Part # 91031908

Disc Brakes

Brake Rotors

Speedway Disc Brake Rotors

Part # 91031908

Pro-Lite Vented Brake Rotor, 12.19 x .81 Inch

Part # 91031908

Pro-Lite Vented Brake Rotor, 12.19 x .81 Inch

Name: Pro-Lite Vented Brake Rotor, 12.19 x .81 Inch
Brand: Speedway Motors
SKU: 91031908
Price: 28.99 USD
Availability: InStock
Rating: 4.8 (5 reviews)

Speedway Motors

5 Reviews

2 Questions

32 vane casting provides superior heat management and long service life
Rotor Hat Bolt Pattern: 8 x 7.00"
Thru thread

$28.99

each

In Stock

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Product Summary

Rear Position, Round Rotor Shape, Vented Rotor Type

32 vane casting provides superior heat management and long service life
Rotor Hat Bolt Pattern: 8 x 7.00"
Thru thread
Cast from premium grade, long grain carbon iron
Rotor Thickness: 0.82"

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Key Specs

Position	Rear
Rotor Shape	Round
Rotor Diameter	12.19 Inch
Rotor Type	Vented
Rotor Style	Plain Face

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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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Details

Every brake 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 disc brake rotor on left or right hand mounting locations.

Thickness: .81"
Outside Diameter: 12.19"
# Holes: 8
Bolt Circle: 7"
Thread: Thru
Weight: 8.70 lbs

IMCA Approved.

Charts

Pro-Lite Rotor Application Chart (GIF)

Guides & Documents

Brake Rotors Guide/Document (91031908)

CA Prop 65

Specifications

KEY SPECS
MFG. Part #	91031908
Brand	Speedway Motors
Position	Rear
Rotor Shape	Round
Rotor Diameter	12.19 Inch
Rotor Type	Vented
Rotor Style	Plain Face
Rotor Material Type	Cast Iron

GENERAL
Rotor Finish	Natural
Rotor Thickness	0.82"
Rotor Hat Bolt Pattern	8 x 7.00"
Weight	8.7 lbs.
Sold in Quantity	Each