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NASA Racers! MM will support NASA road racers with $1,000 contingency prizes for the American Iron, American Iron Extreme, and Spec Iron at the 2019 National Champions. You must register to be eligible.

New! Read the article Maximum Motorsports Tames Fox & SN95 Mustang Rear Suspensions on FordMuscle.com.

MRT Exhaust! MM now offers premium MRT cat-back exhaust systems for 1996-2004 Mustangs.

New! for Street & Strip Mustangs! Big-bore rear wheel cylinders for 1979-1993 Mustang with 9" drum brakes. Improves braking when running big rear tires and front skinnies, and/or different OEM front brakes.

New! Swapping a Coyote into a Fox Mustang? MM's Hydroboost Conversion Kits allow easy installation of a 1996-2004 Mustang Hydroboost power brake assist unit into a 1979-1993 Mustang.

New! Swapping an IRS into your Fox Mustang? MM makes it easier with a brake line kit made just for this conversion. Bolts-in, with no cutting or flaring of brake lines. Designed to fit standard IRS brake hoses.

New! MM's billet aluminum Pedal Box Spacer for Fox Mustangs. Replace the breakage-prone OEM plastic spacer when converting to manual brakes or Hydroboost.

Canadians! Please read the latest about ordering from Canada/shipping to Canada.

/DRIVE
We've posted the parts list and link to the video of MM's Mustang in /DRIVE Tuner car Shootout

Bumpsteer Gauge
Actual product may differ from photo.

$139.97

  • Item # MMT-4
  • Manufacturer: Maximum Motorsports
 

 

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New! Not just for Mustangs!

Newly revised Reference Plate fits most 4-lug and 5-lug hubs, allowing use on many non-Ford vehicles.

The MM Bumpsteer Gauge is an essential tool for measuring, adjusting, and correcting bumpsteer.

"Bumpsteer" is when tires steer themselves because the toe setting changes as the suspension moves up and down. Learn more about bumpsteer, from basic to advanced, in our Tech Tip article Facts, Fiction, and the Myth of the Mustang's Bumpsteer Problem.

Of course, this revised version still fits 1979-current Mustangs, including rear of 1999-04 Cobra with IRS.

Fits
  • All 4-lug and 5-lug Mustangs, 1979-current.
  • Rear 1999-04 Cobra IRS
Non-Mustang 4-lug
  • 4-lug hubs with a 4-4.5" bolt circle diameter
  • 4-lug hubs with a 100-120mm bolt circle diameter
  • 4-lug hubs needing a center hole no larger than 2.930" in diameter
  • Wheel studs up to 14mm in diameter
Non-Mustang 5-lug
  • 5-lug hubs with a 4-5" bolt circle diameter
  • 5-lug hubs with a 100-130mm bolt circle diameter
  • 5-lug hubs needing a center hole no larger than 3.00" in diameter
  • Wheel studs up to 14mm in diameter

Note
Assembly required; assembly time is about 15 minutes.

Related products
  • Allows easy bumpsteer measurement.
  • Required when installing a bumpsteer kit to adjust bumpsteer correctly for improved handling.
  • Inexpensive compared to other bumpsteer gauges.
  • Fits most 4-lug and 5-lug wheel hubs.
  • Comes with our copyrighted illustrated instructions showing how to measure and adjust bumpsteer.
  • Precision dial indicator for accurate toe change measurements.
  • Reference Plate fits most 4-lug and 5-lug hubs.
  • Easy to assemble in minutes.
  • Comes with our copyrighted illustrated instructions showing how to measure and adjust bumpsteer.

Fits
Most 4-lug and 5-lug wheel hubs, including 1979 to current Mustangs.

4-lug
  • 4-lug hubs with a 4-4.5" bolt circle diameter
  • 4-lug hubs with a 100-120mm bolt circle diameter
  • 4-lug hubs needing a center hole no larger than 2.930" in diameter
  • Wheel studs up to 14mm in diameter
5-lug
  • 5-lug hubs with a 4-5" bolt circle diameter
  • 5-lug hubs with a 100-130mm bolt circle diameter
  • 5-lug hubs needing a center hole no larger than 3.00" in diameter
  • Wheel studs up to 14mm in diameter

We're working on FAQs for this product. If you have a question, please use our Contact Us page to email your question. We'll answer your question by return email, and also consider it for addition to this FAQ section.

Read our Tech Tip article Facts, Fiction, and the Myth of the Mustang's Bumpsteer Problem. Even though it's about Mustangs, the basic tech info still applies to non-Mustangs.