Shimano Deore XT Dyna-Sys 10-speed 40/28 Crankset

Shimano's Deore XT Dyna-Sys 10-Speed Crankset boasts race-worthy efficiency. 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 40/28 ratio gives you less overlap of gears, making for more efficient shifting and pedaling, especially with full-suspension bikes. This design also sports external bottom bracket bearings that increase rigidity and durability.