Tire Size Chart
| Inch Sizing | ISO / ETRTO (Diameter) |
|---|---|
| 12.5" | 203 |
| 14" | 254 |
| 16" BMX / Kids | 305 |
| 16" Recumbent | 349 |
| 18" BMX / Kids | 355 |
| 18" | 400 |
| 20" BMX / Kids | 406 |
| 20 x 1-3/4" | 419 |
| 20 x 1-3/8", 20 x 1-1/8" | 451 |
| 22" | 457 |
| 22" Wheel Chair | 501 |
| 24" BMX / Kids | 507 |
| 24" BMX Race (Fractional) 24" Road | 520 |
| 24" Old Schwinn S-7 Size | 521 |
| 24" Wheel Chair | 540 |
| 24" Old Schwinn S-5 Size | 547 |
| 26" Mountain | 559 |
| 650c Small Road Bike | 571 |
| 27.5 / 650b | 584 |
| 26 x 1-3/8 | 590 |
| 26" Old Schwinn S-6 | 597 |
| 700c / 29" / 28" | 622 |
| 27" Road (Fractional) | 630 |
| 28" Track Tubular | 635 |
| 36" Big Bike | 787 |