‘Perhaps when you decide to retire the Rudge wheels, you could pressurize fat tyres on them progressively until they split the rims and let us know.’
The bike has Araya rims, about 15mm or 17mm id I would guess, and stamped on them is 26 x 1.50 as the tyre size to use. The old 1.50 tyres have a MAX pressure rating of 40psi - incredibly low compared with a modern tyre of that size - and it makes me wonder how much pressure the rims were designed for. Particularly after reading Martinf’s post. I have a pair of little used 1.50 Marathon plus tyres on their way to me which have a minimum pressure of 55psi so might not have been the best choice!
