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You could probably get most of the benefits of a belt drive by enclosed drivetrain

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You could probably get most of the benefits of a belt drive by enclosed drivetrain

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Old 05-07-24, 12:47 PM
  #26  
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Originally Posted by terrymorse
I heard that from Toyota:

"If your vehicle is equipped with a timing chain rather than a timing belt, there is no prescribed replacement interval."

I recently had the timing belt replaced on my Toyota Highlander, per the schedule maintenance (90k miles). Mrs tm's Prius has a timing chain, reportedly good for the life of the vehicle.
In a bicycle application, belts tend to outlast chains by a large margin. If you designed a bicycle chain drive to last 100k+ miles it would be unacceptably heavy. Instead we accept the compromise of a lightweight, consumable chain.

If there was a belt drivetrain with ratios matching a modern 2x12 derailleur without a significant weight or drive efficiency penalty I would be right on it. I can certainly see the attraction of a belt driven IGH for many riders. But it’s never really an option on the kind of road bikes I ride.
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Old 05-30-24, 05:34 AM
  #27  
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So much of cycling is "let's reinvent..."

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Old 05-30-24, 07:47 AM
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Originally Posted by Smaug1
I guess derailleur gears would be at 97% or pretty close to it as long as the chain line is pretty straight.
There is a small cost to the derailleur itself and then add on some inefficiency for cogs smaller than about 16t, and that gets worse as you go smaller.

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