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Wilwood 160-5865 Ultralite 32 Vane Drilled Vented Iron Rotor, 12.19 In

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Specs
Material Type:
Cast Iron
Weight:
8.00
Sold in Quantity:
Each
Finish:
Natural
Inside Diameter:
8.56
Rotor Diameter:
12.19
MFG. Part #:
160-5865
Rotor Thickness:
0.81
Rotor Construction:
Vented
Rotor Hat Bolt Pattern:
8 x 7.00"
Garage Sale:
No
Rotor Location:
Rear
Rotor Shape:
Round
Drilled:
Yes
Slotted:
No
Mount Hole Size:
0.326
Rotor Width:
0.81
Vane Count:
32 V
Rotor Style:
Race Drilled
Bedded:
No
Balanced:
No
Lug ID:
6.38
Wilwood 160-5865 Ultralite 32 Vane Drilled Vented Iron Rotor, 12.19 InWilwood 160-5865 Ultralite 32 Vane Drilled Vented Iron Rotor, 12.19 In
Wilwood 160-5865 Ultralite 32 Vane Drilled Vented Iron Rotor, 12.19 In

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Wilwood 160-5865 Ultralite 32 Vane Drilled Vented Iron Rotor, 12.19 In

Details

Reviews

Q & A

What's in the Box

When it comes to brake rotors, racers are constantly searching for the ultimate balance between the lowest weight and the ability to effectively manage heat. Decreased rotating weight in the drive line provides quicker deceleration under braking and quicker acceleration out of the corners. Lower weight also benefits handling with improved spring and shock control over the unsprung suspension mass. Wilwood's ULD-32 drilled iron rotors provides effective lightweight options for sprints, late models, modifieds, and other competition applications that race in low to medium temperature ranges.

  • Cast from premium grade, long grain carbon iron
  • Close tolerances on face and vane thickness
  • 32 straight vane casting provides superior heat management and long service life
  • Two row, 64 hole pattern - alternates between and directly over each vane
  • Each hole deeply chamfered to eliminate stress points
  • Rotating and unsprung rotor mass reduced by 12%
  • Left or right hand mounting locations

Notes

Caution on Drilled Rotors

There is a common mis-perception that rotors are drilled to improve cooling. The reduced mass of a drilled rotor will dissipate its retained heat quicker, but it also builds up heat a much faster rate. The decision to use drilled rotors should be solely based on the merits of the lower rotating and unsprung weight, and NOT for improved cooling. It is NOT wise to use drilled rotors in sustained high heat on hard braking tracks unless the team budget affords a high frequency of rotor and brake pad replacement.

  • Race drilled rotors are unsafe for street use
  • Suitable applications: Light to moderate Dirt Racing

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. 

Specs

  • Vented iron 
  • Inboard mounted (Sprints)
  • Thickness: 0.81"
  • O.D.: 12.19"
  • Bolt Circle: 8 x 7"
  • Threads:  Thru
  • Weight: 8.6 lbs
  • Face: drilled
  • Rotor Mount Hole Size: .326"
  • Lug ID / Registration: 6.38" 
  • Far Side Inside Diameter: 8.56"

Item Details

0.81" x 12.19"
8 x 7.00" B.C.

You may also be interested in:

Wilwood 160-8136 Ultralite 32 Vane Vented Scalloped Iron Rotor, 12.19
                        

Racers are constantly searching for the ultimate balance between the lowest weight & the ability to effectively manage heat. Decreased rotating weight in the drive line provides quicker deceleration under braking and quicker acceleration out of the corners. Lower weight also benefits handling with improved spring and shock control over the unsprung suspension mass. Wilwood's ULS-32 scalloped iron rotors provides effective lightweight options for sprints, late models, modifieds & other competition applications that race in low to medium temperature ranges.

  • Scallop configuration provides greatest weight reduction on a vented straight vane iron rotor
  • Scallop machining removes as much as three pounds, or nearly 33% of the rotor mass
  • Vented castings provide increased cooling capacity over machined steel plate rotors
  • Improved structural durability over drilled rotor designs
  • Vented iron
  • Inboard mounted
  • Threads:  Thru

Note: Suitable for Light Dirt Racing applications. Scalloped Brake Rotors are unsafe for street use.

Rotor Application Chart (GIF)

Speedway Pro-Lite Vented Brake Rotor, 12.19 x .81 Inch
                        

Every brake rotor is cast from premium grade, long grain carbon iron which exhibits long wear, high thermal stability, and excellent resistance to distortion in high heat. Modern foundry and machining techniques hold close tolerances on face and vane thickness. Combining the correct face thickness with a 32 vane casting provides superior heat management and long service life with low rotating and unsprung weight. The straight vane design also makes it possible to use the same disc brake rotor on left or right hand mounting locations.

  • Thickness: .81"
  • Outside Diameter: 12.19"
  • # Holes: 8
  • Bolt Circle: 7"
  • Thread: Thru
  • Weight: 8.70 lbs

Pro-Lite Rotor Application Chart (GIF)

Wilwood 160-0277 Ultralite 32 Vane Vented Iron Rotor, 12.19 x .810 In.
                        
  • Suitable for moderate temperature racing to street use 
  • Cast from premium grade, long grain carbon iron
  • Long wear, high thermal stability, and excellent resistance to distortion in high heat
  • Close tolerances on face and vane thickness
  • 32 straight vane casting provides superior heat management and long service life
  • Low rotating and unsprung weight
  • Left or right hand mounting locations
  • Inboard mounted (Sprints)
  • Threads:  Thru
  • Weight: 9.1 lbs
  • Face: solid
  • Rotor Mount Hole Size: .326"
  • Lug ID / Registration: 6.38" 
  • Far Side Inside Diameter: 8.56"

Ultralite Rotor Application Chart (GIF)

Speedway Cast Iron Scalloped Brake Rotor - 12.19 x .81 Inch
                        Speedway's premium 32 Vane scalloped cast iron brake rotors weigh only 6.13 lbs. 12.19" x .81", 8 on 7 thru.
                    
Speedway Cast Iron Drilled Scalloped Brake Rotor - 12.19 x .810
                        Speedway's premium 12.19" x .810" drilled & scalloped vented cast iron brake rotors weigh only 5.56 lbs.
                    
AFCO 9850-6221 Straight Vane Brake Rotor, 12.19 x .81 Inch
                        

AFCO's disc brake rotors set the pace for design, quality and performance. Special designed materials, enhanced computer imagery and design, as well as extensive lab and track testing have yielded a superior brake rotor. All AFCO rotors have been optimized for strength, weight, and heat dissipation ability to meet the demands of the serious racer.

  • Premium grade alloys for superb thermal shock stability
  • Machined and blanchard ground to assure precise flatness
  • Precise vane placement for high volume cooling

Instructions (PDF)