higher bike speeds so the cooling is automatically increased and the issue self-corrects for the most part
An aluminium shock body will feel crazy hot at only 50 degrees so even the most extreme shock temps people see aren't really that hot. Much hotter than that would become an actual burn hazard for people too! I still want to do some more trail tests (rate of heating could be an interesting metric for how a bike is set up too..) but I think there is actually a pretty safe margin and enough headroom that overheating isn't a major issue. Even Scott bikes have a cooling duct for the internal shocks which seems to channel enough air to keep it under control, especially when all the air through the hole will get directed straight on to the shock. Still a terrible idea for other reasons but heat isn't one of them!
Um... "-Also, if you drive to the trail with your bike on the outside of the car, the wind chill will reduce its temperature even further!"Windchill is...
Um...
"-Also, if you drive to the trail with your bike on the outside of the car, the wind chill will reduce its temperature even further!"
Windchill is a factor for humans (or warm blooded beings) or anything above the ambient temperwture as the moving air cools better than stagnant air. The bike at 10 Celsius outside will equalize to 10 degrees being stationary or at 130 kph on the roof of the car.
That was possibly worded badly, its been a while but I think it was supposed to mean that if you check your shock pressure in the garage on a day with an outside temp around 0 degrees C, it will be cold but still (depending on your house) around 10-15 degrees inside whereas if you drive to the trail and then check your shock it will be pretty damn close to 0 degrees at the point you take it off the rack. If you don't carry it on the outside of the car that "garage" temp is probably the lowest point it will be at that day.
I know I'm late to the Scott Gambler shock heat discussion, and I know our resident experts have said shock heat isn't a big factor on...
I know I'm late to the Scott Gambler shock heat discussion, and I know our resident experts have said shock heat isn't a big factor on performance, but... what if they put the shock inside and then decide to put part of the shock outside
I'm honestly surprised remote reservoirs haven't come back in to fashion lately! Water cooling channels in the damper bridge and an external radiator would be the way to go IMO
Also sorry I don't know how to respond to multiple comments in one post
re: temperatures...i've touched the shock bolt head on the outside of the frame on jonny's bike 5 minutes after a run at mtn creek (which isn't super long) and it was too hot to keep a finger on. does that matter for shock internals? no idea.
whooooooooos Jonny? And what kind of bike is it? Got me kind of curious, an alloy bolt would transfer a lot of heat and feels pretty unbearable at around 60*C but also friction in the bushing would generate its own heat too!
I think you just figured it all out! Those buttons on Loic's bike spray water against the shock to cool it down, just like the intercooler...
I think you just figured it all out! Those buttons on Loic's bike spray water against the shock to cool it down, just like the intercooler sprayer on an old WRX STI. Brilliant!
I ran those tests about 5 years ago, it just took a while to get round to writing them up. It was mostly comparing different oils to see how much affect they had but overall the changes were pretty minor. I've found on the trail that shocks heat up pretty rapidly to around 20*c (even bouncing around the carpark will warm it up alot) and then starts to taper off and typically reach an equilibrium between 30 and 40 degrees. Through that range the different in damping is negligible. There might be some cases where the rate of heating exceeds the cooling from air flow but that would be pretty extreme, ie several minutes of massive repeated boulders at high speed! Changes in air spring are much greater so more likely what people feel during a run, or maybe the increase in IFP pressure for some shocks (and yes my tests were normalise to remove gas pressure across the range)
Typically the highest amount of energy comes from higher bike speeds so the cooling is automatically increased and the issue self-corrects for the most part
An aluminium shock body will feel crazy hot at only 50 degrees so even the most extreme shock temps people see aren't really that hot. Much hotter than that would become an actual burn hazard for people too! I still want to do some more trail tests (rate of heating could be an interesting metric for how a bike is set up too..) but I think there is actually a pretty safe margin and enough headroom that overheating isn't a major issue. Even Scott bikes have a cooling duct for the internal shocks which seems to channel enough air to keep it under control, especially when all the air through the hole will get directed straight on to the shock. Still a terrible idea for other reasons but heat isn't one of them!
Um... "-Also, if you drive to the trail with your bike on the outside of the car, the wind chill will reduce its temperature even further!"Windchill is...
Um...
"-Also, if you drive to the trail with your bike on the outside of the car, the wind chill will reduce its temperature even further!"
Windchill is a factor for humans (or warm blooded beings) or anything above the ambient temperwture as the moving air cools better than stagnant air. The bike at 10 Celsius outside will equalize to 10 degrees being stationary or at 130 kph on the roof of the car.
That was possibly worded badly, its been a while but I think it was supposed to mean that if you check your shock pressure in the...
That was possibly worded badly, its been a while but I think it was supposed to mean that if you check your shock pressure in the garage on a day with an outside temp around 0 degrees C, it will be cold but still (depending on your house) around 10-15 degrees inside whereas if you drive to the trail and then check your shock it will be pretty damn close to 0 degrees at the point you take it off the rack. If you don't carry it on the outside of the car that "garage" temp is probably the lowest point it will be at that day.
That is true, but just leaving it outside for 15 minutes should bring it very close to the outside temp too.
BTW it's not possible to quote multiple posts in one post...
Was just reading Escape Collective's article about security researchers hacking a Shimano Di2 drivetrain (tl;dr it's possible but highly unlikely in any real-world scenario) and this quote about wireless drivetrains jumped out at me:
"Wireless shifting has also made aspects like installation simple and easy to do. In fact, that’s the primary reason we have it, said Wakeham. He pointed out that riders aren’t the main customer for big component brands like SRAM and, especially, Shimano; bike brands like Specialized and Trek are. For the rider, 'wireless isn’t innovation for the user except in aesthetics,' he said, because shifting is slower than full-wired systems and of course the system is less secure. But wireless shifting solves a bothersome problem for bike brands: assembly. As Wakeham put it, 'it means complex internal wire routing can be avoided in factories.'" (https://escapecollective.com/heres-the-real-lesson-from-that-wireless-shifting-hack/)
Don't think I've heard this specific explanation before. Is it plausible that shaving down assembly time/cost is really a major driver for the proliferation of wireless drivetrains?
Was just reading Escape Collective's article about security researchers hacking a Shimano Di2 drivetrain (tl;dr it's possible but highly unlikely in any real-world scenario) and this...
Was just reading Escape Collective's article about security researchers hacking a Shimano Di2 drivetrain (tl;dr it's possible but highly unlikely in any real-world scenario) and this quote about wireless drivetrains jumped out at me:
"Wireless shifting has also made aspects like installation simple and easy to do. In fact, that’s the primary reason we have it, said Wakeham. He pointed out that riders aren’t the main customer for big component brands like SRAM and, especially, Shimano; bike brands like Specialized and Trek are. For the rider, 'wireless isn’t innovation for the user except in aesthetics,' he said, because shifting is slower than full-wired systems and of course the system is less secure. But wireless shifting solves a bothersome problem for bike brands: assembly. As Wakeham put it, 'it means complex internal wire routing can be avoided in factories.'" (https://escapecollective.com/heres-the-real-lesson-from-that-wireless-shifting-hack/)
Don't think I've heard this specific explanation before. Is it plausible that shaving down assembly time/cost is really a major driver for the proliferation of wireless drivetrains?
Yes.
It's hard to see as currently they're more expensive, but the price will come down in real terms each generation whereas labour cost in general, stays constant or increases in real terms.
Its why straight pull hubs exist, its why a lot of things in the automotive world are the way they are, so robots can do the assembly.
Would I say its on the only reason, no definitely not. A big driver in the performance bike world is aerodynamics for road bikes, and because of the UCI weight limit has been hit for over a decade now, road bikes essentially have weight to spare they can use on things like no cables etc. Because they developed it for road bikes, they'll pass it onto mountain and commuter bikes next.
Was just reading Escape Collective's article about security researchers hacking a Shimano Di2 drivetrain (tl;dr it's possible but highly unlikely in any real-world scenario) and this...
Was just reading Escape Collective's article about security researchers hacking a Shimano Di2 drivetrain (tl;dr it's possible but highly unlikely in any real-world scenario) and this quote about wireless drivetrains jumped out at me:
"Wireless shifting has also made aspects like installation simple and easy to do. In fact, that’s the primary reason we have it, said Wakeham. He pointed out that riders aren’t the main customer for big component brands like SRAM and, especially, Shimano; bike brands like Specialized and Trek are. For the rider, 'wireless isn’t innovation for the user except in aesthetics,' he said, because shifting is slower than full-wired systems and of course the system is less secure. But wireless shifting solves a bothersome problem for bike brands: assembly. As Wakeham put it, 'it means complex internal wire routing can be avoided in factories.'" (https://escapecollective.com/heres-the-real-lesson-from-that-wireless-shifting-hack/)
Don't think I've heard this specific explanation before. Is it plausible that shaving down assembly time/cost is really a major driver for the proliferation of wireless drivetrains?
Definitely sounds possible. Looking at specialized and santa cruz doing away with cable routing for a derailleur on some bikes leads to not only less assemble time and cost but less manufacturing cost by cutting out tube in tube routing. Makes the frame a bit cheaper to make but the bikes arnt any cheaper. Probably increases profit margin a little bit as well.
Nothing about a dedicated cc frame or the new stumpy says “hey we’re trying to save a couple dollars on manufacturing”.
It’s an aesthetic choice on a very expensive model. Personally I think it would be especially cool if you run external rear brake (my preference practically too) leaving no need for internal routing or a stupid headset. Clean head tube, cleaner bars, easier setup and maintenance. I don’t think charging a battery is a big ask in today’s world.
I hear 2025 is a shimano release year. So hopefully electronic deore by 2026. But we will see I suppose. Until something cheaper comes out I’ll just use zip ties partly out of spite.
Doing away with cable ports will also make the frame inherently stronger, as you will have less holes, and therefore lighter as they do not need to reinforce those places. Marginally, yes. I also think this is why many are using headset routed cables.
I know I'm late to the Scott Gambler shock heat discussion, and I know our resident experts have said shock heat isn't a big factor on...
I know I'm late to the Scott Gambler shock heat discussion, and I know our resident experts have said shock heat isn't a big factor on performance, but... what if they put the shock inside and then decide to put part of the shock outside
I can hear whinings about proprietary shocks already...
Nothing about a dedicated cc frame or the new stumpy says “hey we’re trying to save a couple dollars on manufacturing”.It’s an aesthetic choice on a...
Nothing about a dedicated cc frame or the new stumpy says “hey we’re trying to save a couple dollars on manufacturing”.
It’s an aesthetic choice on a very expensive model. Personally I think it would be especially cool if you run external rear brake (my preference practically too) leaving no need for internal routing or a stupid headset. Clean head tube, cleaner bars, easier setup and maintenance. I don’t think charging a battery is a big ask in today’s world.
I hear 2025 is a shimano release year. So hopefully electronic deore by 2026. But we will see I suppose. Until something cheaper comes out I’ll just use zip ties partly out of spite.
I watched the loam wolf review of the bronson. They had a guy from santa cruz there. He said a big part of them ditching the internal routing was to save some weight and set the cc frame apart from the c. I think he said it saved around 300g
Nothing about a dedicated cc frame or the new stumpy says “hey we’re trying to save a couple dollars on manufacturing”.It’s an aesthetic choice on a...
Nothing about a dedicated cc frame or the new stumpy says “hey we’re trying to save a couple dollars on manufacturing”.
It’s an aesthetic choice on a very expensive model. Personally I think it would be especially cool if you run external rear brake (my preference practically too) leaving no need for internal routing or a stupid headset. Clean head tube, cleaner bars, easier setup and maintenance. I don’t think charging a battery is a big ask in today’s world.
I hear 2025 is a shimano release year. So hopefully electronic deore by 2026. But we will see I suppose. Until something cheaper comes out I’ll just use zip ties partly out of spite.
I watched the loam wolf review of the bronson. They had a guy from santa cruz there. He said a big part of them ditching the...
I watched the loam wolf review of the bronson. They had a guy from santa cruz there. He said a big part of them ditching the internal routing was to save some weight and set the cc frame apart from the c. I think he said it saved around 300g
he said 100. which is quickly reg gained right where it matters, at your rear axle with those bricks, hem, sorry, transmission deralieurs
he said 100. which is quickly reg gained right where it matters, at your rear axle with those bricks, hem, sorry, transmission deralieurs
are the downvotes based on? cause i'm talking facts here, oh let's remember the 28gr for a udh, so at the axle, Gx vs GX t-type you have ( cassette + deralieur ) 738gr vs 936gr, so 200gr of extra unsprung weight, on a total of 219gr more for t- type, now on XO is 370gr, so the huge (100gr) weight saving on the frame are not only gone but gone right at your rear axle, nice
are the downvotes based on? cause i'm talking facts here, oh let's remember the 28gr for a udh, so at the axle, Gx vs GX t-type...
are the downvotes based on? cause i'm talking facts here, oh let's remember the 28gr for a udh, so at the axle, Gx vs GX t-type you have ( cassette + deralieur ) 738gr vs 936gr, so 200gr of extra unsprung weight, on a total of 219gr more for t- type, now on XO is 370gr, so the huge (100gr) weight saving on the frame are not only gone but gone right at your rear axle, nice
I know I'm late to the Scott Gambler shock heat discussion, and I know our resident experts have said shock heat isn't a big factor on...
I know I'm late to the Scott Gambler shock heat discussion, and I know our resident experts have said shock heat isn't a big factor on performance, but... what if they put the shock inside and then decide to put part of the shock outside
I can see them being attracted to this solution because it seems like one of the few ways left to up the ante: run the hose connecting the shock and reservoir through a port in the downtube.
are the downvotes based on? cause i'm talking facts here, oh let's remember the 28gr for a udh, so at the axle, Gx vs GX t-type...
are the downvotes based on? cause i'm talking facts here, oh let's remember the 28gr for a udh, so at the axle, Gx vs GX t-type you have ( cassette + deralieur ) 738gr vs 936gr, so 200gr of extra unsprung weight, on a total of 219gr more for t- type, now on XO is 370gr, so the huge (100gr) weight saving on the frame are not only gone but gone right at your rear axle, nice
I prefer climbing with an 11 speed, even when I travel to CO to ride bigger stuff than what we have locally, as it prevents me from dropping in to a too low gear.
Especially with the MX rear tire being smaller and providing some gearing advantage. Also, the extra ground clearance of the shorter derailleur combined with the MX rear wheel is appreciated.
The weight savings off of the rear wheel (cassette & derailleur) is a solid 300 grams (2/3#s) which I'm convinced is enough that I can tell a difference in suspension performance, but maybe it's just in my head.
Sure, looks better too! Also, it's an all steel cassette which is great for longevity.
All in with Eewing cranks I'm sitting at less than 1400 grams for my entire drivetrain.
Can’t copy text from the insta post from mobile, but “Suspension Tech International”, apparently a high end suspension tuning shop for moto and MTB in NZ, seems to be making their own shock now. Enduro coil.
Can’t copy text from the insta post from mobile, but “Suspension Tech International”, apparently a high end suspension tuning shop for moto and MTB in NZ, seems to be making their own shock now. Enduro coil.
There was article about it quite some time ago on pinkbike I think, it's been long time coming.
Can’t copy text from the insta post from mobile, but “Suspension Tech International”, apparently a high end suspension tuning shop for moto and MTB in NZ, seems to be making their own shock now. Enduro coil.
Front mount intercooler for my Reservoir. Sign me up Toretto.
I think you just figured it all out! Those buttons on Loic's bike spray water against the shock to cool it down, just like the intercooler sprayer on an old WRX STI. Brilliant!
Do you mean the WPL 10wt oil? I commented on that one -
"The WPL oil had a much larger variance, which would almost definitely be noticed and is also the only one to have an appreciable difference on the compression side."
It's also not an oil many people would use for shocks so was only in there as a reference
That was possibly worded badly, its been a while but I think it was supposed to mean that if you check your shock pressure in the garage on a day with an outside temp around 0 degrees C, it will be cold but still (depending on your house) around 10-15 degrees inside whereas if you drive to the trail and then check your shock it will be pretty damn close to 0 degrees at the point you take it off the rack. If you don't carry it on the outside of the car that "garage" temp is probably the lowest point it will be at that day.
I'm honestly surprised remote reservoirs haven't come back in to fashion lately! Water cooling channels in the damper bridge and an external radiator would be the way to go IMO
Also sorry I don't know how to respond to multiple comments in one post
whooooooooos Jonny? And what kind of bike is it? Got me kind of curious, an alloy bolt would transfer a lot of heat and feels pretty unbearable at around 60*C but also friction in the bushing would generate its own heat too!
Loic to Loris
That is true, but just leaving it outside for 15 minutes should bring it very close to the outside temp too.
BTW it's not possible to quote multiple posts in one post...
Was just reading Escape Collective's article about security researchers hacking a Shimano Di2 drivetrain (tl;dr it's possible but highly unlikely in any real-world scenario) and this quote about wireless drivetrains jumped out at me:
"Wireless shifting has also made aspects like installation simple and easy to do. In fact, that’s the primary reason we have it, said Wakeham. He pointed out that riders aren’t the main customer for big component brands like SRAM and, especially, Shimano; bike brands like Specialized and Trek are. For the rider, 'wireless isn’t innovation for the user except in aesthetics,' he said, because shifting is slower than full-wired systems and of course the system is less secure. But wireless shifting solves a bothersome problem for bike brands: assembly. As Wakeham put it, 'it means complex internal wire routing can be avoided in factories.'" (https://escapecollective.com/heres-the-real-lesson-from-that-wireless-shifting-hack/)
Don't think I've heard this specific explanation before. Is it plausible that shaving down assembly time/cost is really a major driver for the proliferation of wireless drivetrains?
Yes.
It's hard to see as currently they're more expensive, but the price will come down in real terms each generation whereas labour cost in general, stays constant or increases in real terms.
Its why straight pull hubs exist, its why a lot of things in the automotive world are the way they are, so robots can do the assembly.
Would I say its on the only reason, no definitely not. A big driver in the performance bike world is aerodynamics for road bikes, and because of the UCI weight limit has been hit for over a decade now, road bikes essentially have weight to spare they can use on things like no cables etc. Because they developed it for road bikes, they'll pass it onto mountain and commuter bikes next.
Definitely sounds possible. Looking at specialized and santa cruz doing away with cable routing for a derailleur on some bikes leads to not only less assemble time and cost but less manufacturing cost by cutting out tube in tube routing. Makes the frame a bit cheaper to make but the bikes arnt any cheaper. Probably increases profit margin a little bit as well.
Nothing about a dedicated cc frame or the new stumpy says “hey we’re trying to save a couple dollars on manufacturing”.
It’s an aesthetic choice on a very expensive model. Personally I think it would be especially cool if you run external rear brake (my preference practically too) leaving no need for internal routing or a stupid headset. Clean head tube, cleaner bars, easier setup and maintenance. I don’t think charging a battery is a big ask in today’s world.
I hear 2025 is a shimano release year. So hopefully electronic deore by 2026. But we will see I suppose. Until something cheaper comes out I’ll just use zip ties partly out of spite.
Doing away with cable ports will also make the frame inherently stronger, as you will have less holes, and therefore lighter as they do not need to reinforce those places. Marginally, yes. I also think this is why many are using headset routed cables.
I can hear whinings about proprietary shocks already...
I watched the loam wolf review of the bronson. They had a guy from santa cruz there. He said a big part of them ditching the internal routing was to save some weight and set the cc frame apart from the c. I think he said it saved around 300g
he said 100. which is quickly reg gained right where it matters, at your rear axle with those bricks, hem, sorry, transmission deralieurs
can't be too long
We can finally buy a $15k Pivot......rejoice!
are the downvotes based on? cause i'm talking facts here, oh let's remember the 28gr for a udh, so at the axle, Gx vs GX t-type you have ( cassette + deralieur ) 738gr vs 936gr, so 200gr of extra unsprung weight, on a total of 219gr more for t- type, now on XO is 370gr, so the huge (100gr) weight saving on the frame are not only gone but gone right at your rear axle, nice
Attitude.
I can see them being attracted to this solution because it seems like one of the few ways left to up the ante: run the hose connecting the shock and reservoir through a port in the downtube.
Not so much tough crowd I guess 🤷
Bottom line, you can sell more bikes if you make them more different. Print that on a shirt and sell em! :-)
I prefer climbing with an 11 speed, even when I travel to CO to ride bigger stuff than what we have locally, as it prevents me from dropping in to a too low gear.
Especially with the MX rear tire being smaller and providing some gearing advantage. Also, the extra ground clearance of the shorter derailleur combined with the MX rear wheel is appreciated.
The weight savings off of the rear wheel (cassette & derailleur) is a solid 300 grams (2/3#s) which I'm convinced is enough that I can tell a difference in suspension performance, but maybe it's just in my head.
Sure, looks better too! Also, it's an all steel cassette which is great for longevity.
All in with Eewing cranks I'm sitting at less than 1400 grams for my entire drivetrain.
https://www.instagram.com/p/C-65j11zThT/?igsh=d2tlazlpOXJlYjU=
Can’t copy text from the insta post from mobile, but “Suspension Tech International”, apparently a high end suspension tuning shop for moto and MTB in NZ, seems to be making their own shock now. Enduro coil.
There was article about it quite some time ago on pinkbike I think, it's been long time coming.
Paste instagram in with the youtube button
https://www.pinkbike.com/news/factory-tour-suspension-tech-internationa…
That was just one of the prototypes
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