The SRAM GX crankset delivers consistent performance every time out. Featuring SRAM’s X-SYNC™ tooth profile, the GX crankset is engineered for complete chain control. Each tooth’s thickness is CNC machined to work seamlessly with the chain’s inner & outer links. & with five available chainrings, you can personalize your gear range to match the way you ride. Besides serious weight savings, this bottom bracket means narrow Q-factor, more ankle clearance, greater bearing durability & stronger crank construction. With revolutionary advancements in bicycle componentry, like SRAM’s XX1, X01 & X1 drivetrains, mountain bike designers have been given almost limitless freedom to focus solely on the performance of the bike. Each advancement demands that the entire package works flawlessly. Aggressive trail & enduro riders have been increasingly enjoying the benefits of larger wheels, but many still view 27.5" & 29" wheels as a possible weak link. Which is why SRAM has developed an open standard with Boost compatible components for SRAM drivetrain, hubs & Rock Shox forks.GXP’s Gutter Seal design cuts friction & weight—improving both feel & performance To fabricate our Open Core Technology a single mass of premium alloy is pushed, pulled & squeezed into a hollow crank arm. During our exclusive process the magic happens, producing supreme strength while remaining weight-conscious. We may have not been the first to fabricate hollow crank arms, but we are the best by yielding the highest stiffness-to-weight ratio out there. Our OCT cranks are stiffer, stronger, & lightweight beyond any solid forged crankset & when we use our AL-7050-TV to fabricate with OCT the results are impressive.A variant of the external GXP bottom bracket, Press Fit cuts weight by up to 40 grams & eases installation by allowing you to press the bearing cups into the frame instead of threading them. It requires no change to the crank spindle length & diameter.