BBR Super-strong stainless steel spokes are a must have for the adults (and fast kids) riding the CRF/XR50 / TT-R50 / DRZ70. For use with aluminum 12 inch rims. For use with stock front or rear hubs along with BBR billet rear disc brake hub to build 12 inch wheel assembly. BBR HD stainless spoke sets are a key component for building strong and durable wheel sets. Large-diameter stainless steel spokes and nipples. Help eliminate broken spokes and hubs. Each kit contains enough spokes for one wheel. Requires drilling of stock hub. Spoke wrench included. Requires drilling spoke holes of stock hub for installation. Use 3/16'(0.18750') drill size