The bottom bracket is made of high-quality aluminum alloy, it is lightweight, without heaviness for the bicycle.This set of connecting rods is easy to install and adapts perfectly to the bolt pattern of 104 mm, 32, 34, 36, 38 teeth to choose from. <br> <br> <b>Features:</b><br> ?EASY TO INSTALL?This set of connecting rods is easy to install and adapts perfectly to the bolt pattern of 104 mm, 32, 34, 36, 38 teeth to choose from. <br> ?INCREASES WEAR LIFE?Bike single chainring adopts standard teeth design, which ensures ultimate chain retention, increases wear life, and reduces friction and noise.<br> ?HIGH STRENGTH & LIGHTWEIGHT?The bottom bracket is made of high-quality aluminum alloy, it is lightweight, without heaviness for the bicycle.<br> ?BIKE REPLACEMENT ACCESSORY?Integrated structure, offers a good occlusion with your bicycle chain. An great replacement for bike repair.<br> <br> <b>Specification:</b><br> Condition: 100% Brand New and High Quality<br> Material: Aluminum Alloy<br> Color: Black, Red (optional)<br> BCD: 104mm<br> Teeth: 32, 34, 36, 38 (optional)<br> Weight: Approx. 50-73g<br> <br> <b>Package Included: </b>  <br> 1 x Bike Chain Ring Only<br>