Overview
The Baer Brakes 4302468S is a silver SS4 rear disc brake system for Chevrolet and GMC C10, C15 and R-series 2WD trucks, covering the listed years from 1960 through 1988. It is designed for the five-lug, 5×5 inch bolt pattern and the large pattern 10/12 bolt C-clip housing ends. The system pairs a four-piston S4 caliper with a 12-inch, one-piece slotted, drilled and zinc-plated rotor.
The backing plate doubles as the caliper mount and houses a one-piece park brake shoe assembly, so the parking function is built into the rear assembly. The 12 inch SS4 fits most 16 inch or larger wheels. Pads are the DR1 or HB100 type under FMSI number DR1-C, and the stainless braided hoses are included.
Baer manufactures the SS4 in Phoenix, Arizona from US-sourced forged or billet aluminum. Installation is aided by the fact that the caliper and backing plate arrive as a complete unit, which reduces the number of separate parts you need to track on the bench.
Key features
- Two-piece, four-piston S4 caliper built in Phoenix, Arizona
- CNC machined from US-sourced forged or billet aluminum
- Hard anodized aluminum pistons with stainless steel abutments and noise suppression clips
- Dual seals covering dust, weather and pressure, plus T-compliant dust and weather seals
- One-piece slotted, drilled, zinc-plated rotor
- Backing plate with an integrated one-piece park brake shoe assembly
- Steel braided, DOT-approved brake hoses included
Choosing the right setup
A rear disc system on a five-lug truck starts with confirming the bolt pattern, housing flange and wheel diameter. The SS4 caliper is a floating design, so its pads and slide hardware should move freely each time the brake is used. Check that the rotor sits flat against the hub face during mounting, since runout can cause pulsing under braking.
The integrated park brake shoes in the backing plate mean the parking function depends on that assembly being set up correctly. Test the parking hold before driving. Many owners replace the brake hoses and bleed the system at the same time, and fresh fluid is a good habit with any disc upgrade.
- Confirm bolt pattern and housing flange before buying
- Check cable routing if your truck uses cable parking hardware
- Bed in new pads after the first installation
- Inspect rotor surface for scoring at each service
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302468S |
| UPC | 844165050834 |
| Caliper | S4, four-piston, floating |
| Caliper color | Silver |
| Disc brake rotor outside diameter | 12.0 inch |
| Rotor type | 1-piece, vented |
| Rotor surface | Slotted, drilled and zinc plated |
| Pad FMSI number | DR1-C |
| Brake hose | Steel braided, DOT approved |
| Park brake | Included; park brake cables not included |
| Minimum wheel diameter | 16.0 inch |
| Wheel bolt pattern | 5×5.00 (5 lug) |
| Axle housing flange type | 10 bolt, 12 bolt |
| Fitment template | S113E |
| Sold as | Kit |
| Country of origin | US |
Vehicle fitment
The manufacturer fitment list for this kit includes 1960-1986 Chevrolet C10 trucks, 1967-1986 Chevrolet C10 Suburban, 1987 and 1987-1988 Chevrolet R10 and R10 Suburban, 1966 GMC 1000 and 1960-1965 GMC 1000 Series, 1975-1978 GMC C15 Suburban, 1967-1974 GMC C15/C1500 and Suburban, 1979-1986 GMC C1500 Suburban, 1987-1988 GMC R1500 Suburban, and 1960-1966 GMC Suburban.
This kit is for five-lug 5×5 inch housings. Six-lug rear ends are not covered, and models or years outside the list above, including later GM trucks, are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Compare the S113E template with your planned wheel before mounting, since fit across every wheel style cannot be assured. The park brake shoes sit in the backing plate. Park brake cables are not included, so confirm your existing cable setup before final assembly.
What’s included
The kit includes the S4 rear calipers, one-piece rear rotors, the backing plates with park brake shoe assemblies, and steel braided brake hoses.
Not included: front rotor, park brake cables and lug nuts.
