Originally Posted by
osiris419
Yes OS20 and 22" are the same rim diameter. It's like 700c and 29" same size rim just wider. OS20 uses 20x 13/8" tires and 22" uses 2.1-2.4" tires. One is for racing and one is for street/ park/ trails.
Not quite - 20x 1 3/8 is expert size. Uses the same size wheels as mini BMX racing. I know it's should be the same, but the manufacturers claim that it isn't compatible. I haven't tested whether it is or not. They're labeling the tires as 20x2.1" but marking it OS20. This is because if they call it 22" then it can't be used in BMX class racing, only cruiser.