Overview
The Baer Brakes SS4 rear brake kit in Desert Sand, part number 4402007DS-2, gives Jeep Wrangler JK, Wrangler JL and Gladiator JT owners with the factory rear end a rear disc brake system built around a 4-piston S4 caliper and a 13.0 inch vented rotor.
The caliper is finished in Desert Sand and takes the popular DR1-C pad type, FMSI number DR1-C. Dual seals guard against dust, weather and pressure. Each rotor arrives assembled with NAS high grade stainless hardware, and every mounting bracket and fastener is included. The SS4 Plus rotor is designed to fit most wheels 17 inch or larger, but wheel style clearance should be checked against the S193H template before mounting.
Key features
- Two-piece 4-piston S4 caliper built in Phoenix, Az
- CNC machined aluminum from US-sourced forged or billet stock
- Desert Sand powder coated finish
- Hard anodized aluminum pistons paired with stainless steel abutments
- Noise suppression clips in the caliper hardware
- Dual dust, weather and pressure seals
- One-piece slotted, zinc-plated vented rotor
- Floating caliper with pre-assembled stainless hardware
Before you buy
Rear disc brakes do most of the stopping work on a Wrangler or Gladiator, and a caliper that drags, sticks or pulls under braking shows up quickly at the rear axle. When choosing a rear kit, match the rotor and caliper to your wheel clearance, your axle setup and the pad type your current brakes use. Wheel offset and tire size can also affect clearance around the caliper. A rotor and caliper swap is a good time to inspect the wheel bearings, the parking brake components and the brake lines that remain in place.
Pads wear faster when a caliper slide is stiff, and rotors develop a lip if pads are worn down to the backing plate. After the first few drives, re-check the torque on brackets and wheel fasteners and look for heat discoloration on the rotor face. Bed in new pads gently before any hard braking.
- Pad thickness and rotor face condition
- Hose condition and fluid level after installation
- Pedal feel before the first trip
- Parking brake adjustment after the rear work
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4402007DS-2 |
| UPC | 90127995532 |
| Caliper | S4, 4-piston, floating |
| Caliper color | Desert Sand |
| Caliper finish | Powder coated |
| Rotor outside diameter | 13.0 inch |
| Rotor type | 1-piece, slotted and zinc plated, vented |
| Rotor thickness | 0.81 |
| Minimum wheel diameter | 17.0 inch |
| Lug count | 5 Lug |
| Wheel bolt pattern | 5×5.00 in |
| Pad type | DR1-C (FMSI) |
| Template | S193H |
| Axle | Rear |
| Park brake | No, re-uses OE |
| Brake hoses | Not included |
| Country of origin | USA |
Vehicle fitment
It fits the 2007–2018 Jeep Wrangler (JK), the 2018–2025 Jeep Wrangler (JL) and the 2020–2025 Jeep Gladiator (JT), each with the w/OE Rear End.
Vehicles outside those models, including the Wrangler TJ or LJ, the Jeep Liberty and the Cherokee XJ, are not covered by this kit. Confirm fit for your vehicle’s year, model and trim before ordering.
Installation notes
The rotors come pre-assembled and the brackets and hardware are supplied, so installation centers on mounting the rotor and caliper assemblies at the rear. Brake hoses are not part of the kit, and the parking brake re-uses your OE components. Check wheel clearance using the S193H template against the 17.0 inch minimum wheel diameter. Because this is a braking system, have a qualified technician verify the work before the vehicle is driven.
What’s included
Sold as a kit: S4 calipers, pre-assembled 1-piece rotors with NAS high grade stainless hardware, and all mounting brackets and hardware.
Not included: Brake hoses.
