245/70R17 Tire Size: 30.5" Tall, a 31-Inch Tire
Straight answer
A 245/70R17 stands 30.5 inches tall and 9.6 inches wide on a 17-inch wheel, which makes it a 31-inch tire in truck-speak. NTW stocks 11 tire models in this size right now.
245/70R17 dimensions
Overall diameter
30.50"
Section width
9.65"
Sidewall height
6.75"
Wheel diameter
17"
Circumference
95.8"
Revolutions per mile
661
≈ 30.5x9.6R17 flotation. Nominal math; real tires run a few tenths off depending on brand, load range, rim width, and air pressure.
What 245/70R17 means
- 245Section width: 245 mm (9.6") wall to wall
- 70Aspect ratio: sidewall is 70% of the width, so 6.8" tall
- RRadial construction
- 17Fits a 17-inch wheel
Want the full rundown on sidewall codes, load index, and speed rating? Read how to read a tire size.
245/70R17 compared to nearby 17-inch sizes
Speedometer column assumes your truck is calibrated for 245/70R17 and reads 65 mph.
| Size | Height | vs 245/70R17 | Width change | Actual speed | Compare |
|---|---|---|---|---|---|
| 245/65R17 | 29.5" | -1.0" (-3.2%) | 0.0" | 62.9 mph | Full comparison |
| 265/65R17 | 30.6" | +0.1" (+0.2%) | +0.8" | 65.1 mph | Full comparison |
| 245/75R17 | 31.5" | +1.0" (+3.2%) | 0.0" | 67.1 mph | Full comparison |
| 265/70R17 | 31.6" | +1.1" (+3.6%) | +0.8" | 67.3 mph | Full comparison |
| 235/80R17 | 31.8" | +1.3" (+4.3%) | -0.4" | 67.8 mph | Full comparison |
Rule of thumb: inside 3% of stock diameter feels stock; past 8 to 10% and most owners budget for a re-gear. Run your exact numbers in the tire size calculator, or check what stepping down to 245/65R17 does.
Trucks that come with 245/70R17
- Jeep Grand Cherokee (2005–2025) · 2011–2025: Laredo, Laredo E, Laredo A
- Toyota Tacoma (2005–2026) · 2024–2026: SR, SR5
- Toyota 4Runner (2003–2026) · 2026: SR5
- Ram 2500 (2011–2026) · 2011–2026: Tradesman, ST, Big Horn and others
- GMC Sierra 1500 (2007–2026) · 2007–2013: SLE, WT, SLT and others
- Chevrolet Silverado 2500 HD (2007–2026) · 2015–2019: WT, LT
- Chevrolet Silverado 1500 (2007–2026) · 2007–2018: LT, WT, LTZ and others
- Ford F-150 (2004–2026) · 2009–2026: XL, XLT, SSV and others
Tires in stock in 245/70R17
11 models, 16 SKUs at NTW (different load ranges and sidewall styles). Refreshed daily.
| Tire | Type | Options | From |
|---|---|---|---|
| Falken Wildpeak A/T4W | All Terrain | 2 | $254 |
| Nitto Terra Grappler G3 | All Terrain | 2 | $245 |
| Toyo Open Country A/T III | All Terrain | 2 | $250 |
| Toyo Open Country C/T | All Terrain | 2 | $300 |
| Toyo Open Country H/T II | All Terrain | 2 | $217 |
| Bfgoodrich All-Terrain T/A KO3 | All Terrain | 1 | $259 |
| BFGoodrich HD All Terrain KT | All Terrain | 1 | $299 |
| Bfgoodrich Trail-Terrain T/A+ | All Terrain | 1 | $228 |
| Falken Rubitrek A/T | All Terrain | 1 | $204 |
| Nitto Nomad Grappler AT | All Terrain | 1 | $210 |
| Toyo Celsius Cargo | All Terrain | 1 | $227 |
Prices per tire at NTW when last checked; confirm at checkout.
Frequently Asked Questions
How tall is a 245/70R17 tire in inches?+
A 245/70R17 is 30.50 inches tall and 9.65 inches wide, with a 6.75-inch sidewall on a 17-inch wheel. Real mounted tires vary a few tenths of an inch by brand, load range, and rim width.
Is 245/70R17 a 31-inch tire?+
Close enough that everybody calls it one. It measures 30.5 inches, so it's sold and talked about as a 31. The flotation equivalent is 30.5x9.6R17.
What does 245/70R17 mean?+
245/70R17 means a tire 245 millimeters wide with a sidewall 70% as tall as it is wide, built for a 17-inch wheel.
245/70R17 vs 245/75R17: how much bigger?+
245/75R17 is 1.0 inches taller (3.2%) and 0.0 inches wider. Going from 245/70R17 to 245/75R17, a speedometer reading 65 mph means you're actually doing 67.1.
Looking for another size? See the full truck tire size chart.