Originally Posted by
base2
Prompted from above: I didn't find what I was looking for regarding the actual difference between beaded and tubular bead seat diameters. (They are different, btw. (Tubular rims are 632mm. No, Really.))
How are they measuring BSD on tubulars? Seems like middle of the tire bed would make the most sense to me. Slightly surprised it would be that big there though.