The BBB RoadForce II handlebar stem is designed to provide an optimal riding position with a 6-degree angle, allowing you to adjust your handlebar's drop or rise. It features a bar center diameter of 31.8mm, making it compatible with standard handlebars. This particular model has a length of 50mm, and it is also available in other sizes ranging from 40mm to 130mm. The stem is engineered for a fork pipe diameter of 28.6mm. Certified for all bikes, including MTBs and e-bikes, this fixed bike stem is constructed from durable 3D forged aluminum, ensuring it can change the behavior of any bike.