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Comment on Driven – A bicycle drivechain concept without derailleurs and chainsparent

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IMO it’s probably that wheels are a lot lighter now. Rotational mass is a killer.

I've got two different sets of wheels for the same gravel bike. Its standard 42 mm wheels for gravel and 28 mm slick wheels I assembled for road. Same brake rotors and same gears on the back. The set of road wheels is about 1.5 kg lighter (3 pounds). The bicycle seems to fly with them. Rotational mass is really important and also slick vs threaded.

True, good point.

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