Overview
The Baer Brakes SS4 Plus rear brake system, part number 4302339FR, is a Fire Red 2WD rear disc brake kit for 1960 to 1988 Chevrolet and GMC C10 trucks with 5 lug, 5×5.00 hubs. The housing ends are the large pattern 10/12 bolt C-clip type.
A four-piston S4 caliper clamps a 13 inch, two-piece rotor that is vented, slotted, drilled and zinc plated. The backing plate carries the caliper and also contains the park brake shoes as a single modern one-piece assembly. Wheel fit depends on the chosen wheel, so check it with the S135H template before installation.
Key features
- S4 four-piston caliper with hard anodized aluminum pistons and stainless steel abutments
- Dual dust, weather and pressure seals
- Two-piece 13.0 inch vented rotor with billet aluminum hat
- Slotted, drilled and zinc-plated rotor face
- Factory-assembled rotors with NAS high grade stainless hardware
- One-piece park brake shoe assembly
- Steel braided, DOT approved brake hoses included
- Powder coated finish; made in Phoenix, AZ
Before you install
A rear disc conversion changes more than the brake hardware, so plan the work around the whole axle. Start by confirming that the hub, bearing and axle setup match a five lug, 5×5.00 pattern, then test fit the wheel with the template before the rotor goes on. Clearance around the caliper and rotor should be checked with the wheel mounted, since a shifted hub or worn bearing can change how the rotor sits.
The park brake shoes sit inside the backing plate, but cables are a separate purchase. Compare the existing cable length and routing with the new setup before removing the old parts, because a cable that is too short or pinched will prevent the parking brake from holding. Keep the old hardware until the new pieces are confirmed to fit.
- Check hub pattern and wheel clearance before assembly
- Inspect the existing wheel bearings and seals
- Plan for separate park brake cables
- Replace pads and rotors as a matched set
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302339FR |
| UPC | 90127878668 |
| Kit type | Kit |
| Caliper | S4, four-piston, floating type |
| Caliper color | Fire Red |
| Rotor type | Two-piece, vented |
| Rotor outside diameter | 13.0 inch |
| Rotor thickness | 0.81 |
| Rotor surface | Slotted, drilled and zinc plated |
| Rotor hat | Billet aluminum |
| Pad type | DR1-C |
| Brake hose | Steel braided, DOT approved |
| Park brake | Included, one-piece shoe assembly |
| Park brake cables | Not included |
| Minimum wheel diameter | 17.0 inch |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 |
| Axle | Rear |
| Drive | 2WD |
| Template | S135H |
| Emission code | 6 |
| Grade type | Performance |
| Country of origin | USA |
Vehicle fitment
Fitment data for this kit lists:
- 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 and C15/C1500 Suburban
- 1979–1986 GMC C1500 Suburban
- 1987–1988 GMC R1500 Suburban
- 1960–1966 GMC Suburban
The list covers 2WD trucks only and stops at 1988, so 4WD trucks and later model years are not included. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Fit the S135H template to the wheel first and confirm the 17.0 inch minimum diameter. The hub must be five lug at 5×5.00. Let a qualified technician handle the park brake setup and hydraulic bleeding, because errors here reduce stopping power.
What’s included
The kit contains the S4 calipers, two-piece rotors with factory-assembled stainless hardware, the backing plate and park brake shoe assembly, and steel braided hoses with hardware.
Not included: park brake cables.
