Originally Posted by jpmartineau
Can anyone tell me the ISO tire size for a 20x1 BMX tire?
The number looks something like 37-438 (different numbers) and its written on the tire's sidewall...
BMX 20 in. tires are 406, so the tire size would be 25-406. I've never seen them that narrow before.
I did a quick internet search and found no 406s that narrow. Schwalbe and a few others have some as narrow as 28-406.
Beware, some wheelchair tires (and possibly foreign bikes) have "20 x 1" size but these are 23-451 and they WILL NOT fit a BMX rim.
Last edited by dwilbur3; 12-30-09 at 05:20 PM.
Reason: Looked around a little.