Jeep Wrangler JK Unlimited biggest tire size: stock and lifted
The biggest tire owners run on a Jeep Wrangler JK Unlimited at every lift height, with the trimming it takes, the wheel specs you need and the lift kits that get you there.
33s. JK-Forum owners agree that most 285/70R17s (about 33 inches) fit on stock wheels, at stock height, with the stock bump stops. Expect light rubbing at full lock and at full flex, where they touch the flares, liners and sometimes the front sway bar. A steering-stop washer and the right backspacing help. ExtremeTerrain says 35s need at least a 2–3-inch lift, the right wheel offset and possibly new gears.
Biggest Jeep Wrangler JK Unlimited tire at every lift
| LIFT | BIGGEST TIRE | WHAT IT TAKES |
|---|---|---|
| Stock | 33 in (e.g. 285/70R17) | JEGS puts the stock-height limit at about 33 in. Driving Line fitted 35x12.50R17s to a stock-height 2017 JK Unlimited Sport on 4.75 in-backspacing wheels after removing the front splash guard, and concluded that real off-road use needs aftermarket or heavily trimmed flares. |
| 2.5 in | 35x12.50 or 285/75R17 | 285/75R17 works on factory 17s; 35x12.50 wants 18x9 or 20x9 wheels at about 0 to +1 mm offset. |
| 3.5 in | 37 in | JEGS says 37s need about 3.5 in of lift and advises axle, driveshaft and gearing upgrades; 40s need about 4.5 in. |
Jeep Wrangler JK Unlimited wheel and tire specs
| Factory tire sizes | P225/75R16 (X/Sport) · P245/75R16 (option) · P255/75R17 (Sahara) · P255/70R18 (Sahara option) · LT255/75R17 BFGoodrich Mud-Terrain (Rubicon) |
|---|---|
| Bolt pattern | 5x127 (5x5") |
| Center bore | 71.5 mm |
| Lug thread | 1/2"-20 (60° cone seat) |
| Lug-nut torque | 100 lb-ft (Northridge4x4); ExtremeTerrain gives an 85–125 lb-ft range confirm in manual |
Lift kits, wheels and tires for the Jeep Wrangler JK Unlimited
2.5–3.5 inches with matched coils and shocks clears 35s and can be specced for a loaded overland truck. Correct the track-bar and control-arm geometry, or death wobble will remind you.
Regear after going to 35s, especially on 3.8 trucks. Then truss the front, or replace it with something stronger.
A winch-ready steel front bumper is the usual first armor buy. Count its weight against the payload.
Fitment comes from owners and specialists; wheel width, offset, trimming and bump stops change what fits. Check clearance at full lock and full flex before you buy. Some links are affiliate links.