On a fully loaded touring bike I could get around 1000 miles before the rear tire was bald. Once bald I would get flats on a consistent basis. Folding bikes have smaller diameter tires, hence they wear faster than 700C or 26" tires. However recreational riding is not the same as loaded touring. I estimate a standard 20" folding bike can go around 1000 miles before it needs replacement. What are your experiences?