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ATC Tire Buyer and Sizer
Check out the ATC tire buyer and sizer. General information on Honda ATC tire sizes and a calculator for increasing or decreasing top speed of your ATC through tire sizing only.
ATC250R OEM Tire Sizes
| Model Year |
Front/Rear |
OEM Tire Size |
| 1981 | Rear | 22x11x8 |
| 1982 | Rear | 22x11x8 |
| 1983 | Rear | 22x11x8 |
| 1984 | Rear | 22x11x8 |
| 1985 | Rear | 20x10x9 |
| 1986 | Rear | 20x10x9 |
| 1981 | Front | 22x11x8 |
| 1982 | Front | 22x11x8 |
| 1983 | Front | 23.5x8x11 |
| 1984 | Front | 23.5x8x11 |
| 1985 | Front | 23x8x11 |
| 1986 | Front | 23x8x11 |
How to Modify Top Speed
Let's have some fun... Did you know you can modify the top speed of a Honda ATC250R simply by increasing or decreasing tire diameter? Keep in mind that the front to rear sprcket ratio must be in the stock confguration for these numbers to be accurate.
OK, let's start with the internet's best estimates of OEM top speed according to model year:
| Model Year |
Stock Top Speed |
| 1981 | ~65mph |
| 1982 | ~65mph |
| 1983 | ~74mph |
| 1984 | ~74mph |
| 1985 | ~80mph |
| 1986 | ~83mph |