this is copy of a velognome post in similar thread http://www.bikeforums.net/classic-vi...ht-decade.html ...it may help

If the rims are original, the tire size would most likely be a 28" tubeless tire with a chain pattern tread. Lots of "non pneumatic" on sale on ebay for static displays. You can purchase actual reproductions from Harper Machine 1329 Dunbar Ave, Dunbar WV the # is 304-768-1147. If this is correct, the rim would measure 25".

Paint on the wood rim was typical of the period. The rim was usually painted to match the frame, the silver or aluminum paint was probably done in the 20's to update the look of the bike to match the then popular steel clad wood rim.