TruVativ HammerSchmidt Cranksets combine all the benefits of a singlering crank, a doublering crank and a chain guide. Available in All Mountain and Freeride. Combines all the benefits of a singlering crank, a doublering crank and a chain guide Sun and planetary gear system inside the spider provides 1.61 overdrive ratio for the approximate equivalent of 2236tooth or 2438tooth gearing Shift instantly while pedaling under load, while stopped or while coasting HammerSchmidt
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