I have got the rear wheel relaced on my Flea and was wondering what the correct tyre size is for them, the one that was on the WM0 rim that I got the rim from was a 2.75 19" is this correct? And if so can anyone reccommend a source of period looking block treads to go on them as most of the ones on ebay are 2.00 or 3.00 in width and I'm having a job finding them.