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Speedway Rear Disc Brake Kit with Emergency Brake, 3 Inch Backspace

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Specs
Sold in Quantity:
Kit
Finish:
Natural
Caliper Finish:
Natural
Rotor Construction:
Vented
Rotor Diameter:
11.75
Rotor Hat Bolt Pattern:
8 x 7.00"
Material Type:
Cast Iron
Bolt Pattern:
Multi: 5 on 5"/4.75"/4.50"
Caliper Pistons:
Single
Rotor Location:
Rear
Rotor Shape:
Round
Thread Pitch:
7/16"-20
Hardware Included:
Yes
Parking Brake Provision:
Yes
Garage Sale:
No
Drilled:
No
Slotted:
No
Centerline of Holes:
5.50
Rotor Thickness:
.81
Notes
Includes rotors, rotor hats, caliper brackets, calipers, pads, and hardware.
Speedway Rear Disc Brake Kit with Emergency Brake, 3 Inch Backspace

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Details

Reviews

Q & A

What's in the Box

Replace those old drum brakes with modern rear disc brakes. This affordable rear disc brake kit conversion gives you an emergency brake just like your family car has. The steel caliper bracket welds to your 3" axle tube, so it will fit virtually any application. The calipers accept either GM or Lokar type E-brake cables and are tapped to accept the common 7/16"- 20 banjo fittings. The 11-3/4" x .81" vented iron rotors will give you plenty of stopping power.

Steel rotor hat fits 5 on 4-1/2", 5 on 4-3/4", and 5 on 5" bolt patterns and has a 3" backspace.

NSRA Legal

910-31933 Instructions (PDF)

Customer Reviews

This product has no reviews.

Product Q&A

9 questions : 9 answers

1 answers

Will this work on a 12-bolt Truck rear? I have a 66 C10 SWB, currently 6lug drum. Plan to have axles re-drilled.

jeromio1
Durham, NC
November 13, 2014

Will this work on a 12-bolt Truck rear? I have a 66 C10 SWB, currently 6lug drum. Plan to have axles re-drilled.

Answers

November 13, 2014
EricM
If you redrill your axles to a 5 lug configuration then this may work for you. You will need to check the axle flange OD and the register OD that the original brake drum centered on. The hat used in this kit requires an axle flange of 5.83" OD or smaller. Also the axle flange register must be 3.05" OD or smaller.
1 answers

I understand the term backspace on wheels, but what is meant by " 3 inch backspace" on these brake conversion kits ?

Cosmo73
Frederick, MD, USA
October 01, 2014

I understand the term backspace on wheels, but what is meant by " 3 inch backspace" on these brake conversion kits ?

Answers

October 02, 2014
EricM
The backspace that it refers to is the brake hat. The hat measures 3" from the axle flange surface to the rotor mount surface.
1 answers

will this kit fit a 1986 mustang with 14in wheels

ponysue
steamboat springs,co
October 26, 2011

will this kit fit a 1986 mustang with 14in wheels

Answers

October 27, 2011
John
Part number 91031933 This kit uses an 11 ¾” rotor and adding 1” for caliper all the way around nets the need of a wheel with minimum of 14” I.D. in the area of the caliper. Unless you have a wheel with enough offset for clearance you will need a minimum of a 15” wheel
1 answers

can this product fit on a 1992 camaro? the 92 camaro has front disk brake and a drum in the back. i want to convert the drum to disk.

I Love Camaro's
Los Angeles, CA
September 24, 2011

can this product fit on a 1992 camaro? the 92 camaro has front disk brake and a drum in the back. i want to convert the drum to disk.

Answers

September 27, 2011
Zach
Speedway part number 91031933 and 91031934. These weld on rear disc brake kits are universal, and can be installed on a variety of rear axles with 5 on 4 1/2", 5 on 4 3/4" or 5 on 5" bolt patterns. There are 2 different kits, one features a brake hat with 3" of offset and the other hat has 1.94" of offset. Measure your axle flange housing flange and determine which one would work best for you. We also offer a bolt on rear disc brake kit that should fit that 7.5" Camaro axle, it is part number 91031928, but it does require that you use 16" or larger wheels.
1 answers

Will this product fit a 2wd 1992 Toyota pickup?

November 15, 2011

Will this product fit a 2wd 1992 Toyota pickup?

Answers

November 17, 2011
John
There were some years of Toyotas that would cross with domestic bolt patterns. The three patterns on these brake rotor hats are 5 on 4 ½, 4 ¾, and 5 on 5. This is measured from the outside of one stud, skip one stud, and to the center of the next stud. This is a 5 lug pattern only and not applicable to any 6 lug hubs.
1 answers

I would like to use this brake system with a 15x10 wheel with a 4.5 back space. what is the total height of the brake system with calipers? would it clear the inside of my rims?

Dayton, Ohio
September 26, 2011

I would like to use this brake system with a 15x10 wheel with a 4.5 back space. what is the total height of the brake system with calipers? would it clear the inside of my rims?

Answers

September 27, 2011
John
This brake kit uses 11.75 rotors and the calipers extend past the rotor approximately 1.375 so with a little clearance you will need a minimum available I.D. of the wheel at the caliper of 14.50”. Some of the caliper casting can be removed to gain some clearance in tight applications. The main issue is the drop in the rim for tire removal in the location of the caliper.
1 answers

Would this kit work with a dana 44 in an 05 jeep wrangler?

bird man
Ipava, il
November 11, 2011

Would this kit work with a dana 44 in an 05 jeep wrangler?

Answers

November 15, 2011
John
These brake kits work with an axle housing tube of 3” O.D. but are commonly modified to meet other dimensions. Proper alignment prior to final welding will yield a quality disc brake set up with the functional emergency brake option. It has the 3 variations of bolt circles for the axle studs and should work fine with your Jeep application. Choose the steel brake hat with 3” of back space or the aluminum with only 1.94” of back space.
1 answers

I would like to use this brake system with a 15x10 wheel with a 4.5 back space. what is the total height of the brake system with calipers? would it clear the inside of my rims?

October 08, 2012

I would like to use this brake system with a 15x10 wheel with a 4.5 back space. what is the total height of the brake system with calipers? would it clear the inside of my rims?

Answers

October 08, 2012
John
This brake kit uses 11.75 rotors and the calipers extend past the rotor approximately 1.375 so with a little clearance you will need a minimum available I.D. of the wheel at the caliper of 14.50". Some of the caliper casting can be removed to gain some clearance in tight applications. The main issue is the drop in the rim for tire removal in the location of the caliper.
1 answers

Will this kit fit a 65 Cadillac Deville? I want to use 15 inch wheels

Nick
Salt lake Utah
June 22, 2015

Will this kit fit a 65 Cadillac Deville? I want to use 15 inch wheels

Answers

June 23, 2015
Eric
Expert
This is a universal kit. Be sure to measure the OD of your axle, the OD of the brake register, as well as the offset of brake hat necessary for your installation. It is certainly possible that this kit would fit your car but I am sorry we have never attempted that installation to know for sure what universal kit would be best suited for you.
Page 1 of 1

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Instructions (PDF)

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                        Replace those old drum brakes with modern rear disc brakes. This affordable rear disc brake kit conversion gives you an emergency brake just like your family car has. The steel caliper bracket welds to your 3" axle tube, so it will fit virtually any application. The calipers accept either GM or Lokar type E-brake cables and are tapped to accept the common 7/16"- 20 banjo fittings. The 11-3/4" x .81" vented iron rotors will give you plenty of stopping power. 

Wilwood aluminum rotor hat fits 5 on 4-1/2", 5 on 4-3/4", and 5 on 5" bolt patterns and has a 1.94" backspace.

NSRA Legal

910-31934 Instructions (PDF)