Product Summary

Universal Fit, Rear Position, Solid Rotor Type

  • Replacement vented cast iron rotor for Speedways 9 Inch Ford truck rear end disc brake kit 916-64084
  • 11.5" rotor drilled out with a 5 on 5.5" bolt pattern for use with 1/2" wheel studs
  • Center hole of this rotor measures 4.180" inside diameter
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Key Specs

MFG. Part #91664085
BrandSpeedway Motors
Rotor StylePlain Face
Bolt Pattern5 on 5.5"
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Need To Know

Quick and Easy Returns

Return Policy

Speedway Motors 91664085 Details

Replacement rotors for 91664084

  • Drilled 5x5.5" for 1/2" Studs
  • Sold individually

Speedway Motors 91664085 Specifications

KEY SPECS
MFG. Part #91664085
BrandSpeedway Motors
Rotor StylePlain Face
Bolt Pattern5 on 5.5"
GENERAL
PositionRear
Rotor TypeSolid
Sold in QuantityEach

Ratings & Reviews

5

3 Reviews

Overall Assessment

Customers mainly appreciate the quality and cost-effectiveness of this Ford 9 rotor. They found it practical for custom rear disk conversion, and paired it successfully with both GM metric and Chevy truck calipers. This rotor improved the performance of vehicles such as the Jeep and Dana 44, without overpowering the front axle. Highly recommended.

5

3 reviews

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Great product! Def buy again

5.0

6 months ago

J

Arkansas

Verified

I needed a replacement rotor for a disk brake setup in my 68 f100. Great quality and price.

Would Recommend

It's a rare 5 on 5.5 Ford 9 rotor

5.0

2 years ago

Dan B.

Omaha,NE

Verified

I used this instead of a dodge ram rotor Chevy truck caliper in the back. It was over powering front of jeep with hpdana30 axle. I run a ford9 with these rotors and Chevy metric car calipers

Would Recommend

Yes

5.0

6 years ago

John

Pottstown pa.

Verified

Made my own rear disk conversion on a Dana 44 Jeep rear with these rotors and some gm metric calipers. Spent just a little over $200 compared to $600.

Would Recommend

Showing 3 of 3 reviews

Questions & Answers

3 Questions • 3 Answers

What is the inside diameter? Will it fit over my axle flange which is about 6.38 diameter. Do you sell a register adapter because the register diameter of my axle flange is 3.06.

by John

• 5 years ago

1 answer

What is the center bore of the rotor And it's it a drum in hat rotor or for parking brake it looks like it just want to confirm. I know you can't guarantee that it will work but basically what I'm trying to do is find A rotor That will work with a 97 Ford explored disk brake hardware on f150 8.8 that has a larger Hub flange And this May be a perfect match Explore rotor spec 11.220 Brake Rotor Thickness, Discard (IN) 0.433 Brake Rotor Thickness, Nominal (IN) 0.475 Brake Rotor Type Drum-in-Hat Center Hole Diameter, Maximum (IN) 2.803 Center Hole Diameter, Minimum (IN) 2.800 Performance Level Standard Performance Surface Finish Plain Wheel Bolt Circle Diameter (IN) 4.500 Wheel Bolt Hole Diameter, Maximum (IN) 0.588 Wheel Bolt Hole Diameter, Minimum (IN) 0.578 Wheel Bolt Holes, Primary 5

by Maxwell

• 7 years ago

1 answer

What is the rotor thickness and hat height?

by Andy

• 7 years ago

1 answer

3 of 3 questions shown

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