Used Schwinn Pro Stock frame. Has 21.25" top tube from center to center measured along the top tube. Bought on here awhile back as a project. Was going to strip it because the paint is sh*tty. Ended up picking up a slightly longer Matt Polkhamp Pro Mod frame instead, so don't need this one. Will pass project on. Other than the paint and no tensioners the frame is in good shape. Any questions, just PM me. Thanks for looking!