20-inch tire sizes
12 sizes fit a 20-inch rim, from 30.43 to 35.10 inches tall.
265/50R2030.43″ × 10.43″275/55R2031.91″ × 10.83″285/55R2032.34″ × 11.22″265/60R2032.52″ × 10.43″295/55R2032.78″ × 11.61″275/60R2032.99″ × 10.83″305/55R2033.21″ × 12.01″285/60R2033.46″ × 11.22″295/60R2033.94″ × 11.61″275/65R2034.07″ × 10.83″285/65R2034.59″ × 11.22″295/65R2035.10″ × 11.61″
All 20-inch sizes compared
| Size | Diameter | Width | Sidewall | Revs/mile |
|---|---|---|---|---|
| 265/50R20 | 30.43 in | 10.43 in | 5.22 in | 663 |
| 275/55R20 | 31.91 in | 10.83 in | 5.95 in | 632 |
| 285/55R20 | 32.34 in | 11.22 in | 6.17 in | 624 |
| 265/60R20 | 32.52 in | 10.43 in | 6.26 in | 620 |
| 295/55R20 | 32.78 in | 11.61 in | 6.39 in | 615 |
| 275/60R20 | 32.99 in | 10.83 in | 6.50 in | 611 |
| 305/55R20 | 33.21 in | 12.01 in | 6.60 in | 607 |
| 285/60R20 | 33.46 in | 11.22 in | 6.73 in | 603 |
| 295/60R20 | 33.94 in | 11.61 in | 6.97 in | 594 |
| 275/65R20 | 34.07 in | 10.83 in | 7.04 in | 592 |
| 285/65R20 | 34.59 in | 11.22 in | 7.29 in | 583 |
| 295/65R20 | 35.10 in | 11.61 in | 7.55 in | 575 |
Nominal dimensions from the official sizing formula (sources below).
Printed from https://tiresizecalc.net/rim/20-inch/. Figures as published on 2026-11-01. The sources are listed below.
Sources
- UN Regulation No. 30 - Uniform provisions concerning the approval of pneumatic tyres for motor vehicles and their trailers (Revision 3). United Nations Economic Commission for Europe (UNECE). E/ECE/324 E/ECE/TRANS/505 Rev.1/Add.29/Rev.3. 2007-03-29. Para 2.15 and 6.1.2.1: aspect ratio and outer diameter, D = d + 2H. Retrieved 2026-11-01.
- UN Regulation No. 54 - Uniform provisions concerning the approval of pneumatic tyres for commercial vehicles and their trailers (Revision 2). United Nations Economic Commission for Europe (UNECE). E/ECE/324 E/ECE/TRANS/505 Rev.1/Add.53/Rev.2. 2004-04-16. Para 6.1.2.1: the same formula for light truck tires. Retrieved 2026-11-01.
- UN Regulation No. 30 - Uniform provisions concerning the approval of pneumatic tyres for motor vehicles and their trailers (Revision 3). United Nations Economic Commission for Europe (UNECE). E/ECE/324 E/ECE/TRANS/505 Rev.1/Add.29/Rev.3. 2007-03-29. Para 6.1.5: allowed outer diameter, Dmin = d + 2H x 0.97, Dmax = d + 2H x 1.04. Retrieved 2026-11-01.
- Computed by tiresizecalc.net from the cited formula. Sri Murugan Systems. Circumference = pi x diameter; revolutions per mile = 63,360 / circumference; 1 in = 25.4 mm exactly. Retrieved 2026-11-01.
Last reviewed 2026-11-01. The full source list, with dates and file checksums, is in How the numbers are calculated. To report an error, email contactus@tiresizecalc.net.