Convert an XD driver into a Singlespeed drive with a purpose designed kit for gravity full suspension bikes A refined tooth design engages the chain more securely than traditional single speed cogs CNC aluminum sprocket guides act like a chain guide for the rear cog, sandwiching the chain in place Sprocket guides feature a machined mud-shedding pattern which allows dirt to clear out no matter the riding condition Includes cog, alloy lockring, and two sprocket guides To ensure chainline compatibility, Expert XD Single Speed kits must be used with Expert Colab Tensioner TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Model Expert XD Single Speed Kit Description XD Single Speed Kit with Sprocket Guides Hub XD Teeth 13 Chain 12sp Color Black