- Backside Bracket:
BB91 threaded backside bracket,BB91 BC1.37 * 24T appropriate for 68-73mm backside bracket MTB, Highway bike.Constructed-in bearing with excessive lubricity.Easy pedaling and noise discount.Accommodates aluminum alloy gasket *3.
170mm Crank arm.104BCD.Hole Built-in.Comes with BB91 threaded backside and crank mud cap. Crank mud cowl successfully protects the crank.Huge and slim tooth single pace spherical chainring.weight:round 900g .
Inside weight discount design,Make cranks lighter.It’s mounted with a number of threads.make the crank drive extra direct.CNC machining course of, And floor warmth therapy course of forging.Increased power.
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