Overview
The Baer Brakes SS4 rear brake kit, part 4302298CY, is a rear disc brake system for GM small-pattern 10/12 bolt C-clip axle housing ends with a 5×4.75/5×5.00 bolt pattern. It pairs an S4 four-piston floating caliper in Comp Yellow with a 12-inch, one-piece, slotted, drilled, zinc-plated vented rotor, and it is sold as a kit.
The backing plate serves as the caliper mount and houses a one-piece park brake shoe assembly, so the parking brake is built into the rear unit. This is a five-lug system, so match the 5×4.75/5×5.00 pattern to your hub before mounting. The 12-inch SS4 is suited to wheels of 16 inches or larger, but fit is not guaranteed on every wheel style, so check clearance with template S113E against the wheel you plan to run.
Key features
- S4 four-piston floating caliper, CNC machined from US-sourced forged or billet aluminum with a powder coated finish.
- Hard anodized aluminum pistons with stainless steel abutments and noise suppression clips.
- Dual dust, weather and pressure seals on the caliper.
- 12-inch one-piece rotor with slotted and drilled faces and a zinc-plated surface, vented construction.
- Pads are DR1 or HB100, with FMSI number DR1-C.
- Braided brake hoses included with the kit.
- Caliper manufactured in Phoenix, Arizona.
Before you mount the rear kit
Rear disc conversions change more than the brake. The rotor sits on the hub, so hub face condition, wheel bolt seating and lug nut torque all affect how smoothly the rotor runs. Clean the hub face and remove rust scale before the rotor goes on, and tighten the lugs in a crossing pattern.
The integrated park brake shoes inside the backing plate need a working cable set to hold the vehicle. Because cables are not part of this package, inspect the existing cables for stretching, corrosion and free travel, and replace any that bind before testing the parking brake on a slope.
Expect a short bedding period for new pads and rotor. Make several moderate stops from modest speed to lay down an even pad layer, then let the system cool before any firm stop. Re-check lug torque after the first few drives.
- Inspect the rotor face for scoring after the first season on the trail
- Check caliper slides and seals at each pad change
- Keep the hoses clear of heat sources and sharp edges
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302298CY |
| UPC | 90127953464 |
| Sold as | Kit |
| Caliper | S4 |
| Caliper color | Comp Yellow |
| Caliper type | Floating |
| Caliper piston quantity | 4 |
| Rotor outside diameter | 12.0 inch |
| Rotor construction | Vented |
| Rotor type | 1-piece |
| Rotor thickness | 1.02 |
| Surface type | Slotted, drilled and zinc plated |
| Axle | Rear |
| Axle flange | GM 10/12 bolt C-clip (small car pattern) |
| Wheel bolt pattern | 5×4.75/5×5.00 |
| Lug count | 5 lug |
| Minimum wheel diameter | 16.0 inch |
| Pad FMSI number | DR1-C |
| Park brake | Included (park brake cables not included) |
| Brake hose DOT approved | Yes |
| Template | S113E |
| Grade type | Performance |
| Emission code | 6 |
| Country of origin | USA |
Vehicle fitment
It is built around a GM small-pattern 10/12 bolt C-clip rear axle flange with a 5×4.75/5×5.00 wheel bolt pattern. Check your axle flange and hub dimensions against the kit before mounting.
Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The minimum wheel diameter is 16.0 inch, so check the S113E template against the wheel before mounting. The park brake shoe assembly sits inside the backing plate, but park brake cables are not included, so the parking brake cable hardware must come from separate parts. Test pedal feel and parking brake holding before driving on public roads.
What’s included
The kit includes the S4 four-piston caliper in Comp Yellow, the 12-inch one-piece slotted and drilled rotor, Baer’s backing plate with the one-piece park brake shoe assembly, and braided brake hoses.
Not included: park brake cables.
