225/65R17 tire size
A 225/65R17 tire is about 28.5 in tall and 8.9 in wide, for a 17 in wheel. Its sidewall is 225 × 65% = 146.2 mm (5.76 in).[1 · Oct 29, 2026][2 · Oct 29, 2026]
The code means: 225 mm section width, sidewall 65% of the width, radial construction, 17 in wheel.
225/65R17 compared with nearby sizes
| Swap | Overall diameter | Difference | True speed at an indicated 60 mph | Ride height change | vs the 3% guideline |
|---|---|---|---|---|---|
| 225/65R17 → 235/65R17 | 28.52 → 29.03 in | +1.8% | 61.1 mph | +0.26 in | Within 3% |
| 225/65R17 → 225/60R17 | 28.52 → 27.63 in | -3.1% | 58.1 mph | -0.44 in | Over 3% |
| 225/65R17 → 235/60R18 | 28.52 → 29.10 in | +2.1% | 61.2 mph | +0.29 in | Within 3% |
| 225/65R17 → 225/60R18 | 28.52 → 28.63 in | +0.4% | 60.2 mph | +0.06 in | Within 3% |
| 225/65R17 → 245/65R17 | 28.52 → 29.54 in | +3.6% | 62.2 mph | +0.51 in | Over 3% |
The math (our own arithmetic): sidewall height = width × aspect ratio ÷ 100; overall diameter = rim × 25.4 + 2 × sidewall (mm), ÷ 25.4 for inches; revs per mile = 63,360 ÷ (π × diameter in inches); true speed = indicated speed × new diameter ÷ original diameter. These are nominal figures from the size code. Tire Rack notes that real tires differ from the formula, so use the tire maker's published spec when clearance is tight.[2 · Oct 29, 2026]
Keeping within about 3% of the original diameter is the guideline BFGoodrich and Continental give.[3 · Oct 29, 2026][4 · Oct 29, 2026] Load index and speed rating must also meet or exceed the original tires.[4 · Oct 29, 2026]
Is 225/65R17 right for my vehicle?
Check the Tire and Loading Information label on the driver's door edge or the owner's manual. NHTSA says to use the size the vehicle maker specifies or another size it recommends.[5 · Oct 29, 2026] We don't list which vehicles use this size because fitment varies by trim and wheel option.
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Sources: 1. Tire Industry Association, Reading a tire sidewall. 2. Tire Rack, How do I calculate tire dimensions?. 3. BFGoodrich, Changing tire size. 4. Continental Tire, PSIB 06-03: Tire plus-sizing for passenger and light truck vehicles (PDF, 2006). 5. NHTSA, Tires. Checked Oct 29, 2026. Size dimensions, revolutions per mile and speedometer figures are our own arithmetic from the size code. Trademarks belong to their owners; figures are restated in our own words and tables, not reproduced.