Overview
The Baer Brakes 4302542CY is a Pro Plus 13.0 inch rear brake system with a Comp Yellow 6-piston caliper, built for 1960 to 1988 Chevrolet and GMC C10-series 2WD trucks fitted with W/OE large pattern 10/12 bolt C-clip housing ends and a 6 lug, 6×5.50 inch wheel pattern. It is sold as a complete kit, so the caliper, rotor, backing plate, hoses and park brake shoe assembly come together as one system.
The backing plate is the centerpiece of the design: it carries the caliper and houses a modern one-piece park brake shoe assembly, which keeps the parking brake inside the same package. The rotor is a two-piece slotted, drilled and zinc-plated unit that comes pre-assembled with NAS high grade stainless hardware. The 13 inch Pro Plus fits most 17 inch or larger wheels, but fit with every wheel style cannot be guaranteed, so compare the Q135H template against your wheel.
Key features
- Two-piece, 6-piston, 6P caliper manufactured in Phoenix, Arizona
- CNC machined from US sourced forged or billet aluminum with a powder coated finish
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons to minimize uneven pad wear
- Dual seals guarding against dust, weather and pressure
- Two-piece slotted, drilled, zinc-plated rotor with a billet aluminum hat
- Designed around the popular D0731 pad type
Before you buy
A rear disc conversion changes more than the brakes at the axle, so it helps to review the whole setup before ordering. Wheel backspacing and offset decide whether a larger rotor clears the spokes or lip of the wheel. The caliper, pads, hoses and master cylinder work together as one hydraulic system, so a change in caliper size can affect pedal feel and should be matched with the rest of the brakes.
Older trucks often have worn axle bearings, seals and brake lines. Those parts are easier to inspect while the hubs and drums are apart, and replacing them at the same time avoids repeat work later.
- Wheel backspacing and offset
- Master cylinder size and fluid level
- Routing of hoses around the axle housing
- Bearing and seal condition
- Pad compatibility with the D0731 type
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302542CY |
| UPC | 90127879160 |
| Sold as | Kit |
| Axle | Rear |
| Drive | 2WD |
| Caliper | 6P, floating, 6 pistons |
| Caliper color | Comp Yellow |
| Rotor type | 2-piece, vented, slotted, drilled, zinc-plated |
| Front rotor outside diameter | 13.0 inch |
| Rear rotor outside diameter | 13.0 inch |
| Rotor thickness | 1.1 |
| Lug count | 6 lug |
| Wheel bolt pattern | 6×5.50 inch |
| Minimum wheel diameter | 17.0 inch |
| Pad FMSI number | D0731 |
| Template | Q135H |
| Hose material | Steel braided, DOT approved |
| Park brake | Included (one-piece shoe assembly); cables not included |
| Hardware | NAS high grade stainless |
| Emission code | 6 |
| Grade | Performance |
| Country of origin | USA |
Vehicle fitment
This kit fits the following vehicles:
- 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
- 1960–1966 GMC Suburban
Trucks outside these entries are not covered. The list has no 1975–1978 GMC C15 except the Suburban, nothing from 1989 onward, and no model years before 1960. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Compare the Q135H template with your intended wheel before the rotor goes on, because wheel clearance depends on that check. The park brake is part of the backing plate, so confirm how your cables will connect, since park brake cables are not included. Rear brake work on an older truck is best left to an experienced installer, because a mistake at the rear axle can cost you stopping power.
What’s included
The kit includes the 6-piston 6P caliper assembly, the two-piece 13.0 inch rotors with pre-assembled NAS high grade stainless hardware, the backing plate with its one-piece park brake shoe assembly, and stainless braided hoses with hardware.
Not included: Park brake cables. The system is built around the D0731 pad type.
