Overview
The Baer Brakes 4302485S is a silver Pro Plus rear disc brake system for 1960-1986 Chevrolet C10 and GMC C15 trucks, built for a five-lug 5×5.00 wheel pattern. A 6-piston caliper clamps a 14-inch two-piece slotted and drilled rotor, and the system is intended for rear axle installation on 2WD trucks.
Baer designed the backing plate to carry the caliper while housing a one-piece park brake shoe assembly. Rotors come pre-assembled with high-grade stainless hardware, and braided hoses with hardware are included. The 14-inch rotor suits most wheels 18 inches or larger, although Baer cannot promise fit for every wheel style.
Key features
- Six-piston (6P) caliper in a two-piece layout, produced in Phoenix, Arizona
- CNC-machined aluminum parts made from forged or billet stock sourced in the US
- Powder-coated silver finish
- Stainless pistons, abutments and noise-suppression clips
- Staggered piston arrangement to reduce uneven pad wear
- Dual dust, weather and pressure seals
- Zinc-plated, slotted and drilled rotor with a billet aluminum hat
- Braided hoses rated DOT approved
Hub and wheel matching
Matching the wheel to the hub matters more than most buyers expect. Start by confirming the bolt pattern on the truck, then check the lug seat style, because a wrong seat can loosen under load. Wheel offset and backspacing decide whether the wheel clears the caliper and rotor, so look at both before buying. Many owners find that a wheel which clears the caliper with the stock setup may rub after a tire change, so measure again when the tires are swapped.
Once a wheel is chosen, mount it with the template check still in place, and torque the lug nuts in a star pattern. Re-torque after the first short drive, since new wheels can settle. Keep the rotor hat and pilot clean so the wheel seats flat against it, and avoid stacking spacers, which change the load on the hub and wheel studs.
- Confirm the hub bolt pattern before ordering
- Check lug seat style against the wheel
- Recheck clearance after changing tire size
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302485S |
| UPC | 844165051480 |
| Caliper | 6-piston (6P), floating |
| Caliper color | Silver |
| Rotor outside diameter (rear) | 14.0 inch |
| Rotor thickness | 1.15 |
| Rotor type | 2-piece, slotted, drilled, zinc plated, vented |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 |
| Minimum wheel diameter | 18.0 inch |
| Brake pad FMSI number | D0731 |
| Template | Q135P |
| Axle | Rear |
| Park brake | Included; park brake cables not included |
| Brake hose | DOT approved |
| Country of origin | USA |
Vehicle fitment
Listed fitment runs across 1960-1986 Chevrolet C10 pickups and 1967-1986 C10 Suburban, 1987 R10 and 1987-1988 R10 Suburban, GMC 1000 models from 1960-1966 and 1000 Series from 1960-1965, GMC C15 Suburban from 1975-1978, GMC C15/C1500 from 1967-1974 with Suburban versions, GMC C1500 Suburban from 1979-1986, GMC R1500 Suburban from 1987-1988, and GMC Suburban from 1960-1966.
The list stops at 1986 for Chevrolet C10 pickups even though the product name mentions 1987, and standard-body GMC pickups from 1979 to 1988 are not included. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Check wheel clearance using the Q135P template before the rotor goes on, since wheel styles differ. Park brake cables are not supplied, so arrange them before installation. Brake work is safety-critical, so have a qualified technician install and check the system before the truck is driven.
What’s included
The kit includes the 6P caliper, a backing plate housing a one-piece park brake shoe assembly, two-piece rotors with pre-assembled stainless hardware, and braided hoses with hardware.
Not included: park brake cables.
