Zerode have a new DH bike coming, High Pivot and apparently similar to the Commencal Supreme (not too sure if it's similar to the production or prototype bike.) Should be ready for production in the New Zealand/Southern Hemispheres 22/23 season
Both claim ‘x’ times better flow rate than a Presta valve (x4 here) but what is the flow rate of a Schrader valve compared to these or a Presta? They seem to be a solution to a problem that has already been solved.
Both claim ‘x’ times better flow rate than a Presta valve (x4 here) but what is the flow rate of a Schrader valve compared to these...
Both claim ‘x’ times better flow rate than a Presta valve (x4 here) but what is the flow rate of a Schrader valve compared to these or a Presta? They seem to be a solution to a problem that has already been solved.
Schrader also gets filled by the sealant... I've used it for years in ghetto tubeless setup on my 26" bike back in the days and after some time the flow rate was close to zero
Maybe the ultimate solution is this poppet design in a schrader sized valve.. With some many rims going wider, why do we stay with the presta valve? There is now plenty of rim material to allow for a little bit of a bigger hole...
Maybe the ultimate solution is this poppet design in a schrader sized valve.. With some many rims going wider, why do we stay with the presta...
Maybe the ultimate solution is this poppet design in a schrader sized valve.. With some many rims going wider, why do we stay with the presta valve? There is now plenty of rim material to allow for a little bit of a bigger hole...
there was plenty of rim material 20+ years ago when rim makers used schrader sized holes with grommets for presta valves on 20mm internal width rims.
Maybe the ultimate solution is this poppet design in a schrader sized valve.. With some many rims going wider, why do we stay with the presta...
Maybe the ultimate solution is this poppet design in a schrader sized valve.. With some many rims going wider, why do we stay with the presta valve? There is now plenty of rim material to allow for a little bit of a bigger hole...
Smaller hole in the rim means a stronger wheel. You lose air from the tire when you disconnect the pump unless it’s screw on head like we use for suspension. Have to use valve cover so the void doesn’t fill with mud/sand or whatever. As for the inner core you are talking 5V1 and 5V2 threads, same diameter just different pitch.
Looks like I was right about the frame being bolted together. #validated #internetdetectivepoints
Jokes aside, some interesting construction methods going on there. Don't have time to...
Looks like I was right about the frame being bolted together. #validated #internetdetectivepoints
Jokes aside, some interesting construction methods going on there. Don't have time to watch the video ATM but I am curious to know why they went that route and how it compares to other companies who have tried similar framebuilding techniques (e.g. Pole).
In their videos & Instagram, they have said that the CNC is just a prototype or "test mule" as they call it, and the production will all be carbon, but it was easier to machine a test and use those dropouts for wheel testing.
Also looks like they have links from Cascade on the proto, not sure if production will be made by Cascade...
Regarding schrader valves, has anyone seen an inner tube with a threaded ring when it comes to schrader valves? Not an issue for tubeless valves (though having a flange and sealing it in the rim valley might also be an issue with a larger diameter), but when it comes to filling up tubes, that's a pain in the ass compared to the presta with the ring - it's easy to press on the pump (head) on the presta while the schrader tends to fall into the rim. Even more so, if the tube is slightly inflated, so you can't support it from the tread side.
I really don't see how schrader valves are superior to presta valves. Except for being able to pump them on a gas station.
Regarding schrader valves, has anyone seen an inner tube with a threaded ring when it comes to schrader valves? Not an issue for tubeless valves (though...
Regarding schrader valves, has anyone seen an inner tube with a threaded ring when it comes to schrader valves? Not an issue for tubeless valves (though having a flange and sealing it in the rim valley might also be an issue with a larger diameter), but when it comes to filling up tubes, that's a pain in the ass compared to the presta with the ring - it's easy to press on the pump (head) on the presta while the schrader tends to fall into the rim. Even more so, if the tube is slightly inflated, so you can't support it from the tread side.
I really don't see how schrader valves are superior to presta valves. Except for being able to pump them on a gas station.
A fair number of Specialized's "comfort" bikes have Schraeder valves that are fully threaded and have a small ring that screws down to the rim. I imagine they do it for the exact reason you specify - the valve gets pushed into the rim when you try to inflate the tube.
Regarding schrader valves, has anyone seen an inner tube with a threaded ring when it comes to schrader valves? Not an issue for tubeless valves (though...
Regarding schrader valves, has anyone seen an inner tube with a threaded ring when it comes to schrader valves? Not an issue for tubeless valves (though having a flange and sealing it in the rim valley might also be an issue with a larger diameter), but when it comes to filling up tubes, that's a pain in the ass compared to the presta with the ring - it's easy to press on the pump (head) on the presta while the schrader tends to fall into the rim. Even more so, if the tube is slightly inflated, so you can't support it from the tread side.
I really don't see how schrader valves are superior to presta valves. Except for being able to pump them on a gas station.
Yes.. And Stan's even offers tubeless Schrader valves..
Regarding schrader valves, has anyone seen an inner tube with a threaded ring when it comes to schrader valves? Not an issue for tubeless valves (though...
Regarding schrader valves, has anyone seen an inner tube with a threaded ring when it comes to schrader valves? Not an issue for tubeless valves (though having a flange and sealing it in the rim valley might also be an issue with a larger diameter), but when it comes to filling up tubes, that's a pain in the ass compared to the presta with the ring - it's easy to press on the pump (head) on the presta while the schrader tends to fall into the rim. Even more so, if the tube is slightly inflated, so you can't support it from the tread side.
I really don't see how schrader valves are superior to presta valves. Except for being able to pump them on a gas station.
A fair number of Specialized's "comfort" bikes have Schraeder valves that are fully threaded and have a small ring that screws down to the rim. I...
A fair number of Specialized's "comfort" bikes have Schraeder valves that are fully threaded and have a small ring that screws down to the rim. I imagine they do it for the exact reason you specify - the valve gets pushed into the rim when you try to inflate the tube.
Sounds like they have some new-old stock of IRC downhill tubes.
Regarding schrader valves, has anyone seen an inner tube with a threaded ring when it comes to schrader valves? Not an issue for tubeless valves (though...
Regarding schrader valves, has anyone seen an inner tube with a threaded ring when it comes to schrader valves? Not an issue for tubeless valves (though having a flange and sealing it in the rim valley might also be an issue with a larger diameter), but when it comes to filling up tubes, that's a pain in the ass compared to the presta with the ring - it's easy to press on the pump (head) on the presta while the schrader tends to fall into the rim. Even more so, if the tube is slightly inflated, so you can't support it from the tread side.
I really don't see how schrader valves are superior to presta valves. Except for being able to pump them on a gas station.
I think all the Specialized schrader tubes are coming with the lockring now too. Very handy
Regarding schrader valves, has anyone seen an inner tube with a threaded ring when it comes to schrader valves? Not an issue for tubeless valves (though...
Regarding schrader valves, has anyone seen an inner tube with a threaded ring when it comes to schrader valves? Not an issue for tubeless valves (though having a flange and sealing it in the rim valley might also be an issue with a larger diameter), but when it comes to filling up tubes, that's a pain in the ass compared to the presta with the ring - it's easy to press on the pump (head) on the presta while the schrader tends to fall into the rim. Even more so, if the tube is slightly inflated, so you can't support it from the tread side.
I really don't see how schrader valves are superior to presta valves. Except for being able to pump them on a gas station.
Maybe the almost negative market demand considering no one buys DH bikes anymore and most of those who do are thrashing the budget spec models at bike parks?
Maybe the almost negative market demand considering no one buys DH bikes anymore and most of those who do are thrashing the budget spec models at...
Maybe the almost negative market demand considering no one buys DH bikes anymore and most of those who do are thrashing the budget spec models at bike parks?
Yeah I understand the low market demand. I was more asking about the matter of fact tone of ‘it’s not happening’, I wondered if they had insider knowledge.
It’s true dh bike sales are low but I still think if a dh gx axs group was released there would still be the few buying it who absolutely must have the best kit. Which, going by the internetz, is still quite a lot of people.
In terms of production it wouldn’t be too much extra effort in terms on manufacturing cost for sram. It only takes putting a short cage on to an existing gx axs mech and new firmware.
When the original 7 speed x01 dh group set was released it seemed like no one would be spending that kind on money. Yet it still took off.
I wouldn’t be surprised to see a dh oriented axs group released in the near future.
This doesn't quite cover the same 7 speed range that DH folk want, and definitely would forgo the simplicity of use you get from a 7 speed, but you can just use an XX1/X01/GX AXS paddle remote with an XPLR AXS derailleur to set up a sort of 12 speed 10-25/10-28/10-30 DH group if you want to.
That's surely where they would introduce 7 speed AXS.
Ha, got them!!
What I meant is that if Shimano will go all in with Saint and release it fairly soon, DH market still has some life in it left. If all the Saint proto stuff will just whittle away, then the market is so small, it doesn't make it worth it to make a special group.
This is something we have been kicking around for a while at Trinity MTB. Can we create a "gearbox" with existing components. It's definitely Honda RN01 inspired, but with AXS we think it takes their idea to the next step.
The main question that I have is how to make the 'front chainring' slide left-to-right on the input axle without issues (Honda did this on the RN01 'production' gearbox too). Packing a 12spd cassette and a derailleur with the front chainring is not an issue, as long as the chainring can adapt to the chainline (i.e. make is straight in any gear). There is _NO_ way to make it work with the chainring fixed in the middle of the cassette, the axle to axle distance is too short for the chain to bend that much.
Otherwise it's a non-issue. And AXS doesn't seem like a big benefit to me, even more so if you'd enclose the whole thing in a metallic/carbon fibre casing, as you'll be blocking the wireless signal to the derailleur. And it makes sense to close it off to protect it from the dirt and do wet sump lubrication on the system
I think if you take care of the axial sliding, mounting the cassette to a 'freehub' and the derailleur to a mount inside a casing (or just inside the front triangle) is fairly easy. Deal with bearing supports for the two axles and the input and output gears (to bring the power in from the pedals and take it back to the rear wheel) and you're done. And it makes all the sense in the world to do it if you want a 'gearbox' bike, as you use off the shelf components, that are reliable (even more so, when they are protected and in a clean environment), fairly light and the system is known to be efficient.
Also looks like they have links from Cascade on the proto, not sure if production will be made by Cascade...
I really don't see how schrader valves are superior to presta valves. Except for being able to pump them on a gas station.
https://www.instagram.com/p/CWBwZUwjZtN/
It’s true dh bike sales are low but I still think if a dh gx axs group was released there would still be the few buying it who absolutely must have the best kit. Which, going by the internetz, is still quite a lot of people.
In terms of production it wouldn’t be too much extra effort in terms on manufacturing cost for sram. It only takes putting a short cage on to an existing gx axs mech and new firmware.
When the original 7 speed x01 dh group set was released it seemed like no one would be spending that kind on money. Yet it still took off.
I wouldn’t be surprised to see a dh oriented axs group released in the near future.
What I meant is that if Shimano will go all in with Saint and release it fairly soon, DH market still has some life in it left. If all the Saint proto stuff will just whittle away, then the market is so small, it doesn't make it worth it to make a special group.
Otherwise it's a non-issue. And AXS doesn't seem like a big benefit to me, even more so if you'd enclose the whole thing in a metallic/carbon fibre casing, as you'll be blocking the wireless signal to the derailleur. And it makes sense to close it off to protect it from the dirt and do wet sump lubrication on the system
I think if you take care of the axial sliding, mounting the cassette to a 'freehub' and the derailleur to a mount inside a casing (or just inside the front triangle) is fairly easy. Deal with bearing supports for the two axles and the input and output gears (to bring the power in from the pedals and take it back to the rear wheel) and you're done. And it makes all the sense in the world to do it if you want a 'gearbox' bike, as you use off the shelf components, that are reliable (even more so, when they are protected and in a clean environment), fairly light and the system is known to be efficient.
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