Overview
The Baer Brakes 4302299B is a black Pro rear brake package for the 2006–2009 Chevrolet Trailblazer SS, covering 2WD and AWD versions that keep the factory rear axle. Its 6P six-piston caliper clamps a 14-inch slotted and drilled rotor that carries a zinc-plated finish.
Baer’s notes describe a complete rear approach: the hub assemblies come with bearings and races already in place and packed with Redline synthetic grease. The stainless steel pistons and staggered piston layout are meant to hold up well and keep the pads wearing evenly.
Key features
- Two-piece 6P caliper with six pistons, made in Phoenix, Arizona
- CNC machined from US-sourced forged or billet aluminum
- Powder coated finish in black
- Stainless steel pistons, abutments and noise suppression clips
- Staggered pistons to minimize uneven pad wear
- Dual seals for dust, weather and pressure
- 1-piece slotted, drilled and zinc-plated rotor
Before you buy
Rear brake parts work as a set with the front brakes and the hydraulic system. Under braking, the rear calipers and rotors share the load, and their balance affects how the vehicle stops in a straight line and how stable it feels when slowing on a curve. When a rear kit is replaced, it helps to inspect the front pads, rotors and brake fluid so the two ends work together.
Off road, rear brakes see heavy use during long descents and when towing or carrying cargo. Heat builds quickly in a rotor, so keeping pads in good condition and making sure the caliper slides move freely reduces the chance of fade. Regular brake fluid service also matters, since moisture lowers its boiling point.
- Check pad thickness and wear pattern at every wheel removal
- Look for scoring, cracks or heavy rust on the rotor face
- Confirm the parking brake cable adjusts and holds the vehicle
- Replace the hub bearings if they feel rough or loose
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302299B |
| UPC | 844165043461 |
| Package type | Kit |
| Caliper | 6P, six-piston |
| Caliper color | Black |
| Rotor diameter | 14 inch |
| Rotor construction | 1-piece |
| Rotor material | Iron |
| Rotor surface | Slotted, drilled, zinc plated (SDZ) |
| Axle | Rear |
| Drive | 2WD, AWD |
| Minimum wheel diameter | 18.0 inch |
| Box count | 2 |
| Hose material | Re-uses OE hoses |
| Park brake | Yes |
| Template | Q233P |
| Emission code | 6 |
| Country of origin | US |
Vehicle fitment
The kit is built for the 2006–2009 Chevrolet Trailblazer (SS) in both 2WD and AWD versions, and it fits stock SS wheels with an 18.0 inch minimum wheel diameter.
Other GM models and Trailblazer years outside 2006–2009 are not on this entry. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The Trailblazer hubs come pre-built, so the job is mostly attaching them to the control arms while keeping the factory OE hoses, as the listed hose material indicates. Check those hoses for condition before reuse. Brake components carry safety risk, so a qualified technician should handle the installation.
What’s included
The kit includes the 6P caliper, the 14-inch rotor and the hubs with bearings and races installed. The park brake is included, and the box count is 2.
Not included: lug nuts and the front rotor.
