十进制 ISO
26 x 1.00 through 2.3...559 mm
26 x 1.25 (rare)........599 mm
26 x 1.375..............599 mm
24 x 1.5-24 x 2.125.....507 mm
22 x 1.75, 22 x 2.125...457 mm
20 x 1.5-20 x 2.125.....406 mm
18 x 1.5 ...............355 mm
18 x 1.75-18 x 2.125....355 mm
16 x 1.75-16 x 2.125....305 mm