Overview
The Baer Brakes 4302340S is a rear disc brake kit from the SS4 Plus line, made for 1960-1987 GM C10 trucks with C-clip axles and large pattern 10/12 bolt housing ends. It is a 6 lug kit for 6×5.5 wheels and pairs a 4-piston S4 caliper with a 13.0 inch vented rotor. The kit is finished in silver.
A park brake shoe assembly sits inside the backing plate, which also serves as the caliper mount. Baer uses the DR1-C pad type on this kit. The 2-piece rotor is slotted, drilled and zinc-plated with a billet aluminum hat, and its listed minimum wheel diameter is 17.0 inch. NAS high grade stainless hardware comes already fitted to the rotors.
Key features
- 2-piece, 4-piston S4 caliper manufactured in Phoenix, Arizona
- Caliper body CNC machined from U.S.-sourced forged or billet aluminum
- Hard anodized aluminum pistons, stainless steel abutments and noise suppression clips
- Dual seals for dust, weather and pressure
- Powder coated finish in silver
- 2-piece slotted, drilled, zinc-plated rotor with billet aluminum hat
- Park brake shoe assembly built into the backing plate
Matching the wheel and axle
Older C10 trucks often still run their original C-clip axles, so the housing end style is the first thing to confirm. A large pattern 10/12 bolt end is different from other GM layouts, and the rotor and backing plate depend on it lining up correctly. Measuring the axle before buying saves a return.
Brake hoses and park brake cables on trucks of this age are often original and worn. Replacing them alongside the rear system keeps the new components working as designed. Compare pad wear and rotor surface with the new parts once the truck is back on the road.
- Measure the axle housing ends before ordering
- Replace old park brake cables when the system is opened
- Inspect rubber lines for cracks or swelling
- Check wheel lug holes for wear on older steel wheels
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302340S |
| UPC | 844165043843 |
| Sold as | Kit |
| Axle | Rear |
| Axle flange | C-clip axles, large pattern 10/12 bolt housing ends |
| Wheel bolt pattern | 6×5.50 |
| Lug count | 6 lug |
| Caliper | S4, 4-piston, floating |
| Caliper color | Silver |
| Pad type | DR1-C (FMSI) |
| Rotor outside diameter | 13.0 inch |
| Rotor thickness | 0.81 |
| Rotor construction | 2-piece, vented, slotted, drilled, zinc plated |
| Rotor material | Iron rotor with aluminum hat |
| Minimum wheel diameter | 17.0 inch |
| Brake hoses | DOT approved |
| Park brake | Included |
| Grade | Performance |
| Fit template | S135H |
| Country of origin | US |
Vehicle fitment
Baer’s manufacturer fitment list for the 4302340S covers these trucks: 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 title specifies 2WD trucks, so compare your drivetrain as well as your model.
Trucks from model years after 1988 are outside this list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Park brake cables are not included, so arrange cables before installation. The C-clip housing ends must match a large pattern 10/12 bolt axle, so confirm your axle before ordering. Check caliper and wheel clearance with the S135H template, and have a qualified brake technician do the work.
What’s included
The kit includes the S4 caliper, the backing plate with its park brake shoe assembly, the 13.0 inch 2-piece rotor with stainless hardware, and DOT approved brake hoses with hardware.
Not included: park brake cables, front rotor and lug nuts.
