Overview
The Baer Brakes 4302339B is a black SS4 Plus rear brake kit for Chevrolet and GMC C10-series trucks from 1960 to 1987, built for 2WD models with 5 lug, 5×5.00 wheels and large pattern 10/12 bolt C-clip housing ends. It pairs a four-piston S4 caliper with a 13 inch slotted, drilled rotor in a single rear assembly.
The backing plate carries the caliper and a one-piece park brake shoe assembly in the same housing. The 13 inch rotor is made for wheels 17 inches or larger, and the caliper is finished in black.
Key features
- S4 four-piston caliper, CNC machined from US-sourced forged or billet aluminum
- Anodized aluminum pistons paired with stainless steel abutments and noise suppression clips
- Dual seals that guard against dust, weather and pressure, which Baer calls T compliant
- Two-piece slotted, drilled, zinc-plated rotor on a billet aluminum hat
- Integrated one-piece park brake shoe assembly in the backing plate
- Steel braided, DOT approved brake hoses included
- Powder coated finish with a black caliper
Before you buy
A rear brake kit is one part of a system that includes the axle, the hub, the wheel and the parking brake. Before buying, measure the axle housing ends and confirm the lug count and bolt circle match the wheels on the truck. Larger rotors and calipers often need wheels with enough clearance, so check the template against the wheel you plan to run. Because the park brake shoe sits inside the backing plate, the parking function depends on the rear assembly working as one unit.
Worn rear brakes often show uneven pad wear, a pulsing pedal or grooves on the rotor face. Inspect brake hoses for cracking or swelling, and check pads against the friction code before reusing them. Replacing pads, hoses and hardware together with the new rotor helps keep the system balanced.
- Measure housing ends before ordering
- Match wheel clearance to the caliper
- Inspect the parking brake cable routing
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302339B |
| UPC | 844165043768 |
| Sold as | Kit |
| Caliper | S4, four-piston, floating |
| Caliper color | Black |
| Rotor outside diameter | 13.0 inch |
| Rotor type | 2-piece, vented |
| Rotor style | Slotted, drilled, zinc plated |
| Rotor material | Iron with aluminum hat |
| Rotor thickness | 0.81 |
| Minimum wheel diameter | 17.0 inch |
| Pad type (FMSI) | DR1-C |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 |
| Drive | 2WD |
| Axle housing flange | C-clip axles, large pattern 10/12 bolt housing ends |
| Brake hose | Steel braided, DOT approved |
| Park brake | Included |
| Template | S135H |
| Emission code | 6 |
| Country of origin | US |
Vehicle fitment
It fits 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.
Trucks from 1989 onward fall outside this fitment range, and 4WD trucks are outside the 2WD configuration. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Rotors come pre-assembled with NAS high grade stainless hardware. Because Baer cannot guarantee wheel fit across wheel styles, compare the S135H template with the wheel you plan to use before fitting. Brake components are safety-critical, so have a qualified technician check the finished installation.
What’s included
The kit includes the black S4 four-piston caliper, pre-assembled two-piece 13 inch rotors, the backing plate with park brake shoe assembly, and stainless braided hoses with stainless hardware.
Not included: park brake cables, lug nuts and front rotors.
