These were installed on a bike in store then it was parted out. 1-1/8" steer tube, 3/8" drop outs, 180mm steer tube length. Good replacement for an entry level bmx that needs new ones, or just to get one rolling again. They are on our used parts section on our website along with other deals on used parts and check out our sale section for deals on new parts and bikes. www.san-pen-bmx.ca We also now offer local delivery. Contact for details.