← Back to TekJeep AI · All fitment answers
Will 37-inch tires fit a Cherokee XJ with a 4.5-inch lift?
Fitment answer · Updated October 27, 2026
Short answer
Not without big changes. A 4.5-inch XJ is too short for 37s; owners who run them add heavy fender cutting or flat fenders, a long-arm setup and a stronger axle, and many go to 6.5 inches or more.
Shop the gear for this build ↓ Tires, deflators and a compressor picked for this setup.
What you usually need
- Heavy trimming or flat fenders and a regear.
- Long-arm suspension and low-backspacing wheels.
- A stronger front axle; the stock Dana 30 is weak for 37s.
Regearing
37s on an XJ need 5.13 or deeper 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.
Amazon Associates disclosure: As an Amazon Associate, TekJeep AI earns from qualifying purchases. These links include our affiliate tag tekjeep-20.
FAQ
Do 37s fit a 4.5-inch XJ?
Not without big changes.
What else do I need?
Heavy trimming or flat fenders and a regear.
Do I need to regear?
37s on an XJ need 5.13 or deeper 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 Cherokee XJ · 35s on a Cherokee XJ · 31s on a stock Cherokee XJ · 33s on a 3" XJ · 35s on a 4.5" XJ · 33s on a 2" XJ · 37s on a Cherokee XJ · 35s on a 3" XJ
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