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June 12, 2013, 11:56 a.m. -  hampstead_bandit

#!markdown @craw I was a big fan of gearbox, hub gears and belt drives (in the 90's I rode for a DH team sponsored by Sachs i.e. now SRAM and we had a full choice of all their geared systems including hub gears and derailleur systems, we tested them all…) the video shows both SRAM and Shimano derailleur systems being used, so it cannot be discounted as just a marketing video for SRAM to sell more derailleurs? gearbox bikes are fantastic in principle, just like hub gears (Rohloff and Shimano Alfine which make sense for niche usage) but ultimately the bushingless chain and derailleur system simply cannot be beaten for efficiency? which is everything, when talking about a human powered vehicle where strength to weight ratio of the bicycle, and drivetrain power efficiency are very critical, bearing in mind the limited power output of the average cyclist…

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