Hello to one and all, As the title says I have an old Marlboro 5 speed gents bike which is worthless but as i have an aversion to scrapping or dumping old bikes i would rather reuse them when possible. The tyres are so old that all markings and sizes have disappeared and i have no way identifying the size i need. The only measurement i have is when i stand the bare rim up and measure from the ground to the top the overall diameter is 610mm ouside edge to outside edge. What size tyre am i looking for to suit that wheel could anyone tell me? What size wheel does that record as? With so many variations of wheels and tyres there now it is off the internet i shall end up buying so id like to get it as near as i can to the right size. Thank you in advance.