Overview
The Baer Brakes 4302266R is a red 14.0 inch Pro Plus rear brake kit for GM small pattern 10/12 bolt bearing-on-axle housings, covering the 5×4.75 and 5×5 bolt patterns. Its core is a six-piston fixed caliper clamping a two-piece slotted, drilled rotor, and it fits rear axles with non-flush mount housing ends. Confirm fit for your vehicle’s year, model and trim before ordering.
The backing plate doubles as the caliper mount and houses a one-piece park brake shoe assembly, so parking braking is built into the rear unit. The 14 inch Pro Plus suits most wheels of 18 inch or larger. It cannot match every wheel style, so check the system against your intended wheel before buying.
Key features
- Six-piston (6P) caliper with staggered pistons that help even out pad wear
- Stainless steel pistons, abutments and noise suppression clips
- Dual seals guarding against dust, weather and pressure
- Two-piece slotted, drilled, zinc-plated rotor with a billet aluminum hat
- Rotors arrive pre-assembled with NAS high grade stainless hardware
- One-piece park brake shoe assembly built into the backing plate
- Steel braided hoses meeting DOT requirements
- Red powder coated finish on CNC machined parts of US-sourced forged or billet aluminum
Before you buy
Rear brake kits like this one work on a different scale from stock setups, and the caliper, rotor and backing plate have to match the axle flange and bolt pattern as a set. A larger rotor changes how much clearance the wheel needs, so backspacing and inner barrel room matter as much as the bolt pattern. Park brake function on a rear kit depends on shoe adjustment and cable routing, so check both during setup.
Wear usually shows first in pad thickness and rotor surface. Slotted and drilled rotors shed water and gas more readily, but they can crack under heavy heat if the pads or fluid are poor. Inspect the braided lines for chafing and cracking, and bleed the system after any hose or caliper work. Re-torque the wheel lugs after the first few drives.
- Match the wheel’s backspacing and inner clearance to the rotor
- Plan a separate set of park brake cables if your setup uses them
- Choose pads and fluid suited to heavy braking
- Check the lines for chafing at each service
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302266R |
| UPC | 844165043164 |
| Sold as | Kit |
| Caliper | 6-piston (6P), fixed, red |
| Disc brake rotor (rear) outside diameter | 14.0 inch |
| Rotor type | Two-piece, vented, slotted, drilled, zinc plated |
| Rotor material | Iron with aluminum hat |
| Axle | Rear |
| Axle flange | GM small pattern 10/12 bolt bearing on axle (Buick/Olds/Pontiac) |
| Axle housing flange type | Bearing on axle, hybrid |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 lug |
| Minimum wheel diameter | 18.0 inch |
| Brake pad FMSI number | D0731 |
| Brake hose | Steel braided, DOT approved |
| Park brake | Included, one-piece shoe assembly |
| Country of origin | US |
Vehicle fitment
The kit is built for the GM small pattern 10/12 bolt bearing on axle flange used on Buick, Olds and Pontiac rear axles. Confirm your housing flange, bolt pattern and wheel clearance before ordering.
The kit is made for bearing-on-axle, non-flush housing ends and does not suit axles with another flange design or bolt pattern. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Park brake cables are not included, so a separate set is needed if your parking brake setup uses them. Check wheel clearance against the wheel you plan to run before mounting the rotors. Installation is best left to a qualified installer who has matched the housing flange to this kit.
What’s included
Two-piece rotors come pre-assembled with NAS high grade stainless hardware, along with six-piston calipers, the backing plate with park brake shoe assembly, and stainless braided hoses with hardware, all in red.
Not included: lug nuts, park brake cables and front rotor.
