CRF50 Training Wheels. Should fit all years CRF50s and XR50s. Not sure about any other bike. I bought them safely ride manufacturing for just over $100. They are adjustable and work great. My son used them for a bit to get used to the controls and we took them off. The brand isn't mxlocker, it just made me pick something for the listing. They're from safely ride manufacturing which wasn't listed as an option.