Compatibility: Easy Install and Maintenance Free – This ShockStop stem fits oversized 1-1/4in (31.8mm) steerer tubes, used by brands such as Canyon and Giant. The ShockStop stem is also available for standard 1-1/8in (28.6mm) steerer tubes; the size used by most modern bikes. The stem fits 31.8 mm handlebars (shims available for 25.4 mm and 26 mm) and comes in a flippable +/-6 degree angle in 80, 90, 110, 110, and 120 mm lengths. RIDE FURTHER, FASTER, AND MORE COMFORTABLY - The ShockStop bike handlebar suspension stem is the perfect upgrade to your e-bike, gravel bike, hybrid, or road bike. Float over obstacles and dampen vibrations so you can ride longer, go faster, and stay in control even on the roughest terrain. UP TO 70% BUMP AND VIBRATION DAMPENING - Say goodbye to sore hands, wrists, back, and neck and say hello to increased control, more confidence, and a super smooth ride. The shockstop shock absorber bike stem reduces the effects of impacts and vibrations by up to 70%. REDUCE FATIGUE AND INCREASE EFFICIENCY - Stop wasting energy absorbing impacts and vibrations with your body. This suspension stem for bicycles dampens bumps and vibrations which reduce fatigue and enable you to go further and faster on the bike you already own. 20MM OF DAMPED SUSPENSION TRAVEL - Just the right amount of vertical compliance without sacrificing any stability or compromising steering. In the lateral direction the stem is as rigid as a standard stem allowing you to sprint or climb out of the saddle with confidence. And the 5 swappable elastomers let you dial in the perfect stiffness and feel.