Size Length:780mm; Diameter:31.8mm; Riser:35mm/50mm/70mm/90mm/120mm;Bar end diameter:22.2mm;Back sweep:9 degree. Lightweight and Durable PLATT mtb handlebars are made of high-quality aluminum alloy 6061,Lightweight strong and durable,anti-Shock,give you a sense of security, no matter how rough the terrain. Ergonomic Design Our mountain bike bars coming in at 9 degrees of back sweep, helps put your shoulder blades in a more neutral position while reducing wrist fatigue and discomfort.Smooth curves mold to your body and provide a good support.numerical controlled precision bending. Easy Installation Please ensure the handlebar's diameter is the same as the stem before your order. First, detach all your handlebar components when installing PLATT handlebar. Next, attach the handlebar and adjust the bar angle tightening the stem when satisfied.