Race Face Turbine Single Ring Chainset with Bashguard: All Turbine cranks are painstakingly engineered using ultra high-strength 7050 aluminum, then near-net forged & CNC finished for the aggressive I-Beam profile youve come to know & trust from Race Face. & because its from Race Face, you can expect them to be packed with more useful features than a Swiss Army knife: 7075 rings for precision shifting & wear resistance, alloy Torx hardware for a secure installation, removable granny spider for better chainguide fitment, & an available titanium spindle for your inner weight weenie. The product of years of R&D, its been an amazing experience designing, riding, & abusing these cranks. 9 or 10 Speed Compatible Light enough for XC but strong enough for aggressive all-mountain riding New lighter weight Turbine BB with titanium coated bearing races to keep water out & and set a new standard in durability 7050 alloy construction, resulting in unmatched yield strength & stronger pedal threads than XT Lifetime warranty (versus XTs 2 year coverage)