245/70R18 Tire Size in Inches
A 245/70R18 tire is about 31.5 inches tall and 9.65 inches wide, with a 6.75-inch sidewall, fitted to a 18-inch wheel.
Source: manufacturer documents (listed below) · Updated 2026-11-05 · By CarWhere Research
Calculated nominal dimensions; circumference 99 in. Measured size varies slightly by tire model and rim width.
Vehicles with factory 245/70R18 tires
| Vehicle | Trim | Years |
|---|---|---|
| Toyota 4Runner | 18-inch tires (type A) | 2025, 2026[1],[2] |
Compared with nearby sizes
| Size | Diameter | Difference |
|---|---|---|
| 245/70R18 | 31.5 in | — |
| 245/65R18 | 30.5 in | -3.2% |
| 245/75R18 | 32.5 in | +3.2% |
Width in inches
Check the exact vehicle, not just the model
Trim, package and production changes all move these numbers. Decode the 17-character VIN with the free VIN decoder to confirm the engine and trim, or see the federal engine and MPG specs. Shopping? Browse live inventory and what buyers actually paid.
Frequently asked questions
How tall is a 245/70R18 tire in inches?
About 31.5 inches: a 18-inch wheel plus two 6.75-inch sidewalls (245 × 70% = 171.5 mm each).
How wide is a 245/70R18 tire?
9.65 inches of section width (245 mm ÷ 25.4).
What vehicles come with 245/70R18 tires?
In our manufacturer-sourced data: Toyota 4Runner — trims and years are in the table above.
Sources
- Toyota Motor Sales, U.S.A., Inc., Toyota 2025 4Runner Owner's Manual USA and Canada Only (OM35B85U), 8-1. Specifications, Tires and wheels (accessed 2026-11-05).
- Toyota Motor Sales, U.S.A., Inc., Toyota 2026 4Runner Through May 2026 Prod. Owner's Manual USA and Canada Only (OM35C07U), 8-1. Specifications, Tires and wheels (accessed 2026-11-05).