Ohlins TXC2Air Trunnion Rear Shock Bring Enhanced Precision and Control To Your XC Bike If you're looking to enhance your cross-country mountain bike's performance, then you might want to upgrade your rear shock. The Ohlins TXC2Air Trunnion Rear Shock boasts a full range of stroke options, bringing enhanced precision and control to XC bikes with a less progressive linkage. It features 3 ride modes developed and tested to save seconds on the racetrack, a rider-friendly volume spacer system so you can adjust the spring progressiveness, remote and manual control options, 12 clicks of rebound, and race-proven TTX technology. Features Race-proven TTX twin-tube technology for superior small bump sensitivity and enhanced traction Hydraulics optimized for XC racing Rider-friendly volume spacer system to adjust the air spring progressiveness SPECIFICATIONSDamping-Spring Air Spring Adjustments Rebound, Compression Coating-Size & Options165/190 - 37. 5/40/42. 5/45 and 185/210 - 47. 5/50/52. 5/55Intended Use XCWeight255g Approximate | Ohlins | Txc2Air Trunnion Rear Shock Blk 185 X 47. 5, 50, 52. 5, & 55Mm