dioche bike crankset, bike crank arm set, aluminium alloy bike single speed crankset, left and right crank arms repair parts for mountain bike, road bike (1 pair). dioche features: <br> 1. aluminium alloy material, hollow design, durable and lightweight<br> <br> 2. high strength and deformation resistance<br> <br> 3. fine machining, extends your bike's life and reduces friction and noise <br> <br> <br> <br> <br> specification:<br> material: aluminium alloy <br> color options: black; silver <br> bcd: 130 mm (suitable for 107-100mm)<br> arm length: 170 mm/ 6.7 inch <br> fit for: pedal diameter = 9/16 <br> weight: approx. 555 g <br> <br> <br> package list: <br> 1 * pair of crank arms <br> <br>