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Old 03-02-21, 10:06 AM
  #59  
70sSanO
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Bikes: 1986 Cannondale SR400 (Flat bar commuter), 1988 Cannondale Criterium XTR, 1992 Serotta T-Max, 1995 Trek 970

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Originally Posted by prj71
Once price and weight issues are solved, this or something similar will be the future...

https://pinion.eu/en/

https://www.cyclingabout.com/tour-wi...inion-gearbox/

https://zerodebikes.com/bikes
I agree completely. If you think about the fact that SRAM machines their cassette blocks from a single piece of material to save weight is insane, and makes them money from people willing to pay. It’s baffling.

The other issue is the bottom bracket. Nearly every component interface has changed from thru axles to tapered steering tubes, the the bottom bracket is largely unchanged for decades as far as dimensions.

Think about having a 2:1 ratio. Running a 20t that can output at a 40t rate without any difference in chain length/wrap. Pretty crazy.

John
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