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America's Oldest Speed Shop ®
Speedway Motors Bill Smith

1969-1972 GM Midsize 11 Inch Brake Rotor, 5 on 4 3/4 Inch

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Specs
Material Type:
Cast Iron
Sold in Quantity:
Each
Finish:
Natural
Bolt Pattern:
5 on 4.75"
Stud Length:
.80
Stud Diameter:
.44
Thread Pitch:
7/16"-20
Flange Diameter:
6.46
Rotor Diameter:
11.00
Rotor Thickness:
1.05
Rotor Construction:
Vented
Garage Sale:
No
Rotor Location:
Front
Rotor Shape:
Round
Drilled:
No
Slotted:
No

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Watch the video below to learn how to correctly measure your wheel bolt pattern.

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What's in the Box

We stock those hard-to-find replacement brake rotors for your 1969-1972 GM midsize car. These rotors are specifically designed for the rigors of dirt track racing.  Drilled with a 5-on-4.75" bolt circle. Includes 7/16" fine quick-start wheel studs (installed).

  • 1969-1972 GM Midsize
  • 11 Inch Brake Rotor
  • 5 on 4-3/4 Inch
  • 7/16" fine studs installed
  • 11" diameter x 1"
  • IMCA Approved

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

 

 

Application

This rotor is original equipment on:

  • 1969-1972 Chevelle, Monte Carlo
  • 1969-1974 Nova
  • 1970-1972 Cutlass, 442
  • 1969-1972 GTO, LeMans, Grand Prix
  • 1971-1974 Pontiac Ventura

To use these rotors on any of these cars, you will want to order:

  • Outer bearing cone 912-TLM11949
  • Inner bearing assembly 912-TS6
  • The outer bearing cup in the rotor is the correct one for the application. When it needs to be replaced, use 912-TLM11910
  • You can purchase the correct inner grease seal for these original applications at your local auto parts store

 

Notes

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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