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