What tire size fits a Wrangler without trimming?

It depends on generation, trim, wheel offset, and lift height. Send those four and we will tell you what clears and what rubs.

Do I need to re-gear for 37s?

Often, and it depends on your axle ratio and how you drive. We will tell you if yours wants one.

Does a lift need an alignment?

Yes. Any meaningful suspension change gets an alignment or an alignment check, and suspension work gets a re-torque at 500 miles.

Jeep Wrangler built at Ernie's Custom Shop in Vernon Hills, IL

Wrangler TJ, JK, and JL

Jeep Wrangler Lifts, Wheels, and Armor

The Wrangler is the vehicle we build most, and the one where tire size decides everything else. Lift height, wheel offset, gearing, and the spare carrier all follow from the tire you pick. We start there and work outward.

Covers TJ, JK, and JL, including Rubicon and 392.

Call 1-224-292-9007 Text the Shop

Setups people go with

Setups we build on this platform. Tell us which one you are after and we will price it with the labor.

Leveling or 2in lift on 33s: The mildest useful change on a JL. Keeps the factory spare carrier and usually keeps the factory gearing.
2.5in lift on 35s: The most common Wrangler setup we quote. Needs a look at brake lines, bump stops, and the spare.
3.5in long arm on 37s: What the bronze 392 in our gallery runs. Long arm geometry, adjustable track bar, extended brake lines, and a taller bump stop.

What affects fitment

Year, make, and model on their own do not settle whether a part fits. These are the things that change the answer.

Generation and bolt pattern. TJ is 5x4.5in; JK and JL are 5x5in.
Trim. A Rubicon leaves the factory on 33s with different gearing than a Sport.
Wheel offset and backspacing, which decide whether a 35 rubs at full lock.
Axle gearing. Tall tires change your effective ratio and how the Jeep drives.
The factory spare carrier, which does not take every tire size.
Brake line length, bump stop height, and track bar geometry after a lift.
TPMS sensors and any steering or ADAS calibration the vehicle expects.

A manufacturer's fitment list gets us close. We check it against your actual vehicle, including the trim and anything already changed on it.

What goes with it

Specified alongside the main parts rather than discovered afterward.

Extended brake lines once the lift passes the factory line length
A bump stop kit, so a 35 or 37 does not find the fender at full compression
An adjustable track bar to recenter the axle after a taller lift
A re-gear when tire size has pulled the effective ratio too tall
A spare tire carrier or relocation bracket for larger spares

What we install on a Jeep Wrangler

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Suspension

Leveling kits, spacer lifts, and full suspension kits
Fox shocks and performance shock packages
Adjustable control arms, track bars, and steering stabilizers
Extended brake lines and bump stop kits

Wheels and tires

Axe, Fuel, Method, and Fittipaldi wheels, including beadlocks
BFGoodrich, Nitto, Falken, and Toyo all-terrains and mud-terrains
Mounting, balancing, TPMS, and lug torque with a re-torque at 50 miles

Lighting

Baja Designs, Rigid, KC HiLites, and XKGlow packages
Light bars, ditch lights, fog lights, and rock lights on fused circuits
Switch panels and protected wiring routes

Armor and exterior

Front and rear bumpers, including rear bumpers with a tire carrier
Rock sliders, rock rails, skid plates, and diff guards
Fender armor, flares, and custom fabrication when nothing off the shelf fits

How each of these is specified and priced:

Lifts & Suspension Wheels & Tires Custom Builds & Accessories Lighting & Electronics

6 Jeep Wrangler builds from our shop

What went on each one, not a stock photo.

See the gallery →

2023 Jeep Wrangler 392

392 HEMI Powerhouse

Suspension & Lift

3.5" Long Arm Suspension Lift
Adjustable Track Bar
Extended Brake Lines
Bump Stop Kit

Wheels & Tires

37" Off-Road Tires
Custom Bronze Finish Wheels
TPMS Sensors

Exterior

Custom Bronze Accents
LED Light Bar
Rock Rails

Jeep Wrangler Rubicon

Show-Ready Trail Build

Wheels & Tires

Fittipaldi Beadlock Wheels
Green Beadlock Rings
Mud-Terrain Tires

Lighting

Baja Designs LED Package
Amber Fog + Ditch Lights

Exterior

Custom Front Bumper
Green Accent Package
Fender Armor

Jeep Wrangler

SEMA 2025 Show Build

Suspension & Lift

Off-Road Suspension Package
Steering Stabilizer

Wheels & Tires

Beadlock Wheels
Mud-Terrain Tires

Armor & Protection

Rock Sliders
Skid Plates
Diff Guards

Jeep Wrangler

SEMA 2025 Show Build

Suspension & Lift

Lift Kit
Control Arms
Track Bar

Exterior

Custom Paint Job
LED Lighting Package
Custom Fender Flares
Aftermarket Grille

Wheels & Tires

Custom Wheels
Off-Road Tires

Jeep Wrangler

SEMA 2025 Show Build

Exterior

Custom Vehicle Wrap
Aftermarket Bumpers
Fender Flares

Performance

Performance Exhaust
Cold Air Intake
ECU Tune

2001 Jeep TJ

Custom Show Build

Suspension & Lift

2.5" Lift Kit
Extended Brake Lines
Bump Stop Kit

Wheels & Tires

Fittipaldi Off-Road Wheels
All-Terrain Tires

Exterior

Lavender Lust Custom Paint
XKGlow Underglow Lighting
XKGlow Rock Lights
Custom Fabrication Work

Jeep Wrangler questions we get

What tire size fits a Wrangler without trimming?: It depends on generation, trim, wheel offset, and lift height. Send those four and we will tell you what clears and what rubs.
Do I need to re-gear for 37s?: Often, and it depends on your axle ratio and how you drive. We will tell you if yours wants one.
Does a lift need an alignment?: Yes. Any meaningful suspension change gets an alignment or an alignment check, and suspension work gets a re-torque at 500 miles.

Plan a Jeep Wrangler build

Tell us the year, the trim, and the tire size you are after. We check fitment against your vehicle and quote the parts and the labor together.

Call 1-224-292-9007 Text the Shop Hours & Directions