What's the Max Tire Size on a Stock 2nd Gen 4Runner?
Straight answer: on a completely stock 2nd gen 4Runner (1990–1995), the practical maximum is a 31x10.50R15 — and even that may lightly rub the front mud flaps or fender liner at full steering lock. The truly zero-rub ceiling on stock suspension is a 30x9.50R15 or the metric 265/75R15. Factory size, for reference, is 225/75R15.
Why 31s Are the Stock Limit
The limiting spots are the front wheel wells: the forward fender liner and mud flap area at full lock, and the torsion bar/lower control arm zone under compression. A 31x10.50 fills the well almost completely — most trucks live happily with them after trimming the mud flaps, but a heavy wheel offset or aggressive tread can turn 'almost' into a rub. Wheel spec matters too: stock-ish backspacing on a 15x7 or 15x8 keeps a 31 out of the suspension; a wrong-offset wheel can create rubbing that the tire size alone wouldn't.
Want 33s? That's a Lift Conversation
The popular 33-inch range (33x10.50 or 285/75R16) needs roughly 3 inches of lift plus minor trimming to work properly — which is exactly what our complete 3" lift kit is built for. Our lift and tire-fitment guide covers the full size-by-size breakdown, and our no-rub tire guide lists specific tires owners run successfully at each level.
The Honest Recommendation
If you're staying stock: a quality 30x9.50 or 265/75R15 all-terrain gives you a taller, more capable tire with zero drama and no speedometer correction worth worrying about. If you want to fill the wells: 31x10.50R15, trim the flaps, and accept possible faint rub at full lock. If you're dreaming of 33s: lift it and do it right — stuffing oversized tires on stock suspension costs you turning radius, rubs through liners, and wears out your already-tired front end faster.
