265/70R17 is 1.1″ taller than 245/70R17 on average, going by the heights their makers list (30.5″ vs 31.7″). On paper the gap is 1.10″.
Going from 245/70R17 to 265/70R17.
Lift is half the height difference, since the axle sits at the middle of the tire. The speedometer figure assumes it was set for 245/70R17 and uses the revolutions per mile the makers publish: at an indicated 60 mph you'd be doing 62.2 mph.
| 245/70R17 | 265/70R17 | Difference | |
|---|---|---|---|
| Listed height ″ | 30.10–30.83 | 31.60–32.05 | +1.15 |
| Size code height ″ | 30.50 | 31.61 | +1.10 |
| Height under load ″ | 29.7 | 30.7 | +1.1 |
| Width ″ | 9.65 | 10.43 | +0.79 |
| Listed width ″ | 9.7–9.8 | 10.4–10.8 | +0.9 |
| Sidewall ″ | 6.75 | 7.30 | +0.55 |
| Wheel ″ | 17 | 17 | same |
| Weight lb | 30.5–52.1 | 35.3–59.0 | +5.7 |
| Tread depth /32″ | 10–19 | 11–19 | +0.6 |
| Tires listed | 25 | 57 |
The same model in each size, by the heights the maker lists. Averages where a model comes in several load ranges.
| Tire | 245/70R17 ″ | 265/70R17 ″ | Taller by | Heavier by |
|---|---|---|---|---|
| BFGoodrich Advantage Control HT | 30.55 | 31.65 | +1.10″ | +3.5 lb |
| BFGoodrich All-Terrain T/A KO3 | 30.50 | 31.70 | +1.20″ | +2.0 lb |
| BFGoodrich HD Pro T/A | 30.55 | 31.65 | +1.10″ | +4.3 lb |
| BFGoodrich HD-Terrain T/A KT | 30.60 | 31.70 | +1.10″ | +6.4 lb |
| BFGoodrich Trail-Terrain T/A | 30.50 | 31.60 | +1.10″ | −0.1 lb |
| BFGoodrich Trail-Terrain T/A+ | 30.50 | 31.60 | +1.10″ | +3.9 lb |
| General Grabber A/TX | 30.50 | 31.60 | +1.10″ | +2.5 lb |
| General Grabber APT | 30.50 | 31.60 | +1.10″ | −0.8 lb |
| General Grabber H/T | 30.50 | 31.60 | +1.10″ | +3.3 lb |
| General Grabber HD | 30.50 | 31.60 | +1.10″ | +5.5 lb |
| Michelin Agilis CrossClimate 2 | 30.60 | 31.70 | +1.10″ | +4.7 lb |
| Michelin Defender LTX M/S 2 | 30.10 | 31.60 | +1.50″ | +10.4 lb |
| Michelin X-Ice Snow | 30.55 | 31.65 | +1.10″ | +2.1 lb |
| Toyo M655 | 30.83 | 32.05 | +1.22″ | +7.0 lb |
| Toyo Open Country A/T III | 30.55 | 31.65 | +1.10″ | +6.8 lb |
| Toyo Open Country C/T | 30.79 | 31.89 | +1.10″ | +6.7 lb |
| Toyo Open Country H/T II | 30.55 | 31.65 | +1.10″ | +4.9 lb |
| Toyo Open Country WLT1 | 30.63 | 31.77 | +1.14″ | +5.1 lb |
1.15″ on average, going by the heights tire makers list: 245/70R17 tires are listed at 30.10–30.83″ and 265/70R17 at 31.60–32.05″. The size codes work out to 30.50″ and 31.61″, a 1.10″ difference.
The tire's radius grows by 0.57″, so the axle sits about 0.57″ higher, and the top of the tread comes 0.57″ closer to the fender. 265/70R17 is also 0.79″ wider on paper, 0.39″ per side on the same wheel. Whether it fits depends on your vehicle, lift and wheel offset.
Yes. If it's set for 245/70R17, it will read about 3.7% slow: at an indicated 60 mph you'll be doing 62.2 mph. Worked out from the revolutions per mile the makers publish.
Both fit a 17-inch wheel. Wheel widths approved for both run from 7.0″ to 8.0″.