Road crankset Sram Rival22 Bb30 Yaw 50/34 No Bb .Specifications:Arm material: Forged aluminum arm, machined alloy spiderChainring material: Machined alloy ringsWeight: 873 g (BB30 172.5 mm 52x36 not included)Compatibility: Front derailleurs SRAM RED® 22, Force 22 & ; Rival 22 Yaw ? / Chains SRAM PC 1170 & ; PC 1130Recommended chain : SRAM PC 1130 chainFeatured technology(ies): X-GlideR chainrings / Hidden bolt configurationTechnology:BB30: In addition to significant weight savings, this bottom bracket also reduces Q-factor, increases peg clearance, improves bearing durability and strengthens crank construction.GXP®: The GXP® Gutter Seal design reduces friction and weight, improving feel and performance.PressFit: A variation of the GXP external crankset, PressFit reduces weight by up to 40 grams and makes installation easier by allowing you to press the bearing cups into the frame instead of screwing them in. It requires no modification to the length and diameter o...