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Better design for belt drive bikes

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Better design for belt drive bikes

Old 04-08-21, 01:17 AM
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alo
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Better design for belt drive bikes

When regular bikes use belt drives, the chain stay goes through the belt. So there needs to be some way of breaking the frame to fit a belt, or some way of breaking the belt.

This could be avoided by making bikes with higher chain stays, which go above the belt. This would be a simple design modification. There are probably some belt drive bikes which do this already.
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Old 04-08-21, 01:32 AM
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There are (were?) mountain bikes with a design like this. Works fine.
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Old 04-08-21, 02:16 AM
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If frame manufacturers made frames like this, they could be used for either chain drive or belt drive, which would probably result in selling more frames.

It would also give those wanting belt drives more frame options.
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Old 04-08-21, 03:06 AM
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Chain is still inboard of the elevated chainstay---i.e., chain still passes through the frame. (See photo below; cable housing is outside frame, chain is inside.) Manufacturer would have to eliminate both the right chainstay and seatstay.

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Old 04-08-21, 05:35 AM
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Originally Posted by Trakhak View Post
Chain is still inboard of the elevated chainstay---i.e., chain still passes through the frame. (See photo below; cable housing is outside frame, chain is inside.) Manufacturer would have to eliminate both the right chainstay and seatstay.

It appears to me that if you removed the wheel, you could remove the belt on a frame like this.
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Old 04-08-21, 05:49 AM
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Originally Posted by subgrade View Post
As long as the rear cog is still inside the frame dropout, the belt/chain still crosses the chainstay. The elevated (or dropped, as in modern gravel bikes) chainstay is a solution for chainring / tire clearance, nothing to do with the chain or belt.
To solve the frame splitting problem there are two options - move the rear cog outboard the frame, or get rid of both chainstay and seatstay on the drive side. Both seem possible, but would be rather sophisticated solutions and most probably are far from cost effective.
Nah, the bike above can take a belt if so desired the chain stay attachment point is above the chain , tensioning it, not so easy. Thing is a split seat stay is probably cheaper, but an IGH is more expensive, so derailleurs and chains it is.
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Old 04-08-21, 09:17 AM
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Originally Posted by Trevtassie View Post
Nah, the bike above can take a belt if so desired the chain stay attachment point is above the chain , tensioning it, not so easy. Thing is a split seat stay is probably cheaper, but an IGH is more expensive, so derailleurs and chains it is.
Correct. That frame will take a belt.

Using a track style dropout on an elevated CS bike is easy. Wrap belt around rear pulley, install wheel all the way forward, wrap belt around crankset pulley, pull wheel rearward to tension, and off you go. We do stuff like this all day when building custom motorcycles etc.
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Old 04-08-21, 10:03 AM
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I'm not sure what the point of this post is.

https://spotbikes.com/products/rocke...32140479889442
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Old 04-08-21, 11:04 AM
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There is a BMX company called YESS and they have done it both ways.



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Old 04-08-21, 12:30 PM
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Pretty much been there, done that, got the souvenir t-shirt, gimme cap and autographed poster.


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Old 04-08-21, 08:52 PM
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The Allied Able is elevated chainstay but they don’t offer belt drive, oddly. https://alliedcycleworks.com/collect...-able-frameset
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