This integrated hollow crankset tooth plate is firm and wear-resistant, smooth and efficient, lightweight, easy to install and replace.<br/>Features:<br />Aluminum alloy and chrome molybdenum steel are selected for elaborate production, not easy to rust, firm and wear-resistant, and has long service life.<br />The use of lubrication, high efficiency, can effectively drive the chain, riding more labor-saving.<br />Lightweight design, less load, conducive to long-distance riding.<br />Hollow design, effectively reduce the weight, while nice heat dissipation.<br />A variety of crank center distance to choose from, users can choose to matching their own bicycle, repairings and replacement, improve the service life of the bicycle and driving safety.<br/>Specifications:<br />Material: aluminum alloy&#43;chromium molybdenum steel<br />Crank center distance: 170mm / 172.5mm / 175mm (optional)<br />Disc teeth: small disc: 22T, medium disc: 36T<br />Speed: support 9 / 10 / 11 speed <br />Item weight: 800g / 1.8lb<br />Package size: 250 * 100 * 50mm / 9.8 * 3.9 * 2.0in<br />Package weight: 902g / 2.0lb<br/>Packing List:<br />1 * Crankset <br />