Overview
The Baer Brakes 4302342S is a silver 14.0 inch rear disc brake system built for GM small pattern 10/12 bolt axles with a bearing on axle and flush mount bearing housing ends. It pairs a six-piston fixed caliper with a two-piece slotted, drilled, zinc-plated rotor and is set up for 5 on 4.75 and 5 on 5 bolt circle wheels.
Baer’s backing plate serves two roles: it carries the caliper and houses a one-piece park brake shoe assembly, which keeps the park brake inside the same assembly as the service brakes. The kit is a rear-axle package, so it suits owners upgrading the rear brakes on this axle flange rather than a front axle swap.
Key features
- Six-piston 6P fixed caliper with stainless steel pistons, abutments and noise suppression clips
- Staggered pistons designed to reduce uneven pad wear
- Dual dust, weather and pressure seals on the caliper
- Two-piece slotted, drilled, zinc-plated rotor with a billet aluminum hat
- Rotors pre-assembled with NAS high grade stainless hardware
- D0731 pad type, listed with its FMSI number
- Steel braided, DOT approved brake hoses, with stainless hardware included
- Caliper CNC machined from US sourced forged or billet aluminum, powder coated, made in Phoenix, Arizona
Before you buy
A rear disc brake upgrade affects more than stopping force at the wheel. The backing plate, park brake shoes and axle bearing share the same flange, so a change at one point affects the others. Confirm the axle flange, the bearing on axle and the bolt pattern match the axle already under the vehicle. Measure wheel clearance around the caliper body as well, since the rotor and caliper take up more space than a stock setup.
Pad choice should follow both the caliper and the way the vehicle is used. A pad suited to highway driving may fade during repeated trail descents, while a harder compound can wear the rotor faster in daily use. Keep the rotor and pads as a matched set so the braking surface wears evenly.
- Verify the axle flange and bearing type before ordering
- Plan park brake cables separately before assembly
- Allow room for the caliper against the wheel spokes
- Replace pads and rotors together when wear is uneven
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302342S |
| UPC | 844165043959 |
| Color | Silver |
| Caliper | 6P, six-piston, fixed |
| Rotor outside diameter | 14.0 inch |
| Rotor construction | Two-piece, slotted, drilled, zinc-plated |
| Rotor material | Iron with aluminum hat |
| Rotor thickness | 1.15 |
| Pad type | D0731 (FMSI) |
| Axle flange | GM small pattern 10/12 bolt with flush mount bearing |
| Axle housing bearing | Hybrid, 3.150 inch bearing on axle |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 |
| Minimum wheel diameter | 18.0 inch |
| Brake hose | Steel braided, DOT approved |
| Park brake included | Yes |
| Park brake cables included | No |
| Lug nuts included | No |
| Front rotor included | No |
| Template | Q110P |
| Country of origin | US |
Vehicle fitment
Fitment is defined by the rear axle. The kit is built for a GM small pattern 10/12 bolt rear axle flange with a flush mount bearing housing, a 5×4.75/5×5.00 wheel pattern and wheels of at least 18.0 inch diameter. Confirm fit for your vehicle’s year, model and trim before ordering.
This kit fits by axle type and wheel size rather than by vehicle model. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The rotors arrive with pre-assembled stainless hardware, so the rotor and hardware assembly is already done. Use the Q110P template to check clearance against the wheel you plan to run, since no wheel style is guaranteed to fit. Park brake cables are not included, so the one-piece park brake shoe assembly needs cables from another source.
What’s included
The kit includes the six-piston caliper, the two-piece rotor with pre-assembled NAS stainless hardware, the backing plate with its one-piece park brake shoe assembly, and the steel braided hoses with hardware.
Not included: Park brake cables, a front rotor and lug nuts must be sourced separately.
