Pretty much since the advent of gears on bicycles, the derailleur has been the dominant mechanism for shifting the chain between gears. However, being dangled by the rear wheel, exposed to the elements, is a risky place to hang out. Internal gear hubs and mechanisms have long been touted as the future of mountain bike drivetrains, yet have never had the impact they’ve promised. Why is that? And what could the future hold for gear shifting on mountain bikes – Seb and Tom discuss.
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