Pro-Lite Vented Brake Rotor, 11.75 x .81 Inch

#91031906

Pro-Lite Vented Brake Rotor, 11.75 x .81 Inch

Name: Pro-Lite Vented Brake Rotor, 11.75 x .81 Inch
Brand: Speedway Motors
SKU: 91031906
Price: 57.99 USD
Availability: InStock
Rating: 4.7 (25 reviews)

25 Reviews

7 Questions

Cast from premium grade, long grain carbon iron which exhibits long wear, high thermal stability, and excellent resistance to distortion
32 vane design provides superior heat management and long service life
The straight vane design allows the same rotor to be used on both left or right hand sides

Outside Diameter / Thickness:

11.75" x 0.810"

12.19" x 0.810"11.75" x 1.25"11.75" x 0.810" (Pair)

$57.99

/each

In Stock

Quantity

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Product Summary

Universal Fit, Rear Position, Round Rotor Shape, Plain

Cast from premium grade, long grain carbon iron which exhibits long wear, high thermal stability, and excellent resistance to distortion
32 vane design provides superior heat management and long service life
The straight vane design allows the same rotor to be used on both left or right hand sides
8 on 7" mounting bolt circle is commonly used on brake hats and Grand National hubs
Cost effective alternative to the big name brake companies' rotors

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Key Specs

Rotor Diameter	11.75 Inch
Rotor Style	Plain Face
Rotor Material Type	Cast Iron
Rotor Thickness	0.81"
Rotor Hat Bolt Pattern	8 x 7.00"

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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 91031906 Details

Every rotor is cast from premium grade, long grain carbon iron which exhibits long wear, high thermal stability, and excellent resistance to distortion in high heat. Modern foundry and machining techniques hold close tolerances on face and vane thickness. Combining the correct face thickness with a 32 vane casting provides superior heat management and long service life with low rotating and unsprung weight. The straight vane design also makes it possible to use the same rotor on left or right hand mounting locations.

Thickness: GM .810"
Outside Diameter: 11.75"
# Holes: 8
Bolt Circle: 7"
Thread: Thru
Weight: 8.00 lbs

IMCA Approved.

Charts

Pro-Lite Rotor Application Chart (GIF)

Guides & Documents

Brake Rotors Technical Information (91031906)

CA Prop 65

Speedway Motors 91031906 Specifications

KEY SPECS
MFG. Part #	91031906
Brand	Speedway Motors
Rotor Diameter	11.75 Inch
Rotor Style	Plain Face
Rotor Material Type	Cast Iron
Rotor Thickness	0.81"
Rotor Hat Bolt Pattern	8 x 7.00"

GENERAL
Position	Rear
Rotor Shape	Round
Rotor Type	Vented
Rotor Finish	Plain
Vane Count	32 Straight Vane
Weight	8 lbs.
Sold in Quantity	Each
Notes	IMCA approved.

Ratings & Reviews

4.7

25 Reviews

Overall Assessment

Customers highly recommend the product for its exceptional quality and affordability. They find it particularly advantageous for racing applications, confirming its excellent fitness and durability. Users emphasize product's efficient braking surface and ease of installation, even with various modifications. The product is repeatedly purchased due to its consistent good performance and suitability for different races. It stands out for being a good value rotor with straightforward usage, even under demanding conditions like racing and harsh climates, exceeding expectations at a fair price.

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4.7

25 reviews

Most Liked Positive Review

5.0

Value brake rotor

Used these brake rotor in a pro truck race vehicle (Short track racing). You can definitely spend more on rotors but our application doesn't warrant the extra expense (we don't get the rotors that hot). These rotors fit well and had a good braking surface. I would use them again.

Most Liked Negative Review

3.0

Yes i would buy again

Late Model 1/4 asphalt track

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I would buy it again

5.0

2 years ago

Old man

Lindon co

Verified

Nine in Ford rear end under my 34 Plymouth

Would Recommend

Will buy again

5.0

3 years ago

Danny

Troy, Ohio

Verified

Used on my modified fits well

Would Recommend

have bought 2

5.0

4 years ago

Steve

knoxville tn

Verified

great produck

Would Recommend

I would buy the product again

5.0

4 years ago

Racingtoad13

Tampa florida

Verified

Rear rotor for a dirt car.

Would Recommend

Value brake rotor

5.0

4 years ago

Clermont, FL

Verified

Would Recommend

I would buy this product again. Great value for the price.

5.0

5 years ago

Buster

Troy, Mo.

Verified

Building new car for the 2021 racing season.

Would Recommend

I will perches this product again

5.0

6 years ago

Larry

Meridian Ca

Verified

Quality product at a low price

Would Recommend

Great rotors at a good price

5.0

6 years ago

Hot rod

Daytona Beach Florida

Verified

Will be drag racing the car need to slow down at the other end please rotors should help

Would Recommend

Oh hell Yes I'd buy these again

5.0

6 years ago

Jay

Exeter, ca

Verified

These rotors are made well and a great price.

I would buy again

5.0

6 years ago

Coop

Wyoming

Verified

Rotors seem to be well built, will see how ware will be.

Would Recommend

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Showing 10 of 25 reviews

Questions & Answers

7 Questions • 8 Answers

Sort Questions

Will these rotors fit a winters grand national hub

by Dirtracer bill

• 8 years ago

1 answer

View Answer

what metric caliper,bolt kit and pads are commonly used with these rotors on the rear of a imca modified with your gn hubs and your clamp on brake caliper mounts. thanks.

by andrew

• 8 years ago

1 answer

View Answer

What is the discard thickness on these rotors? How much thinner can they safely be machined?

by diy

• 9 years ago

1 answer

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Do these come with the bolts?

by Patrick

• 9 years ago

1 answer

View Answer

What non-emergency brake style calipers & brackets are used with these rotors?

by jdtrato

• 13 years ago

2 answers

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What non-emergency brake caliper is used for your 91031906 rotors? Also, will the same rotors work for your drilled or scalloped rotors as well? Please if possible include the year, make, & model of caliper the vehicle is originally used for. Thank you. The application is strictly for the off-road. 5 ton pinion style brakes.

by jdtrato

• 13 years ago

1 answer

View Answer

Why do you offer both the .81 and the 1.25 inch thick rotors? What is the difference besides the thickness. Can I use this rotor with a GM rear 1978 and up metric caliper or is this for another application? Will the thicker heavier rotor offer a longer we

by Frank

• 15 years ago

1 answer

View Answer

7 of 7 questions shown