Hey, anybody still watching this thread? Does this mean that any BMX 24x1.75 (ISO 507) tire will fit the rear rim? We just picked up an old 24" single-speed girl's Spyder ('69, I think), and the rear tire is SHOT. It's 24x1.75 rear, 24 x 1 3/8 front. I've gotten the impression that 24"-ers from...