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Will 37-inch tires fit a Jeep Gladiator Rubicon?
Fitment answer · Updated October 27, 2026
Short answer
With a lift, yes. Most Gladiator Rubicon owners fitting 37s use around a 2.5 to 3.5-inch lift, bump stops sized for the tire and low-backspacing wheels. The Rubicon's higher fenders help clearance.
Shop the gear for this build ↓ Tires, deflators and a compressor picked for this setup.
What you usually need
- A 2.5 to 3.5-inch lift.
- Bump stops sized for 37s.
- Wheels with about 4.5-inch backspacing or less, plus an alignment.
Regearing
Gladiator Rubicons have 4.10 gears; with 37s, many owners regear to 4.88 or 5.13, especially if towing. 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.
- Digital tire pressure gauge — For airing down and back up accurately.
- Staun tire deflators — Repeatable trail pressures.
- VIAIR 88P portable compressor — Air back up before the highway.
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FAQ
Can a stock Gladiator Rubicon run 37s?
Not well; most add a lift.
Do I need to regear?
Usually yes.
Do I need new flares?
Rubicon fenders help, but check full-flex clearance.
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: 35s on a Gladiator JT · 33s on a stock Gladiator JT · 37s on a Gladiator JT · 35s on a 2.5" Gladiator · 37s on a 3.5" Gladiator · 35s on a stock Mojave · 35s on a stock Gladiator Rubicon · 33s on a leveled Gladiator
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