SRAM Rival 22: Rival Your LimitsYour needs aren\'t less demanding. They\'re different.The new SRAM Rival 22 groupset delivers immense performance across a broad variety of bikes and disciplines. Paved or not. Cyclocross or triathlon. Road racing or unchartered journeys. Rival 22 gives the ergonomics, efficiency and technology for finely tuned cyclists to meet each challenge and expand their limits.Dedicated cyclists\' demands are different not less than the pro\'s. Their demands change and evolve with their riding and performance, whether they\'re race ready or adventure ready. So why settle for a group that\'s simply ratcheted-down to 75 percent of what the pros ride? Rival 22 delivers 100 percent of what cyclists demand.Arm Material: Forged Aluminium Arms/ Machined Alloy Spider,Chainring Material: Machined Alloy Rings,Weight: 873g (BB30 172.5mm 52x36 BB not included)/ 857g (GXP 172.5mm 52x36 BB not included),Available Arm Lengths: 165mm, 167.5mm, 170mm, 172.5mm, 175mm, 177.5mm,Available Ratios: 52/36, 50/34, 46/36,Compatibility: SRAM RED 22, Force 22 & Rival 22 Yaw Front Derailleurs/ SRAM PC 1170 & PC 1130 chains,Recommended Chain: SRAM PC 1130 chain,Technology Highlight(S): X-Glide R chainrings/ Hidden Bolt configuration.