Shimano's Deore XT Dyna-Sys 10-Speed Crankset boasts race-worthy efficiency with all-mountain chops. Shimano incorporates the crankarms and the bottom bracket spindle into a single unit so you shave grams without losing a drop of valuable pedal power. The 38/24 ratio gives you less overlap of gears, delivering more efficient shifting and pedaling, especially with full-suspension bikes. Plus, the bottom bracket features external bearings that increase rigidity.
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I bought this crank to switch from a 3x10 XT drivetrain to 2x10 on my cross country race bike (Giant Anthem X 29er). It is super light without emptying the wallet and the all black/silver design is sleek. Shifts lightning quick (paired with a Shimano XT 2x10 Derailleur).