1979-Up GM Metric Stock Car Disc Brake Rotor, 5 on 5 Inch

#91031061

1979-Up GM Metric Stock Car Disc Brake Rotor, 5 on 5 Inch

Name: 1979-Up GM Metric Stock Car Disc Brake Rotor, 5 on 5 Inch
Brand: Speedway Motors
SKU: 91031061
Price: 89.99 USD
Availability: InStock
Rating: 5 (14 reviews)

14 Reviews

13 Questions

5 on 5" bolt circle
10.5" diameter x 1" thick durable rotors
82-'87 spindle applications, and must use 912-TS3 outer bearings

Bolt Circle Pattern:

5 x 5"

5 x 4-3/4"

$89.99

/each

In Stock

Quantity

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Product Summary

Front Position, Round Rotor Shape, Vented Rotor Type

5 on 5" bolt circle
10.5" diameter x 1" thick durable rotors
82-'87 spindle applications, and must use 912-TS3 outer bearings
Large bearing fits most metric spindles
*Not Designed for asphalt racing

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Key Specs

Rotor Diameter	10.50 Inch
Rotor Style	Plain Face
Rotor Material Type	Cast Iron
Rotor Thickness	1"
Bolt Pattern	5 on 5"

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Installation Details

Installation Tips

Proper Break-In Procedure for Steel or Cast Iron Rotors

New steel/iron rotors should be bedded in before being used in racing conditions. Proper bedding will prepare the rotor surface, prolong the rotor's life, and make it more resistant to thermal checking or cracking under severe braking conditions. The following procedures should be performed when bedding in both steel and cast iron rotors. It is best to bed in a new rotor using a used set of pads, preferably ones which will not create heat rapidly. Generating heat too rapidly will thermal shock the rotors. Likewise, when bedding in a new set of brake pads it is best to perform the process on a used rotor. This new/used bedding process permits controlled bedding of each individual component.

Make sure rotor surfaces are free from oils, grease, and brake fluid. Run vehicle up to a moderate speed and make several medium deceleration stops to heat up the rotor slowly. This will help reduce the chance of thermal shock caused by uneven heating of the rotor. Pull into the pits and allow the rotor to cool to ambient air temperature. Care should be taken not to ride the brakes into the pits as this may hot spot the rotor causing premature wear to the surface or structural damage.

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Speedway Motors 91031061 Details

This 1979-up GM Metric front disc brake rotor will work with a Set # 6 inner bearing/race which fits most spindles. 5 on 5" with 5/8" coarse studs installed. 10.5" diameter x 1". Must be used with 912-TS3 outer bearings for 1982-1987 spindle applications. IMCA Approved.

This is a 1979-1981 Metric GM rotor with the bolt pattern changed to 5 on 5". It can be used on 1982-1987 GM metric spindles if the you use our bearing/seal kit 91031048, or use at least the 1979-1981 style outer bearing 912TS3.

This rotor is designed for dirt track applications and should NOT be used for asphalt racing.

Item Details

5 on 5"

CA Prop 65

Speedway Motors 91031061 Specifications

KEY SPECS
MFG. Part #	91031061
Brand	Speedway Motors
Rotor Diameter	10.50 Inch
Rotor Style	Plain Face
Rotor Material Type	Cast Iron
Rotor Thickness	1"
Bolt Pattern	5 on 5"

GENERAL
Position	Front
Rotor Shape	Round
Rotor Type	Vented
Rotor Finish	Plain
Stud Length	2.32"
Stud Diameter	0.63"
Thread Pitch	5/8"-11
Weight	18.15 lbs.
Sold in Quantity	Each
Notes	Designed for dirt track applications.

Ratings & Reviews

14 Reviews

Overall Assessment

Customers highly recommend our brake rotor not only for its affordability but also for its top quality. It fits perfectly on different vehicle models including dirt race cars and an '86 olds hobby stock. The product features outstanding advantages like easy conversion to a 5x5 bolt pattern and seamless installation. Besides being good value for money, our rotors exceed expectations with their solid build, quality studs and well-executed drilling. They are favorable compared to costlier options from other parts stores, delivering impeccable performance and easy setup. Users affirm they would definitely repurchase, highlighting our product's superior quality and practicality.

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14 reviews

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Yes

5.0

8 months ago

Rotor

Bullhead city AZ

Verified

Nice fitment

Would Recommend

Good Rotor for the Money

5.0

3 years ago

Shrek

Clayton, IN

Verified

Its a good brake rotor for the money.

Would Recommend

I would buy this again.

5.0

4 years ago

Verified

Dirt race car.

Fit like it should

5.0

6 years ago

Darrell

Junction City Ky

Verified

Bolted them on 86 olds hobby stock

Would Recommend

great price and quality

5.0

6 years ago

Eric

Fairbury illinois

Verified

used on our daughters race car.

Would Recommend

I would purchase this product again.

5.0

6 years ago

Ohio

Verified

An easy conversion to 5x5 bolt pattern for the metric spindle.

Would Recommend

Rotor for 3 piece spindle

5.0

7 years ago

Mod 17y

California

Verified

Product arrived on time, nicely packaged, install was easy.

Would buy this product again.

5.0

7 years ago

Buster

Troy, Missouri

Verified

Went to 5 on 5 on the dirt track car. Purchased bearing set form Speed Motors to go with the new rotors to fo with the 5 on 5 rotors.

Would Recommend

Great product

5.0

9 years ago

Dave Daniels

Dugger, In

Verified

No complaints whatsoever!!

Would Recommend

A+

5.0

9 years ago

Sternhardt

Hazen ND

Verified

A+

Would Recommend

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Questions & Answers

13 Questions • 11 Answers

Sort Questions

Will these fit a pinto spindle?

by Timothy

• 2 years ago

1 answer

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Do these rotors come with the bearing races installed already?

by race fan

• 8 years ago

1 answer

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Hello would you happen to have this same rotor in a 5 on 5.5 ? I need it to fit a 2wd 1994 chevy s10.

by Dale

• 8 years ago

1 answer

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Will these fit a 1998 s10 sonoma spindle?

by Ken

• 8 years ago

1 answer

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Will these fit an 82-93 s10 spindle?

by Doug

• 9 years ago

2 answers

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Will these work on 80 camaro?

by Jeffrey

• 9 years ago

1 answer

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Will these work with 1982 Malibu spindles? I need to go to 5x5 bolt pattern.

by ssaammyy21

• 9 years ago

1 answer

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Will these work on an 84 chevy caprice

by Natty

• 9 years ago

1 answer

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is it possible to get these rotor but with regular size studs?

by Kurt Stone

• 9 years ago

1 answer

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My spindles have casting #s left 459755 and right 459756. Which bearing kit do I need to install these on my Mod.

by racer#39

• 10 years ago

1 answer

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