Every ride has its rough patches - whether it&';s harsh gravel, city potholes, or long stretches of broken tarmac. The patented ShockStop Suspension Stem is engineered to take the sting out of any route. Reduce fatigue and maximize comfort without losing speed or control. It&';s the essential comfort upgrade, trusted by cyclists for everything from gravel/road adventures to daily commutes. a COMPATIBILITY NOTE: If you have a Canyon, Giant, or Scott, it may have a non-standard oversized steerer tube. We have a version that will fit these bikes. If you&';re unsure if your steerer tube is standard or oversized, please contact us in the chat or email us at [email protected] and we can help you choose the right version. 80-120mm Lengths 55, 70mm Lengths (NEW) Weight 256 g +/- 6 deg, 80mm266 g +/-6 deg, 90mm278 g +/-6 deg, 100mm290 g +/-6 deg, 110mm302 g +/-6 deg, 120mm253 g +30 deg, 80mm278 g +30 deg, 100mm 185 g +6 deg, 55mm212 g +6 deg, 70mm Steerer Clamp Diameter (A) Standard 1-1/8 inch (28.6 mm)Oversized 1-1/4 inch (31.8mm, for +/-6 deg options only, Standard 1-1/8 inch (28.6 mm) Handlebar Clamp Diameter (B) 31.8 mm 31.8 mm Effective Travel Up to 20mm Up to 20mm Material 6061 T6 aluminum 6061 T6 aluminum Rider Weight Limit 135 kg (300 lb) 135 kg (300 lb) Steerer Tube Clamp Stack Height 40mm 44mm Compatibility Drop Bars and Flat Bars note: flat bars with large back sweep might reduce effectiveness Drop bars only Intended Use ASTM F2043 Class 2 - For on and off-road riding and drops less than 15cm (6"). ASTM F2043 Class 2 - For on and off-road riding and drops less than 15cm (6").