1979-25 Ford Mustang Wheel Offset Guide

Mustang Wheel Offset

Most 1994-2026 Mustangs fit wheels with a 5x114.3mm bolt pattern and an offset between +35mm and +50mm. 1979-1993 Fox Body Mustangs use a 4x108mm bolt pattern and offsets between +15mm and +25mm. Lug studs are 1/2"-20 on 1979-2014 cars and M14x1.5 on 2015 and newer cars.

Getting offset, backspacing and center bore right is the difference between wheels that sit flush and wheels that rub, poke past the fenders or hit suspension parts. LMR has sold Mustang wheels for decades, including our own SVE wheel line, and this chart covers every generation from the Fox Body to the S650.

The offset ranges are typical fitment ranges for the generation, not exact factory numbers. The right offset for your car also depends on wheel width, tire size, brakes and ride height. For reference, Ford's 2015-2023 Mustang GT Performance Pack wheels are 19x9 with a +45mm offset up front and 19x9.5 with a +52.5mm offset in the rear.

What Is Wheel Offset?

Wheel offset is the distance, in millimeters, between the wheel's mounting surface (where it bolts to the hub) and the centerline of the wheel. It controls how far in or out the wheel sits in the fender.

Too much positive offset can make the wheel hit the strut, spring or brake caliper. Too little can push the tire past the fender lip, cause rubbing and add stress to wheel bearings and suspension parts.

Backspacing is the distance, in inches, from the mounting surface to the inner edge of the wheel. It describes the same position as offset, measured from a different reference point, so changing one always changes the other.

How To Measure Backspacing

1. Lay the wheel face down on a flat surface.
2. Lay a straight edge across the back lip of the wheel.
3. Measure straight down from the straight edge to the mounting surface. That measurement is the backspacing.

How To Convert Backspacing and Offset

A wheel's actual width is about 1 inch wider than its listed size, because the listed width is measured between the bead seats.

• Backspacing (in) = (listed width + 1) ÷ 2 + offset (mm) ÷ 25.4
• Offset (mm) = [backspacing (in) − (listed width + 1) ÷ 2] × 25.4

Example: a 19x9.5 wheel with a +52.5mm offset, like the S550 GT Performance Pack rear wheel. Half the actual width is (9.5 + 1) ÷ 2 = 5.25". The offset in inches is 52.5 ÷ 25.4 = 2.07". Backspacing is 5.25 + 2.07 = 7.32", or about 186mm, which matches Ford's published spec.

Mustang Bolt Patterns

Bolt pattern is the number of lug studs and the diameter of the circle they form. Ford has used two patterns on Mustangs since 1979:

• 4x108mm (4x4.25"): 1979-1993 Fox Body Mustangs
• 5x114.3mm (5x4.5"): 1994-2026 Mustangs, and Fox Bodies with a 5-lug conversion

SHOP 5-Lug Conversion Kits

Center Bore and Hub-Centric Rings

The center bore is the hole in the middle of the wheel that centers it on the hub. Mustangs are hub-centric, so the wheel's bore should fit the hub closely. Many aftermarket wheels have a larger bore to fit several cars; a hub-centric ring fills the gap and prevents vibration.

Fox Body hubs measure 63.4mm, so 5-lug converted Fox Bodies running 1994-2004 style wheels may need rings to fill the difference.

SHOP SVE Fox Body Hub-Centric Rings

Lug Studs and Lug Nuts

• 1979-2014 Mustangs: 1/2"-20 studs.
• 2015-2026 Mustangs: M14x1.5 studs. Ford made the switch with the S550, so older lug nuts won't thread onto newer cars.
• Seat type: most aftermarket Mustang wheels use a 60-degree conical seat. Check that your lug nuts match your wheels, because factory lug nuts don't always fit aftermarket wheels.

Always torque lug nuts to spec with a torque wrench, and re-check after the first 50-100 miles. See our Mustang Wheel Torque Specs guide for the numbers for your year.

Before You Buy: Mustang Wheel Fitment Checklist

1. Confirm your bolt pattern and lug stud thread.
2. Match the offset to your generation and the wheel width you want.
3. Check brake clearance, especially on Performance Pack, GT500 and big brake kit cars.
4. Plan for hub-centric rings if the wheel's bore is larger than your hub.
5. Pick a tire size that keeps the overall diameter close to stock for accurate speedometer and traction control.
6. On 2007 and newer cars with TPMS, budget for sensors.
7. Check your generation's fitment guide for sizes we've tested.

For tested sizes and offsets for your car, see LMR's Fox Body, SN95/New Edge, S197, S550 and S650 wheel and tire fitment guides.

Mustang wheel offset FAQ

What is the offset on Mustang wheels?

Most 1994-2026 Mustangs fit wheels with a +35mm to +50mm offset. 1979-1993 Fox Body Mustangs fit +15mm to +25mm.

What is the Mustang bolt pattern?

1979-1993 Fox Body Mustangs use 4x108mm. 1994 and newer Mustangs use 5x114.3mm (5x4.5").

What size are stock Mustang wheels?

Factory sizes range from 14-17 inches on Fox Body Mustangs, 15-17 inches on 1994-2004 cars, 16-19 inches on 2005-2014 cars and 17-20 inches on 2015-2026 cars, depending on trim.

What is the center bore on a Mustang?

Fox Body Mustangs have a 63.4mm center bore. 1994 and newer Mustangs measure about 70.6mm.

Do 2014 Mustang wheels fit a 2015 Mustang?

The bolt pattern is the same, but the lug studs changed from 1/2"-20 to M14x1.5 in 2015, so you need lug nuts for your car. Check offset and brake clearance as well, especially on Performance Pack cars.

What is the best size wheel for a Mustang?

As a rule, stay with the factory diameter or go 1-2 inches larger. The right size depends on your generation, brakes and suspension, so check your fitment guide or contact LMR's tech team before ordering.

Get The Right Fit The First Time

The correct offset, backspacing and center bore keep your Mustang looking right and driving right. When you buy wheels from LMR, every listing is matched to your Mustang's bolt pattern and fitment. Questions about your exact car? Contact LMR's tech team before you order.