Shimano FC-E8050 Crank ArmsThese crank arms are specifically designed for E-MTB riding, as they offer exceptional torque power and smooth performance. They feature a rock-solid aluminium construction, which makes them more than capable of handling the increased speeds and intensity that’s associated with electric mountain bikes. Shimano has also taken the design of these crank arms up a notch by equipping them with Hollowtech II technology. This means that you’ll benefit from their fantastic strength to weight ratio as you weave between the MTB trails at speed. Features:Material: AluminiumUse: E-MTBAxle: 24mm axle serrationLength: 170mmCrank Arm Type: Hollowtech IIChainguide Included: NoCompatibile Chainsets: Shimano Deore XT, Shimano Steps E8050Single or Pair: PairPart Number: 84916015Technologies:Hollowtech II: Hollow forged crank arms. A lightweight crankset not only reduces the bike’s weight, but decreases rotating mass to aid in acceleration. The challenge is to reduce the weight of the crank without reducing its strength and rigidity. SHIMANO’s advanced forging technology has solved the problem through the HOLLOWTECH crank. Just like high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very lightweight.Dynamic Chain Engagement: Ensures secure chain retention.A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.