1991 Toyota 4Runner — 4wd
The 1991 Toyota 4Runner 4wd shipped with 2 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
225/75R15
| Section width | 225 mm |
|---|---|
| Aspect ratio (sidewall height) | 75% (168.8 mm) |
| Rim diameter | 15" |
| Overall tire diameter | ~28.3" |
| Revolutions per mile | ~713 |
Compare prices at:
31X10.50R15
| Overall diameter | 31" |
|---|---|
| Section width | 10.5" |
| Rim diameter | 15" |
| Revolutions per mile | ~651 |
Compare prices at:
What this size means for your Toyota 4Runner
On the 1991 Toyota 4Runner 4wd, the factory 225/75R15 measures about 28.3″ in overall diameter with a 168.8 mm (6.6″) sidewall, and completes roughly 713 revolutions per mile. Its 75-series aspect ratio gives a tall sidewall of the kind used on trucks, SUVs, and older passenger cars, built for cushioning and load. In tire terms it is a passenger (P-metric / Euro-metric) size.
Because the 1991 Toyota 4Runner predates many current tire lines, confirm this size is still stocked before ordering — some vintage fitments are now served mainly by specialty and classic-car tire suppliers.
Other 1991 Toyota 4Runner trims
- 2wd 225/75R15
Toyota 4Runner tire sizes by year
- 2026 Toyota 4Runner 265/55R20
- 2025 Toyota 4Runner 265/55R20
- 2024 Toyota 4Runner 245/60R20
- 2023 Toyota 4Runner 265/70R17
- 2022 Toyota 4Runner 245/60R20
- 2021 Toyota 4Runner 245/60R20
- 2020 Toyota 4Runner 245/60R20
- 2019 Toyota 4Runner 245/60R20
- 2018 Toyota 4Runner 245/60R20
- 2017 Toyota 4Runner 245/60R20
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.