Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
Speedway Motors Logo
America's Oldest Speed Shop ®

Search

Canadian Leaf

AFCO 9850-6500 GM Metric Style Brake Rotors 1979 and Up, 5 x 5 Inch

SAME DAY SHIPPING! Order within the next 15 minutes and receive same day shipping

Specs
Material Type:
Cast Iron
Sold in Quantity:
Each
Finish:
Natural
Bolt Pattern:
5 on 5"
Stud Length:
2.06
Stud Diameter:
0.63
Thread Pitch:
5/8"-11
Rotor Diameter:
10.50
MFG. Part #:
9850-6500
Rotor Thickness:
1.00
Rotor Construction:
Vented
Garage Sale:
No
Rotor Location:
Front
Rotor Shape:
Round
Drilled:
No
Slotted:
No
Notes
Drilled to fit 5" on 4.75" also.
AFCO 9850-6500 GM Metric Style Brake Rotors 1979 and Up, 5 x 5 Inch
AFCO 9850-6500 GM Metric Style Brake Rotors 1979 and Up, 5 x 5 Inch

Click image to enlarge

Details

Reviews

Q & A

What's in the Box

These AFCO brake rotors are specifically designed for dirt track applications (not for use on asphalt). They meet OEM sanctioning requirements for Modifieds, Street Stocks, and Hobby Stocks.

  • Wheel studs installed
  • Stock-appearing
  • 10.4" diameter x 1" thickness
  • Races installed
  • Pre-drilled with 5 x 5" pattern

Instructions (PDF)

Item Details

5/8" Coarse studs

You may also be interested in:

Speedway 1979-Up GM Metric Brake Rotor
(Part #91031061)
                        

This 1979-up GM Metric front disc brake rotor will work with a Set # 6 inner bearing/race which fits most spindles. 5 on 5" with 5/8" coarse studs installed. 10.5" diameter x 1".  Must be used with 912-TS3 outer bearings for 1982-1987 spindle applications.  IMCA Approved.

This is a 1979-1981 Metric GM rotor with the bolt pattern changed to 5 on 5". It can be used on 1982-1987 GM metric spindles if the you use our bearing/seal kit 91031048, or use at least the 1979-1981 style outer bearing 912TS3.

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




 

AFCO 9851-8550 GM Rotor Master Install Kit
(Part #10698518550)
                        

Get the master install kit or individual accessories!  Master Install Kit Includes:

  • Bearings
  • Seal
  • Washer
  • Nut
  • Pin
  • Dust Cap
Wilwood 160-9239 HP Modified Hub/Rotor, Vented w/Studs, 10.50 Inch
(Part #8351609239)
                        
  • New castings
  • Exact tolerances
  • Come standard with races and 5/8” coarse wheel studs installed
  • 5 on 5” bolt pattern
  • GM Metric rotor is 10.50” diameter by 1.00” thick and fits the 1979 and up GM spindles
1979-Up GM Metric Brake Rotor, 5 on 4-3/4 Inch, 5/8-11 Inch Coarse Studs
(Part #91031091)
                        
This 1979-up GM Metric front disc brake rotor will work with a Set # 6 inner bearing/race which fits most spindles. 5 on 4-3/4" with 5/8"-11 studs installed. 10.5" diameter x 1".  Must be used with 912-TS3 outer bearings for 1982-1987 spindle applications.  IMCA Approved.

This is a 1979-1981 Metric GM rotor with the bolt pattern changed to 5 on 4-3/4". It can be used on 1982-1987 GM metric spindles if you use our bearing/seal kit 91031048, or use at least the 1979-1981 style outer bearing 912TS3.

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

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.
DRP 007 10521S 1979-Up GM Metric Spindle Pre-Load Bearing Spacers
(Part #91031033)
                        
  • Designed to fit '79-up GM Metric spindles
  • Allows your front hubs to be tight with minimal drag and side pre-load
  • Easy adjust threaded sleeve and set screw ensure you'll never worry about an over-tightened front hub again
  • Sold each
Wheel Stud Drill Bit
(Part #91082007)
                        

43/64" wheel stud drill bit with 1/2" shank. Used to drill out hubs and axle flanges for 5/8" wheel studs with .685 knurl diameter.