Tire fitment
The 2026 Toyota 4Runner base tire size is 245/70R17 — 245 mm wide with a 70% aspect ratio on 17″ rims. 3 OEM sizes are available across trims.
2026 Toyota 4Runner
245/70R1730.5″ overall diameter · 171.5 mm sidewall · ~661 rev/mi
| Trim | Tire size | Rim | Diameter | vs Base |
|---|---|---|---|---|
| SR5 ★ | 245/70R17 | 7×17″ | 30.5″ (774.8 mm) | — |
| TRD Off-Road/Limited | 265/70R18 | 7.5×18″ | 32.6″ (828.2 mm) | +6.89% |
| Platinum | 265/55R20 | 8×20″ | 31.5″ (799.5 mm) | +3.19% |
The 2026 Toyota 4Runner ships with 245/70R17 tires on the base trim — that's an overall diameter of 30.5″. The 245 mm width and 70% sidewall ratio give you 171.5 mm of sidewall cushion between the rim and the road.
Match the load index and speed rating from your door-jamb placard — not just the size. If you're switching sizes, keep the overall diameter within ~3% to avoid speedometer error and potential ABS/traction-control issues.
Factory fitment for the 2026 Toyota 4Runner; verify against your door-jamb placard or owner's manual.
The base 2026 Toyota 4Runner uses 245/70R17 tires — 245 mm wide, 70% aspect ratio, on 17-inch rims. The overall diameter is 30.5″ (774.8 mm). Higher trims use different sizes — see the table above. Confirm against your door-jamb placard.
Yes, within limits. Keep the overall diameter within about 3% of 30.5″ to avoid speedometer error and clearance issues. A wider tire may improve grip, but match the load and speed ratings your 4Runner requires.
245/70R17 tires have an overall diameter of 30.5″ (774.8 mm), with a 171.5 mm sidewall height. That's about 661 revolutions per mile.
The 2026 Toyota 4Runner tire sizes shown are OEM factory fitments. Confirm your exact tire size, load rating, and speed rating against the door-jamb placard or owner's manual before buying tires.