Overview
The Baer Brakes 4302485HO is a rear disc brake kit in Hugger Orange for Chevrolet and GMC C10 2WD trucks listed from 1960 through 1986, built around a 14.0 inch two-piece rotor and a 6-piston caliper. The kit is meant for housings with large pattern 10/12 bolt C-clip ends and a 5 lug, 5×5.00 inch wheel bolt pattern, as the title and application data specify.
The backing plate does two jobs. It carries the caliper and also houses a one-piece park brake shoe assembly, so the parking brake is built into the rear system rather than added separately. Staggered pistons and the D0731 pad type round out the design, and the rotors arrive pre-assembled with NAS high grade stainless hardware and a billet aluminum hat.
Key features
- Six-piston 6P caliper with stainless steel pistons, abutments and noise suppression clips
- Staggered pistons designed to minimize uneven pad wear
- Dual seals guard against dust, weather and pressure
- Two-piece slotted, drilled and zinc-plated 14.0 inch rotor on a billet aluminum hat
- CNC machined caliper body from forged or billet aluminum with a powder coated finish
- DOT approved steel braided brake hoses with stainless hardware
- Caliper manufactured in Phoenix, AZ
Rear brake upgrade considerations
A rear disc conversion on an older truck changes more than the stopping force at the wheel. The backing plate, the axle flange and the brake line routing all have to work together, so the job is best treated as a system rather than a single part. Rear brakes carry a larger share of braking than many owners expect when the truck is lightly loaded, which makes the rear pads and rotor worth inspecting at regular intervals.
Plan for the parts that often get replaced alongside a caliper kit. Wheel bearings, the hub seal and the brake hose at the axle are commonly checked during the same work. Pads should be bedded in gradually, and the parking brake cable routing should be planned before the old drum is removed. Keep the Q135P template and a tape measure at hand during assembly.
- Inspect rotor thickness and runout before mounting
- Check hose routing for rubbing against the frame or axle
- Bed in new pads gradually before heavy braking
- Recheck caliper bolt torque after the first few drives
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302485HO |
| UPC | 90127878446 |
| Sold as | Kit |
| Caliper | 6P, 6-piston floating |
| Caliper color | Hugger Orange |
| Rotor diameter (rear) | 14.0 inch |
| Rotor type | 2-piece, slotted, drilled, zinc plated, vented |
| Rotor thickness | 1.15 |
| Minimum wheel diameter | 18.0 inch |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 inch |
| Drive | 2WD |
| Axle | Rear |
| Pad FMSI number | D0731 |
| Template | Q135P |
| Hose material | Steel braided, DOT approved |
| Park brake | Shoe assembly in backing plate; cables not included |
| Emission code | 6 |
| Country of origin | USA |
Vehicle fitment
The manufacturer fitment list covers the following: 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.
Four-wheel-drive trucks are not covered, since the application is 2WD. The list also does not include post-1988 C/K pickups. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Baer recommends laying the Q135P template against the wheel you plan to run before mounting, because the 14.0 inch rotor and caliper must clear it. The rotors come pre-assembled, so most of the work is in the backing plate, caliper and hose connections. Check that the parking brake holds before driving the truck.
What’s included
The kit contains the 6P caliper finished in Hugger Orange, two-piece 14.0 inch rotors with pre-assembled stainless hardware, the backing plate with its one-piece park brake shoe assembly, and stainless braided hoses with hardware.
Not included: park brake cables.
