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11 Inch Mustang II Rotor with GM 4.75 Inch Bolt Circle, Metric Caliper

Specs
Sold in Quantity:
Each
Bolt Pattern:
5 on 4.75"
Finish:
Natural
Rotor Diameter:
11.00
Rotor Construction:
Vented
Material Type:
Cast Iron
Rotor Location:
Front
Rotor Shape:
Round
MFG. Part #:
910-31070
Drilled:
No
Slotted:
No
Stud Length:
0.88
Stud Diameter:
0.43
Rotor Thickness:
0.88
Weight:
20.65
11 Inch Mustang II Rotor with GM 4.75 Inch Bolt Circle, Metric Caliper
11 Inch Mustang II Rotor with GM 4.75 Inch Bolt Circle, Metric Caliper
11 Inch Mustang II Rotor with GM 4.75 Inch Bolt Circle, Metric Caliper
VIDEO
11 Inch Mustang II Rotor with GM 4.75 Inch Bolt Circle, Metric Caliper

Click image to enlarge

Details

Reviews (4)

Q & A (5)

What's in the Box

Info

This rotor allows the use of GM Metric calipers along with a GM car bolt pattern. Vented stock 11" diameter brake rotors for 1974-1980 Mustang II, Pinto, or Bobcat spindles (or popular GM Metric calipers and brackets). Brake rotors are new, not plugged or re-drilled. Has a 5 on 4-3/4" bolt pattern with corresponding 7/16" diameter fine thread wheel studs.
  • 5 on 4.75" Bolt circle
  • Granada type rotor
  • For use with popular GM Metric calipers and brackets
  • Bearing and seal kit sold separately (910-31052)

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.

Customer Reviews

Rated 4.5 out of 5 by 4 reviewers.
RATING BREAKDOWN
4 reviews
5 Stars
3
4 Stars
0
3 Stars
1
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

big bear
Verified Purchaser
winston salem n/c

11 inch rotors

October 23, 2016
very good service
Pros:
  • Great Rotors
Cons:
  • None
Yes, I recommend this product.
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Was this review helpful? 0 0

Mopar Stroker
Verified Purchaser
Verified Reviewer
Arizona

Perfect fit on Mustang II front end with Gm metric brakes

June 16, 2015
I hope Speedway never discontinues this hybrid rotor type. They are perfect for Mustang II front ends. My old drilled / slotted 11 "rotors were warped, and I had brake judder from a high speed stop in my '41 Plymouth hot rod. I bought the new bearing, and seal kit to go along with the rotors. They are smooth, and strong with no shaking at all. I use high quality semi-metallic pads that leave very little dust. And, they work well with GM metric calipers. My 2900 lb. Mopar stops quick now. Thanks Speedway...Keep these in your catalog..
Pros:
  • simple bolt on
Yes, I recommend this product.
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Was this review helpful? 0 0

Gas pump guy
Verified Purchaser
Verified Reviewer
Cornville AZ

whooooh

June 07, 2015
Made stopping much easer for a old guy
Pros:
  • they fit
Cons:
  • None
Yes, I recommend this product.
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Was this review helpful? 0 0

bigmellake
Magna, UT, USA

ok This product has great features

October 09, 2014
have ordered many parts, always fits perfect. Speedway is to work with. if your not happy they care!!
Pros:
  • Good Fit
Yes, I recommend this product.
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Page 1 of 1

Product Q&A

5 questions : 5 answers

1 answers

Hub/center bore diameter? I would like to use with wheels from 2010 camero that I would like to use on my build They have 5 x 4 3/4 hole pattern and 66.6 mm hub/center bore

BillJr
Palo Alto, CA, USA
January 15, 2015

Hub/center bore diameter? I would like to use with wheels from 2010 camero that I would like to use on my build They have 5 x 4 3/4 hole pattern and 66.6 mm hub/center bore

Answers

January 16, 2015
EricM
The center snout of this rotor is 2.776" OD. Your 66.6 mm (2.622") center bore in the wheel would have to be machined larger to fit over this rotor, or you could have the rotor machined down smaller.
1 answers

What studs are available for use with this rotor? I will be needing to install longer wheel studs. What are the knurl diameter and length on the supplied studs? Thanks

DonP
February 05, 2014

What studs are available for use with this rotor? I will be needing to install longer wheel studs. What are the knurl diameter and length on the supplied studs? Thanks

Answers

February 06, 2014
EricM
These rotors use a stud with .554" knurl diameter and .340" knurl length. Sorry I do not have longer studs available in this configuration.
1 answers

I am looking for a Granada rotor with 4 3/4 Chevy bolt pattern that uses #3 &#6 bearings Help

Gary
Sergeant Bluff
August 31, 2015

I am looking for a Granada rotor with 4 3/4 Chevy bolt pattern that uses #3 &#6 bearings Help

Answers

September 01, 2015
Eric
Expert
Sorry we do not offer a Granada rotor with 4 3/4" bolt pattern that uses set #3 outer bearing. This rotor uses set #12 outer bearing which has a .860" ID and 1.780" OD.
1 answers

Hi, do I need to get bigger brake caliper brackets for my calipers for these, at present just using the stock 9 1/4 " rotors with corresponding calipers?

Dave
Benniworth UK
September 17, 2015

Hi, do I need to get bigger brake caliper brackets for my calipers for these, at present just using the stock 9 1/4 " rotors with corresponding calipers?

Answers

September 17, 2015
Eric
Expert
Yes you will need all new brake components as well as bearings and seals for this rotor. You would be best off with kit part number 91031950 if you want to upgrade your Mustang II with 11" rotors.
1 answers

Hello, Assuming this doesnt come with bearings installed. Please let me know what bearing and seal is needed. Thank you Matt

matt
new jersey armpit
May 06, 2016

Hello, Assuming this doesnt come with bearings installed. Please let me know what bearing and seal is needed. Thank you Matt

Answers

May 06, 2016
Eric
Expert
Bearing and seal kit 91031052 is commonly used with this brake rotor when installing it onto Mustang II spindles.
Page 1 of 1

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