Nobl

Downhill BMX 17

Bike of the Day
1071 of 17504
(71 people)
johannordberg
12/29/2023 6:37am
Full suspension BMX
Full suspension BMX
IMG 5576x.jpg?VersionId=qPfZOmg6zrvkLm7VKlXueGB
IMG 5579x
Me and my bike.
Me and my bike.
IMG 5572x
BB and main pivot share axle to eliminate the need for a chain tensioner.
BB and main pivot share axle to eliminate the need for a chain tensioner.
Brake hose routed through steerer for max respect from other riders.
Brake hose routed through steerer for max respect from other riders.
Finished frame.
Finished frame.
Grinder and paint makes me the welder I ain't
Grinder and paint makes me the welder I ain't
Upper shock mount.
Upper shock mount.
411928222 201835706342941 4300305406009280779 n
Rear drop outs and brake mount.
Rear drop outs and brake mount.
Steel sleeve epoxied on to the lowers.
Steel sleeve epoxied on to the lowers.
Before paint.
Before paint.
Down tube and top tube extended on the grim reaper BMX frame.
Down tube and top tube extended on the grim reaper BMX frame.
The parts that makes up the BB/swing arm pivot.
The parts that makes up the BB/swing arm pivot.
Schematic section view of BB/main pivot assembly
Schematic section view of BB/main pivot assembly
Approx. geo.
Approx. geo.
Full suspension BMX
Full suspension BMX
Full suspension BMX IMG 5576x.jpg?VersionId=6SIEIWH8ku.20K60b22JQAiQHLsrHg IMG 5579x Me and my bike. IMG 5572x.JPG?VersionId=vWy pIetG.wjBg7htMDS BB and main pivot share axle to eliminate the need for a chain tensioner. Brake hose routed through steerer for max respect from other riders. Finished frame. Grinder and paint makes me the welder I ain't Upper shock mount. 411928222 201835706342941 4300305406009280779 n Rear drop outs and brake mount. Steel sleeve epoxied on to the lowers. Before paint. Down tube and top tube extended on the grim reaper BMX frame. The parts that makes up the BB/swing arm pivot. Schematic section view of BB/main pivot assembly Approx. geo.
Parts
Brand
Model
Additional info

Parts

Frame
Other
Eastern Grim Reaper and NS holy mashup
120 mm travel, 68° HTA, ~450 mm reach
Frame: Other Eastern Grim Reaper and NS holy mashup. Misc: 120 mm travel, 68° HTA, ~450 mm reach
Rear Shock
FOX
CTD of a stump jumper, 51 mm stroke
Rear Shock: FOX CTD of a stump jumper, 51 mm stroke
Fork
Fox
32 TALAS, 110-140 mm (I run it in 140)
1-1/8 inch steerer to fit the bmx headset. Converted to 20" by cuttning drop outs and replaced with glued on steel sleeves with the drop outs higher up.
Fork: Fox 32 TALAS, 110-140 mm (I run it in 140). Misc: 1-1/8 inch steerer to fit the bmx headset. Converted to 20" by cuttning drop outs and replaced with glued on steel sleeves with the drop outs higher up.
Headset
Other
Animal bikes
Integrated BMX headset
Headset: Other Animal bikes. Misc: Integrated BMX headset
Handlebar
Other
Federal BMX bars
Can't remember model but around 9.25" rise
Handlebar: Other Federal BMX bars. Misc: Can't remember model but around 9.25" rise
Stem
Other
Fly Bikes Potencia
Stem: Other Fly Bikes Potencia
Grips
Other
Get Sendy Slingers
Max Fredriksson's brand. Go Sweden!
Grips: Other Get Sendy Slingers. Misc: Max Fredriksson's brand. Go Sweden!
Brakes
Magura
MT5
203/180 mm rotors
Brakes: Magura MT5. Misc: 203/180 mm rotors
Brake Levers
Magura
MT5
Brake Levers: Magura MT5
Cranks
Other
Generic BMX 2-pc steel cranks
Cranks: Other Generic BMX 2-pc steel cranks
Chainrings / Sprocket
Other
30t
Chainrings / Sprocket: Other 30t
Bottom Bracket
Other
22 mm spanish BB. 4 bearings due to suspension pivot point being the same as the BB.
Bottom Bracket: Other 22 mm spanish BB. 4 bearings due to suspension pivot point being the same as the BB.
Chain
KMC
Kool Chain SL Ti-N
Chain: KMC Kool Chain SL Ti-N
Cassette / Rear Cog
Other
Sixpack ss-kit
13t, HG body
Cassette / Rear Cog: Other Sixpack ss-kit. Misc: 13t, HG body
Pedals
Crank Brothers
Stamp 1 plastic pedals
Pedals: Crank Brothers Stamp 1 plastic pedals
Front Rim
Other
Blank Generation XL
20", 36h
Front Rim: Other Blank Generation XL. Misc: 20", 36h
Rear Rim
Other
Blank Generation XL
20", 36h
Rear Rim: Other Blank Generation XL. Misc: 20", 36h
Hubs
Shimano
Cheapest Shimano
36h, 15x110 front, 12x148 rear
Hubs: Shimano Cheapest Shimano. Misc: 36h, 15x110 front, 12x148 rear
Spokes
Other
Spokes: Other
Front Tire
Maxxis
DHF 20x2.5
Ghetto tubeless with ghetto insert
Front Tire: Maxxis DHF 20x2.5. Misc: Ghetto tubeless with ghetto insert
Rear Tire
Maxxis
DHF 20x2.5
Ghetto tubeless with ghetto insert
Rear Tire: Maxxis DHF 20x2.5. Misc: Ghetto tubeless with ghetto insert
Saddle
Other
BMX seat/seatpost combo
Saddle: Other BMX seat/seatpost combo
General Info

General Info

Model Year
2022
Model Year:
2022
Riding Type
Freeride
Riding Type:
Freeride
Weight
30 lb 13.8 oz (14,000 g)
Weight: 30 lb 13.8 oz (14,000 g)
Additional Info

I wanted to know what it was like to BMX the bikepark. On a well prepped flow trail or in the queue to the uplift it's awesome. it's suprisingly stable for what it is. Otherwise it's awful. On brake bumps you struggle to hold the bars due to bad vibes. Still really happy I built it!

 

Additional Info:

I wanted to know what it was like to BMX the bikepark. On a well prepped flow trail or in the queue to the uplift it's awesome. it's suprisingly stable for what it is. Otherwise it's awful. On brake bumps you struggle to hold the bars due to bad vibes. Still really happy I built it!

 
johannordberg
12/29/2023 6:37am
1071 of 17504
17 comments

View replies to: Downhill BMX

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Ian_Furqueron
11 months ago

I love these FS frames... the WeThePeople and FingersCrossed versions are so cool. Especially the latter's Ti version.   Both used Manitou 20" forks.  
Do you have any more pictures of the bottom bracket pivot assembly?  I'm curious to see how the pivot works. 

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johannordberg
11 months ago

Yeah, this is very similar to Ruben's bikes. Fingers crossed was a huge inspiration. The main differences being the longer, slacker and lower geo, more travel and the addition of a shock yoke to get a more progressive rear end.

The manitou forks didn't feel beefy enough for this build. Ruben even managed to destroy one in a video i saw. They also only come with a tapered steerer and are 5x more expensive than used 26" fork so I made my own.

I made a schematic picture of the BB in paint that you can see above. Hope it makes things clear.

c50 InkedIMG 20190916 091656 LI 1568728615.jpg?VersionId=nDkskA9lzWfRNKRegf1Vd1wubhLe.
Ian_Furqueron
11 months ago

Interesting... Personally, I'd want the tapered steerer.  I'll admit I have wondered about the strength of the Manitou fork being used in these applications vs. under kids likely weighing half as much and usually not riding as hard.  I can totally understand the cost benefits of using an older 26" fork. 

Thanks for the schematic. Pretty much how I thought it would work, but that clears up the details. 

While I would not personally want one of these bikes, I love they exist and people ride them. 

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TannerVal
11 months ago

This is sick but those epoxied on axle tabs seem so sketchy. I think manitou might make a legit 20” suspension fork that goes up to 120 or 140

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johannordberg
11 months ago

I agree, sounds like a bad idea. I calculated this and since the glued surface area is so large it's actually way overkill. Also the sleeves are capped off at the end so it probably wouldn't go through even if the glue failed. 

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