This is a multi-purpose mechanical speedometer for bicycles or tricycles. It is high-quality bicycle engineering made of durable aluminum alloy. Small but light weight, functions as a bike speedometer and odometer, measuring both speed, distance and riding time. Pure mechanical bike code table, not only good quality but also accurate data. It only applies to 26 / 27.5 / 28/29 inch bikes. Check your bike size before purchasing.Our products have complete accessories and are easy to install. The bike speedometer is designed to be old school chrome circle style. Description: Color black. Scope of delivery: 1 piece bicycle speedometer. Main Material: Aluminum Alloy. Item Size:. Approx. (L*W*H). Gross weight: Approx.350g. Package including 1 piece bicycle speedometer