Overview
The Baer Brakes Pro Plus 13.0 inch rear brake system, part number 4302542S, is a rear disc brake kit for GM C10 2WD trucks, model years 60-87. It is built for 6 lug hubs with a 6×5.50 bolt pattern and uses a 6-piston caliper on a 13.0 inch rotor.
The kit uses a 6P six-piston caliper mounted to a two piece slotted, drilled and zinc plated rotor. The rotors come pre-assembled with NAS high grade stainless hardware, and the backing plate serves as the caliper mount while housing a 1-piece park brake shoe assembly. It fits most 17 inch or larger wheels.
Key features
- 6-piston, 6P caliper with staggered pistons to reduce uneven pad wear
- Stainless steel pistons, abutments and noise suppression clips
- Dual seals for dust, weather and pressure
- CNC machined caliper from US sourced forged or billet aluminum
- 2-piece slotted, drilled and zinc plated rotor with billet aluminum hat
- 1-piece park brake shoe assembly in the backing plate
- Stainless braided hoses and hardware included
Setup and clearance checks
A two piece rotor with a billet aluminum hat and a six-piston caliper adds weight and heat capacity to the rear axle. Confirm the axle, hub and bearings can handle that setup before installation, and check that the wheel has enough clearance around the caliper and rotor. Wheel design matters more with a larger rotor.
The park brake shoe assembly sits in the backing plate, and it needs separate cables. Route the cables with clearance for suspension travel and check the adjustment after mounting. Pads for a six-piston caliper wear unevenly across the stack, so inspect them at each service interval and replace pads as a full set.
- Verify the 6×5.50 hub pattern before purchase
- Check pad wear across all six pistons
- Re-torque NAS hardware after the first drives
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302542S |
| UPC | 90127854761 |
| Caliper | 6P, 6-piston, floating |
| Caliper color | Silver |
| Rotor diameter | 13.0 inch |
| Rotor type | 2-piece |
| Rotor construction | Vented |
| Rotor thickness | 1.1 |
| Rotor surface | Slotted, drilled and zinc plated |
| Lug count | 6 lug |
| Wheel bolt pattern | 6×5.50 |
| Minimum wheel diameter | 17.0 inch |
| Drive | 2WD |
| Applications | GM C10 trucks 60-87 |
| Fitment notes | w/OE Large Pattern 10/12 Bolt C-clip (Bih) housing ends, 6 lug (6×5.5 Inch BC) |
| Pad FMSI number | D0731 |
| Hose material | Steel braided |
| Template | Q135H |
| Park brake | Included; park brake cables not included |
| Grade | Performance |
| Country of origin | USA |
Vehicle fitment
The manufacturer fitment list covers 1960-1986 Chevrolet C10, 1967-1986 Chevrolet C10 Suburban, 1987 Chevrolet R10, 1987-1988 Chevrolet R10 Suburban, 1966 GMC 1000, 1960-1965 GMC 1000 Series, 1975-1978 GMC C15 Suburban, 1967-1974 GMC C15/C1500, 1967-1974 GMC C15/C1500 Suburban, 1979-1986 GMC C1500 Suburban, 1987-1988 GMC R1500 Suburban and 1960-1966 GMC Suburban.
The list has no 1987 Chevrolet C10 entry and does not cover 4WD trucks, since this kit is 2WD. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The kit includes the park brake shoe assembly, but park brake cables are not included. Wheel clearance depends on the 17.0 inch minimum wheel diameter, so check Baer template Q135H against your wheel. Work on a securely supported truck and use a torque wrench for all fasteners.
What’s included
Pro Plus 6-piston calipers, 2-piece vented rotors pre-assembled with NAS high grade stainless hardware, backing plate with 1-piece park brake shoe assembly, and stainless braided hoses and hardware.
Not included: Park brake cables.
