Convert any normal HG freehub wheel into a Singlespeed drive CrMo cog with 7mm thick Hyperglide-spline, 1.8mm tooth thickness Range of different sized aluminum spacers for fine tuning chainline Includes 13t cog, alloy lockring, and 7 spacers: 2) 10mm, 1) 5mm, 4) 3mm 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 Single Speed Kit Description Single Speed Cog and Spacer Kit Hub HG (8-11sp) Teeth 13 Chain 3/32" Color Black