235/45R17 vs 265/30R19
265/30R19 is 0.07 in (1.7 mm) shorter than 235/45R17, a −0.26% diameter difference. With the speedometer set for 235/45R17, an indicated 60 mph is 59.8 mph on 265/30R19.
Is this a safe swap?
Diameter difference −0.26%: under 1%
By overall diameter alone, 265/30R19 is a near match for 235/45R17; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.
| Measurement | 235/45R17 | 265/30R19 | Difference | % diff |
|---|---|---|---|---|
| Overall diameter | 25.33 in (643.3 mm) | 25.26 in (641.6 mm) | −0.07 in (−1.7 mm) | −0.26% |
| Sidewall height | 4.16 in (105.8 mm) | 3.13 in (79.5 mm) | −1.03 in (−26.2 mm) | −24.82% |
| Section width | 9.25 in (235.0 mm) | 10.43 in (265.0 mm) | +1.18 in (+30.0 mm) | +12.77% |
| Circumference | 79.57 in (2,021.0 mm) | 79.36 in (2,015.6 mm) | −0.21 in (−5.3 mm) | −0.26% |
| Revolutions per mile | 796 | 798 | +2 | +0.26% |
| Indicated | Actual on 235/45R17 | Actual on 265/30R19 | Difference |
|---|---|---|---|
| 30 mph | 30.0 mph | 29.9 mph | −0.1 mph |
| 60 mph | 60.0 mph | 59.8 mph | −0.2 mph |
| 75 mph | 75.0 mph | 74.8 mph | −0.2 mph |
Ride-height change: 265/30R19 lowers the vehicle by 0.03 in (0.9 mm) at the axle (half the −1.7 mm diameter difference).
265/30R19 is 0.07 in shorter than 235/45R17 and 30 mm wider, a 0.26% difference in overall diameter.
With the speedometer calibrated for 235/45R17, an indicated 60 mph is actually 59.8 mph on 265/30R19, and revolutions per mile change from 796 to 798.
265/30R19 mounts on a 19-inch wheel, a plus-2 fitment from the 17-inch wheel of 235/45R17.
Size pages
Other comparisons with 235/45R17
- 195/65R15 vs 235/45R17
- 215/60R15 vs 235/45R17
- 205/65R15 vs 235/45R17
- 225/60R15 vs 235/45R17
- 195/60R16 vs 235/45R17
- 215/55R16 vs 235/45R17
- 235/40R17 vs 235/45R17
- 215/45R17 vs 235/45R17
Other comparisons with 265/30R19
- 255/40R17 vs 265/30R19
- 205/50R17 vs 265/30R19
- 265/40R17 vs 265/30R19
- 215/50R17 vs 265/30R19
- 255/35R18 vs 265/30R19
- 225/40R18 vs 265/30R19
- 265/35R18 vs 265/30R19
- 235/40R18 vs 265/30R19
Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.