Shimano Deore XT M8100 12 Speed CassetteCreated for tough off-road trails, the Deore XT M8100 12 Speed Cassette from Shimano delivers efficient shifting performance no matter what the terrain. This cassette incorporates Hyperglide+ technology which enhances your gear changes and its lightweight and durable composition enables faster acceleration and increased chainset reliability. Features:Material: AluminiumSpeed: 12 speedCompatible Chain: HG 12 speedType: Hyperglide+10T lowest sprocket realised by new freehub body constructionDefinitive shifting performanceWide rangeTechnologies:Hyperglide+: Hyperglide+ drivetrain’s redesigned cassette and chain promote the next generation of MTB (mountain bike) riding by enhancing speed, shifting efficiency and smoothness over any terrain. It will help kickstart the next generation of mountain bike riding by introducing continuous pedalling over virtually any terrain. This revamped drive system and dedicated chain deliver fast-shifting, efficient power transfer and chain stability like you’ve never experienced before. It helps riders adapt to drastically changing trail conditions by precisely judging the optimal shifting moment for consistently smooth operation.Micro Spline: Micro Spline delivers lightweight aluminium freehub body to reduce weight and 10 teeth top gear.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.