Rear Brake Kit – Part No: 140-9838-R
Call (805) 388-1188
AERO4 Big Brake Truck Rear Brake Kit
Prod #: 140-9838-R
Price: $2,560.58
Rear Brake Kit - Rear Kit


Kit Contents
Wilwood AERO4 Big Brake Truck Rear Brake Kit Parts Laid Out - Red Powder Coat Caliper - GT Slotted Rotor Wilwood AERO4 Big Brake Truck Rear Brake Kit Parts Laid Out - Red Powder Coat Caliper - GT Slotted Rotor Zoom Image


View Custom Caliper Colors

Kit Summary
Rear End Axle: OEM
Axle Offset: 0.00
Mount Type: Radial
Caliper Type: 4 - Red Powder Coat
Rotor Diameter: 14.25
Min Wheel Diameter Req'd*: 18
*This Brake Kit may fit 18-inch wheels. Please refer to the wheel clearance diagram to check to see if it will fit your specific wheel. Wheel Clearance Diagram
UPC Number
UPC 889545032512

WARNING: Cancer and Reproductive Harm
www.P65Warnings.ca.gov
Applicable to Brake Pads Only


AERO4 Big Brake Truck Rear Brake Kit

AERO4 Big Brake rear axle kits replace the factory disc brakes and use the OE parking brake assembly as a compliment to front big brake upgrades on late model trucks and SUV’s. High capacity braking from the AERO4 calipers, BP-10 compound pads, and oversized rotors are matched to the OE master cylinder output, ABS function, and individual vehicle bias requirements. Enhanced brake performance, increased durability, and high-tech style compliment big wheel, tire, and suspension upgrades on customized vehicles, tow rigs, and all others with increased brake requirements from high GVW.


Fitment & Installation Details

AERO4 Big Brake Truck Rear Brake Kit Assembly Schematic

AERO4 Big Brake Truck Rear Brake Kit Assembly Schematic AERO4 Big Brake Truck Rear Brake Kit Assembly Schematic Zoom Image

Rear End / Axle Housing Flange
Confirm The Configuration!

OEM Flange 		Confirm Offset Measurement!

Axle Flange Cross-Section
Search Rear Kits By Rear End/Axle Offset
caution AXLE OFFSET: 0.00
Check the diagram above and verify this measurement. This kit may be available in several different offsets.
Please call Wilwood with any questions: (805) 388-1188

Wheel Clearance Assembly Instructions

Wheel Clearance Diagram Wheel Clearance Diagram Zoom Image
Part 1
Notes
1. For OE rears with dual piston calipers.

Compatible Vehicles for this Brake Kit

BRAKE KIT:   AERO4 Big Brake Truck Rear Brake Kit

This Brake Kit is Compatible with the Following Vehicle Makes:   Chevrolet GMC

Note: Kit may fit other vehicles, call Wilwood Sales⁄Tech Support at (805) 388-1188 for more information.

REAR END:   OEM - Rear Kit

AXLE OFFSET:   0.00

For a Complete Listing including ALL Makes, Models and Years, Please click on the Axle Offset.
fitment 1
Offset: 0.00


Kit Components & Specifications
Calipers
Left Hand - Part No: 120-13286-RD
Right Hand - Part No: 120-13285-RD
Type: AERO4
Finish Color: Red Powder Coat
Piston Count: 4
Piston 1 Bore (in): 1.88
Piston 2 Bore (in): 1.62
Piston Area (In²): 4.84
Piston Type: Stainless
Mount Type: Radial
Brake Pad Plate: 6617
Brake Pad Area (In²): 11.1
Brake Pad Volume (In³): 5.2
Pad Compound: BP-20
AERO4 Caliper - Red Powder Coat AERO4 Caliper - Red Powder Coat Zoom Image
Rotors
Left Hand - Part No: 160-16193-GTB
Right Hand - Part No: 160-16193-GTB
Type: GTB Vented Rotor & Hat
Style: GT Slotted
Surface Finish: Black Electro Coat
Material: Iron
Outside Diameter (in): 14.25
Width (in): 1.25
Vane Count: 48 V
Design Type: GT-BLK
Bedded: No
Dynamically Balanced: No
GTB Vented Rotor & Hat - Iron - Black Electro Coat GTB Vented Rotor & Hat - Iron - Black Electro Coat Zoom Image
Rotor Hats
Hat - Part No:
Type:
Material:
Finish Color:
Hat Offset Dimension (in):
Bolt Circle 1:
Bolt Circle 2:
Bolt Circle 3:
Stud Diameter - BC 1:
Stud Diameter - BC 2:
Stud Diameter - BC 3:
Hubs
Hub - Part No:
Type:
Material:
Finish Color:
Mount Style:
Bolt Circle 1:
Bolt Circle 2:
Bolt Circle 3:
Stud Diameter - BC 1:
Stud Diameter - BC 2:
Stud Diameter - BC 3:

Parts & Accessories
Caliper Parts
O-ring Kit: 130-5100
Replacement Dustboot: N-A
Replacement Piston 1: 200-7521
Replacement Piston 2: 200-7519
Replacement Piston 3: N-A
Replacement Piston 4: N-A
CrossOver O-Ring Kit: N-A
Crossover Tube: N-A
Self-Bleeder Tube: N-A
Bridge Bolt Kit: N-A
Wear Plate - Left Hand: 300-5876
Wear Plate - Right Hand: 300-5876
Pad Retainer: 180-9874
Bleed Screw Kit: 220-0627
Brake Lines
Front Line Kit:
 Front Line Kit:
 		220-9886
 220-11196
Hat
Bolt Kit:
Hub
Bolt Kit:
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Version: 3.05 June 23, 2023