Powerlite Caliper – Part No: 120-15737
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Powerlite Radial Mount
Prod #: 120-15737
Price: $351.61

Powerlite Radial Mount - Product Summary
Caliper No: 120-15737
Powerlite Radial Mount

Piston Count 4
Piston Area (in²) 3.00
Piston Type Thermlock
Dust Boot No
Rotor Dimensions
Rotor Width (in) 0.86
Rotor Diameter(in) 11.00
Pad Dimensions
Pad Area (in²) 5
Pad Volume (in³) 1.8
Duty Rating & Material
Material Forged Aluminium
Weight(Lbs) 2.8
Colors & Finish
Color Anodize
Finish Type III Anodize

Mount Center(in) 5.08
Mount Position
Mount Side Universal
Mount Type Radial
UPC Number
UPC 889545091977
Product Documents
Product Data Sheet

Click To Download
Installation Instructions

WARNING: Cancer and Reproductive Harm
Applicable to Brake Pads Only

120-15737 - Product Description

Powerlite Radial Mount

The Wilwood Powerlite-ST four piston radial mount caliper starts at 2.5 pounds with a sleek profile, superior strength, lightweight and durable in higher temperature situations. Easily adapted to a wide range of rally, circle track and off road driving applications. The addition of Wilwood's exclusive Thermlock pistons further insulate the caliper from high rotor temperatures.

Strength comes from a combination of process and design. The process of stress-flow forging re-aligns the metal's grain structure within the contour of the caliper body. This eliminates the stresses and interruptions to the internal grain structure that occur when machining a straight block billet. The FEA generated radial transition design eliminates steps and shoulders in the area between the piston housing body and the caliper bridges. Incorporating a radius in this critical area substantially increases resistance to deflection and caliper separation under load.

The Powerlite uses a new 7912 type brake pad that is supported from the top by Quick-clip pad retainers. This eliminates the need for a pad support step in the bottom of the caliper and adds additional clearance for mounting closer to the hub on small wheel and rotor applications. The pad radius matches to rotor diameters between 9.45" (240,0 mm) and 11.75" (298,5 mm), and the caliper fits easily inside many 13.00" (330,2) wheel applications. The Quick-Clips also accommodate easy pad access without caliper removal. Brake pad compounds are available for the full range of sport and competition applications.

Product Specifications

Rotor Compatibility
Rotor Width (in) 0.86
Maximum Rotor Width (in) 0.86
Minimum Rotor Width (in) 0.79
Maximum Rotor Diameter(in) 11.00
Minimum Rotor Diameter(in) 9.45

Brake Pad Specifications
Brake Pad Type 1 7912
Brake Pad Type 2 N-A
Brake Pad Type 3 N-A
Total Pad Area (in²) 5
Total Pad Volume (in³) 1.8
Piston Specifications
Piston 1 Bore (in) 1.38
Piston 2 Bore (in) 1.38
Piston 3 Bore (in)
Total Piston Area (in²) 3.00

Mounting Specifications
Mount Type Radial
Mount Side Universal
Mount Center(in) 5.08
Mount Hole Size(in) 0.40
Mount Height(in) 1.56
Inlet Thread Size 1/8-27 NPT
Pad Dimensions & Part Numbers
Pad Dimensions for the Powerlite Radial Mount Pad Dimensions for the Powerlite Radial Mount Zoom Image
Axle Set P/N
Pad Type
Non-Bedded Pads - by Compounds
PolyMatrix A
PolyMatrix B
PolyMatrix E
Mount Dimensions for the Powerlite Radial Mount Mount Dimensions for the Powerlite Radial Mount Zoom Image
Mount Dimensions & Part Numbers

Dimensions for the Powerlite Radial Mount Dimensions for the Powerlite Radial Mount Zoom Image

Additional Notes

Every caliper is equipped with Wilwood's SRS stainless steel bridge plates. The SRS plates eliminate the bridge wear caused by pad gouging. The spring-loading action of the SRS plates also eliminates pad rattle and dampens the vibration harmonics that contribute to squeal under braking. Internal fluid passages eliminate the need for external tubes. Four corner bleed screws assure simple and effective air evacuation and allow one caliper to be mounted in of four positions.

Bracket kits are used to install the calipers in place of most lug mount calipers. Radial mounting simplifies service and the bracket kits provide two planes of adjustment for precise alignment over the disc. Bracket kits include the radial mount bracket, studs, locknuts, and caliper alignment shims.

Parts & Accessories

O-Ring Kit 130-2658
Replacement Dust Boot N-A
Replacement Piston 1 200-15451
Replacement Piston 2 200-15451
Replacement Piston 3 N-A
Replacement Piston 4 N-A
Cross-Over O-Ring Kit 130-10540
Bridge Bolt Kit N-A
Wear Plate L/H 300-5875
Wear Plate R/H 300-5875
Pad Retainer 300-8697
Bleed Screw Kit 220-6069
Self Bleeder Tube N-A
Cross-Over Tube N-A
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Version: 3.05 June 23, 2023