Description: Premium cast iron vented rotor design reduces brake fade and extends service life, These 11-1/4" rotors feature dual wheel bolt patterns to fit 5 on 4-1/2" and 5 on 4-3/4" axles, These are compatible with axle flange diameters of 6-1/4" or smaller, Center hole size is 2.78" ID but you can machine it larger to suit your needs, 2.30" backspace works well with several bolt on rear brake brackets Replacement 11-1/4 Inch Rear Brake Rotor Sku # 91031039 Mfr. Part # 91031039 Condition New Brand Speedway Motors Sold Each Details Info These 11-1/4" one-piece, vented iron disc brake rotors are for rear disc brake applications. Features dual bolt patterns for 5 x 4.5" (Ford/Mopar) and 5 x 4.75" (Chevy/GM) wheels. Center Hole: 2.78"Backspace: 2.30"Maximum Axle Flange Diameter: 6-1/4"Thickness: 1"Thickness @ Center of Rotor: 0.236" Installation Tips Installation note: The inside diameter of this rotor will accept an axle flange that has a diameter of 6-1/4" or smaller. If your axle flange exceeds 6-1/4" in diameter, you will need machine your axle flange to decrease your axle flange diameter to fit this rotor as necessary. When utilizing an aftermarket axle with disc brake conversion kits, it may be necessary to reduce the diameter of the axle flange to a diameter necessary to adequately fit inside the required Clearance I.D. that the brake hat/brake rotor will require. (see above diagram for illustration) This rotor has been designed for use with axles that have a 2.790" pilot. Aftermarket axles such as Currie have a 2.795" pilot and require the center hole of this rotor to be machined larger in order to fit. If you are using aftermarket axles with a 2.795" pilot, we offer Part # with a 2.80" Center Hole Diameter that is better suited to these applications. Specs Sold in Quantity Each Rotor Diameter 11.25 Inch Bolt Pattern Dual: 5 on 4.5" | 4.75" Rotor Shape Round Rotor Style Plain Face Rotor Finish Natural Inside Diameter 2.78 Rotor Thickness 1 Position Rear Rotor Type Vented MFG. Part # 91031039 Rotor Material Type Cast Iron Backspace 2.3 Notes Thickness at Center of Rotor: 0.236" Flange Diameter 6.25 Reviews Yes Rated by Bill on November 30, 2021 Summary: Perfect for universal applications Yes, I recommend this product. I would buy this product again and again! Rated by Tomcat on May 03, 2021 Summary: Well manufactured Yes, I recommend this product. Would purchase again. Rated by Art Butler on March 28, 2020 Summary: Used them on a narrowed 9 ford rear end with disk conversion that used 1979-1985 Cadillac rear calipers. Rotor offset, diameter and thickness were perfect fit. However, outside axle hole had to be enlarged a small amount and enlarged wheel stud holes to 39/64 to accept .615 Knurl 1/2x 20 wheel studs. All and all this is Hot Rodding! Pros: Good quality,fair price and fast shipping. Yes, I recommend this product. If needed I would purchase again Rated by Jim on July 29, 2019 Summary: Everything was great. Employees very professional Yes, I recommend this product. Great product and good price! Rated by Eric Gil on April 01, 2019 Summary: I installed these on my ford 9 inch rear end for a g body. Since It had bigger heavier duty axles( 35 spline) I had to get the center hole diameter larger. Other then that its a good product and great pricing. Yes, I recommend this product. Related Items / Suggested Parts GM 10 & 12 Bolt Bolt-On Rear Disc Brake Kit AFCO 6691903 Ultra HTX 600+ Brake Fluid, 16.9 oz. Tech Support We're here to help before and after your purchase. If you have a question or need assistance with one of our products, please contact us through eBay Messaging and a knowledgeable Speedway Motors team member will be happy to help. About Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 72 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
Price: 52.99 USD
Location: Lincoln, Nebraska
End Time: 2024-11-23T13:14:43.000Z
Shipping Cost: 15.99 USD
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Item Specifics
Return shipping will be paid by: Seller
Returns Accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money Back
Return policy details:
Brand: Speedway Motors
Placement on Vehicle: Rear
Rotor Style: Solid
Type: Brake Rotors
Manufacturer Part Number: 91031039
Item Height: 2.900
Item Length: 11.80
Universal Fitment: Yes
California Prop 65 Warning: True