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Will 40-inch tires fit a TJ Wrangler with a 6-inch lift?
Fitment answer · Updated October 27, 2026
Short answer
Only as a heavy build. A 6-inch TJ can clear 40s with long arms, tube fenders and 1-ton axles; on stock Dana 30/44 or Dana 35 axles it is not a good idea.
Shop the gear for this build ↓ Tires, deflators and a compressor picked for this setup.
What you usually need
- Long-arm suspension.
- Tube or flat fenders.
- 1-ton axles.
- Hydraulic-assist steering.
Regearing
40s call for 5.38 or lower gears. Compare ratios in the Tire & Gear Calculator before you buy gears.
Compare
Gear for this build
- Mud-terrain tires (search) — Louder on the highway; buy for real mud use.
- Staun tire deflators — Repeatable trail pressures.
- VIAIR 88P portable compressor — Air back up before the highway.
- YUNPEAK 1.26" × 30' kinetic recovery rope — Bigger tires, bigger trails: carry recovery gear.
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FAQ
Do 40s fit a TJ Wrangler with a 6-inch lift?
Only as a heavy build.
Can a 6-inch TJ run 40s?
With a full axle and steering build.
Do I need to regear?
40s call for 5.38 or lower gears.
Check your numbers
Use the free Tire & Gear Calculator to see speedometer error, highway RPM and a regear target, or ask TekJeep AI on the homepage with your year, trim, lift and wheel specs.
Related guides: All-terrain & mud-terrain tires · JK 2.5" lift overview
More fitment answers: 33s on a TJ Wrangler · 35s on a TJ Wrangler · 31s on a stock TJ · 33s on a 2" TJ · 35s on a 3" TJ · 33s on a stock TJ Rubicon · 35s on a TJ Rubicon · 35s on a 2" TJ
Fitment disclaimer: Clearance depends on exact tire size, wheel specs, suspension and how hard you flex. Confirm with your tire shop or installer before buying.
Tire size how-tos: How to read a tire size · Bolt pattern & backspacing · Regearing for bigger tires · Tire pressure after upsizing · Speedometer error · Rubbing fixes