Something with an effective top tube of about 51cms, give or take. Young lad wants a road bike and I have enough spares to throw on a frame set. Likely he will out grow it in less than two years so not looking for a keeper. thanks.
Not free, but... Art Cycle Studio on Rakuten do a small frame 46.5 with a 51.5 top. You will have to phone them probably to negotiate just the frame. Though a whole bike with the lowest spec is pretty cheap.