InfoBrand new for 2011 X9 cranks Hollow Forged AL crank arms for lightweight super stiff durability X-Glide 2X10 and shifting technology
(Bottom Bracket Not Included)
Arm Material AL-7075
Weight 881 Grams (GXP w/BB)
Gear Ratios 26-39,
Bolts AL Double Hex Type
Recommended Chain 10 Speed
Material Crank Arm Material Hollow forged,
Chainring Inner Position – Material 7075
GXP: External Bottom Bracket
GXP is different — and better. Other systems rely on side-loaded bearings to eliminate play, causing bearing wear. GXP captures the left-side bearing between the spindle and the left crankarm and allows the drive-side bearing to float axially on the spindle. There’s no need to side-load bearings during adjustment. No excess wear. And a much simpler installation. Just tighten to the proper specifications and you’re ready to roll, worry-free. GXP’s two bicycle-specific cartridge bearings and eight seals ensure a smooth, long-lasting ride. Our new Gutter seal system takes a two stage approach in directing contaminates away from the bearings providing longer bearing life. GXP’s new Gutter Seal design also reduces friction, 35% less drag than the current GXP BB, improving rider feel and performance. Gutter seal system has deeper installation tool grooves which provide stability and support while applying torque to the adapter cups. Our new design and material choice has dropped 15g out of our GXP BBs.
This is a new design led by SRAM. It’s all the best from BB30 and Press-Fit bottom brackets in one captivating package. This bottom bracket is designed for 30mm spindle cranksets. The key difference with PressFit 30 is how the bearings are fitted into the frame. Bearings are housed in nylon cups which will be pressed into the frames bottom bracket shell. PressFit 30 will feature an integrated seal, pre-assembled into the cups, to further prolong bearing life. Frames will need a 46mm inner-diameter bottom bracket shell to accommodate this system. PressFit 30 for road will require a 68mm wide shell while PressFit 30 for MTB will require a 73mm wide shell. Advantages: Huge weight savings, narrow Q-factor, more ankle clearance, greater bearing durability, stiffer/stronger crank construction, simple installation. Allows for larger diameter frame tubes increasing frame stiffness. Drawbacks: Still searching
X-Glide is the common denominator that gives 2X10 unmatched shifting performance. Four identical upshift locations, ready to be be picked up by any outer link. Result? Perfect timing, almost instaneous shifts, up or down, even under load.
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