BBR Tuning 10T Billet Precision Bearing Idler Sprocket BETTER CHAIN ALIGNMENT: No more chains coming out of alignment or coming out from your idler wheel. This 10 Tooth sprocket locks your chain on your idler with minimal resistance because of the precision high grade bearings. LONG LASTING: The BBR Tuning 10 Tooth Billet Aluminum Pulley Idler is designed to out last those standard plastic pulley wheels and EASY INSTALLATION: Installation is a breeze: uninstall your idler roller from your chain idler pulley, replace with this idler sprocket, install your chain, and you're ready to roll UNIVERSAL FIT: Compatible with 415 heavy duty bicycle engine chains, regular and spring chain tensioner. PACKAGE INCLUDES: 1x BBR Tuning 10 Tooth Billet Aluminum Sprocket with Bearing, 1x Mounting Nut and Bolt with Spacer and washer