Figuring out your classic tire size and its conversion is a hassle — decipher the size information and make the selection of the replacement tires much easier.
Below is a comprehensive list of Radials, Poly/Fibers, Bias-Ply’s, Cheater Slicks and Dragster Slicks with each original tire size listed, and each of the related measurements is charted.
How to Measure Tire Size
Classic and Race Tire Size Conversion Chart
Editor’s Note: Due to the amount of information presented, the table below scrolls horizontally.
| Tire Type | Tire Size | Tread Width | Section Width | Overall Diameter | Construction | Max Load | Min Rim Width | Max Rim Width | Tube / Tubeless |
|---|---|---|---|---|---|---|---|---|---|
| Radial | 165R15 | 4.60 | 6.50 | 25.20 | Poly/Steel | 1120 lbs | 4.50 | 6.00 | Tubeless |
| Radial | 185R15 | 4.75 | 7.28 | 27.00 | Poly/Steel | 1355 lbs | 5.00 | 6.50 | Tubeless |
| Radial | 185/65R15 | 5.50 | 7.44 | 24.45 | Poly/Steel | 1168 lbs | 5.00 | 6.50 | Tubeless |
| Radial | 205/65R15 | 6.10 | 8.23 | 25.47 | Poly/Steel | 1400 lbs | 5.50 | 7.50 | Tubeless |
| Radial | 205/75R15 | 5.80 | 8.00 | 27.10 | Poly/Steel | 1400 lbs | 5.00 | 7.00 | Tubeless |
| Radial | 215/65R15 | 6.40 | 8.70 | 26.02 | Poly/Steel | 1510 lbs | 5.50 | 7.50 | Tubeless |
| Radial | 215/70R15 | 6.40 | 8.70 | 26.90 | Poly/Steel | 1620 lbs | 5.50 | 7.50 | Tubeless |
| Radial | 225/70R15 | 6.70 | 9.00 | 27.40 | Poly/Steel | 1753 lbs | 6.00 | 8.00 | Tubeless |
| Radial | 235/70R15 | 7.00 | 9.50 | 28.00 | Poly/Steel | 1896 lbs | 6.00 | 8.50 | Tubeless |
| Radial | 235/75R15 | 7.00 | 9.50 | 28.00 | Poly/Steel | 1896 lbs | 7.00 | 8.00 | Tubeless |
| Radial | 255/70R15 | 7.60 | 10.20 | 29.10 | Poly/Steel | 2183 lbs | 6.50 | 9.00 | Tubeless |
| Polyester/Fiberglass | F60-15 | 8.80 | 9.20 | 25.90 | Poly/Fiberglass | 1500 lbs | 7.00 | 8.00 | Tubeless |
| Polyester/Fiberglass | F70-15 | 6.50 | 8.30 | 26.90 | Poly/Fiberglass | 1500 lbs | 5.50 | 8.00 | Tubeless |
| Polyester/Fiberglass | G70-15 | 6.70 | 8.50 | 27.50 | Poly/Fiberglass | 1620 lbs | 5.50 | 8.00 | Tubeless |
| Polyester Bias-Ply | 5.00-15 | 4.10 | 5.60 | 24.85 | Polyester | 675 lbs | 4.00 | 5.00 | Tubeless |
| Polyester Bias-Ply | 5.60-15 | 3.80 | 5.96 | 25.79 | Polyester | 970 lbs | 4.00 | 5.50 | Tubeless |
| Polyester Bias-Ply | 6.70-15 | 4.50 | 7.01 | 28.58 | Polyester | 1450 lbs | 5.00 | 6.00 | Tubeless |
| Polyester Bias-Ply | 7.10-15 | 4.50 | 7.70 | 28.88 | Polyester | 1550 lbs | 5.50 | 7.00 | Tubeless |
| Polyester Bias-Ply | 8.20-15 | 5.00 | 8.35 | 29.56 | Polyester | 1920 lbs | 6.00 | 7.00 | Tubeless |
| Polyester Bias-Ply | 14/31-15 | 14.00 | 17.00 | 31.00 | Polyester | 1565 lbs | 13.00 | 16.00 | Tubeless |
| Polyester Bias-Ply | 4.50/4.75-16 | 3.80 | 4.75 | 26.20 | Polyester | 660@3Opsi | 2.75 | 5.00 | Tube |
| Polyester Bias-Ply | 5.00-16 | 4.10 | 5.90 | 25.85 | Polyester | 760 lbs | 4.00 | 5.00 | Tubeless |
| Polyester Bias-Ply | 6.00-16 | 4.63 | 6.26 | 28.56 | Polyester | 1400@32psi | 4.00 | 4.50 | Tube |
| Polyester Bias-Ply | 6.50-16 | 5.10 | 7.00 | 29.10 | Polyester | 1580@32psi | 4.50 | 5.00 | Tube |
| Polyester Bias-Ply | 6.70-16 | 4.75 | 6.77 | 28.62 | Polyester | 1130@3Opsi | 4.50 | 5.00 | Tube |
| Polyester Bias-Ply | 7.00-16 | 5.40 | 7.60 | 30.40 | Polyester | 1900@36psi | 4.50 | 5.50 | Tube |
| Polyester Bias-Ply | 7.50-16 | 4.90 | 7.40 | 31.00 | Polyester | 1660@4Opsi | 5.00 | 6.00 | Tube |
| Polyester Bias-Ply | 8.90-16 | 6.75 | 8.89 | 30.94 | Polyester | 1400 lbs | 6.00 | 8.50 | Tubeless |
| Polyester Bias-Ply | 8.20-18 | 6.25 | 8.80 | 33.00 | Polyester | 1415 lbs | 6.00 | 8.50 | Tubeless |
| Cheater Slicks | 7.75-14 | 7.00 | 8.50 | 26.50 | Polyester | 1450 lbs | 5.50 | 8.00 | Tubeless |
| Cheater Slicks | 7.75-15 | 7.00 | 8.50 | 26.50 | Polyester | 1500 lbs | 5.50 | 8.00 | Tubeless |
| Cheater Slicks | 8.20-15 | 8.50 | 10.70 | 30.50 | Polyester | 1920 lbs | 7.00 | 8.00 | Tubeless |
| Cheater Slicks | 10.00-15 | 9.50 | 12.00 | 30.20 | Polyester | 1960 lbs | 8.00 | 10.00 | Tubeless |
| Cheater Slicks | 8.20-16 | 8.50 | 10.70 | 30.50 | Polyester | 1920 lbs | 7.00 | 8.00 | Tubeless |
| Cheater Slicks | 10.00-16 | 9.50 | 12.00 | 30.20 | Polyester | 1960 lbs | 8.00 | 10.00 | Tubeless |
| Radir Dragster Slicks | 9.00-15 | 9.00 | 12.50 | 32.00 | Polyester | 1830 lbs | 7.00 | 12.00 | Tubeless |
| Radir Dragster Slicks | 10.00-15 | 10.00 | 13.00 | 29.25 | Polyester | 1900 lbs | 8.00 | 12.00 | Tubeless |
| Radir Dragster Slicks | 12.00-15 | 12.00 | 15.00 | 32.00 | Polyester | 1950 lbs | 10.00 | 15.00 | Tubeless |
| Radir Dragster Slicks | 9.00-16 | 9.00 | 12.50 | 32.00 | Polyester | 1830 lbs | 7.00 | 12.00 | Tubeless |
| Radir Dragster Slicks | 12.00-16 | 12.00 | 15.00 | 32.00 | Polyester | 1950 lbs | 10.00 | 15.00 | Tubeless |
| Excelsior Radial | 600R16 | 4.60 | 6.50 | 28.00 | Poly/Steel | 1400@35Psi | 4.00 | 5.00 | Tubeless |
| Excelsior Radial | 650R16 | 4.90 | 6.90 | 28.80 | Poly/Steel | 1580@35psi | 4.00 | 6.00 | |
| Excelsior Radial | 700R16 | 5.20 | 7.80 | 29.10 | Poly/Steel | 1650@35psi | 4.00 | 6.00 | Tubeless |
| Excelsior Radial | 550R18 | 4.40 | 5.50 | 28.50 | Poly/Steel | 1279@44psi | 4.00 | 5.00 | |
| Excelsior Radial | 700R18 | 4.40 | 5.50 | 28.50 | Poly/Steel | 1279@44psi | 4.00 | 5.00 | Tubeless |
| Tire Type | Tire Size | Tread Width | Section Width | Overall Diameter | Construction | Max Load | Min Rim Width | Max Rim Width | Tube / Tubeless |
