Originally Posted by
SoSmellyAir
A road bike built in 1971 would fit rims with an inner width of 23 mm to 25 mm!?
The rim width would almost never be a problem in and of itself. Tires suitable for such wide rims might occasionally be a close call, but it really depends. A lot of road bikes from that era have fairly healthy clearances. On my '79 Fuji I'm currently using tires that measure 28mm underneath full-length fenders and everything fits just fine within the brake calipers.