Overview
The Baer Brakes 4402007R-2 is a red SS4 rear brake kit for the 2007–2018 Jeep Wrangler JK, 2018–2025 Jeep Wrangler JL and 2020–2025 Jeep Gladiator with the original rear end. A 4-piston S4 caliper clamps a 13-inch vented rotor, and the caliper carries a red finish.
Dual seals on the caliper guard against dust, weather and pressure. The pistons are hard anodized aluminum running on stainless steel abutments, and noise suppression clips are part of the build. The rotor is a one-piece, slotted, zinc-plated design that uses DR1-C pads. Rotors come pre-assembled with NAS high grade stainless hardware, and all mounting brackets and hardware are included. The 13-inch SS4 Plus fits most wheels 17 inches or larger, but wheel designs vary, so compare your wheel against the S193H template before ordering.
Key features
- 4-piston S4 floating caliper in red
- 13.0-inch vented rotor, one-piece and slotted
- Zinc-plated rotor surface
- Hard anodized aluminum pistons and stainless steel abutments
- Noise suppression clips
- Dual dust, weather and pressure seals
- Pre-assembled rotors with NAS high grade stainless hardware
- DR1-C pad type
Before you buy
Rear disc brakes do most of their work when the vehicle slows from speed, with the caliper and rotor sharing that load alongside the pads. A kit like this changes the clamping hardware at the back of the vehicle, so it is worth considering how it will work with the front brakes. Many owners who upgrade the rear find the front pads and rotors are due for attention at the same time, since a balanced system brakes more predictably.
Wheel choice matters more than many buyers expect. Rotor clearance depends on the wheel’s offset, spoke layout and backspacing as well as diameter, so confirm clearance before the kit is mounted. Tires and wheels much heavier than stock also change how the brakes feel under hard use, so keep that in mind when planning a build.
- Check hoses for cracks, swelling and seepage before reassembly
- Inspect the rotor surface for scoring after the first few trail runs
- Bed in new pads gently before heavy use
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4402007R-2 |
| UPC | 90127995587 |
| Caliper | S4, 4-piston, floating |
| Caliper color | Red |
| Rotor | 13.0-inch, 1-piece, vented, slotted and zinc plated |
| Rotor thickness | 0.81 |
| Minimum wheel diameter | 17.0 inch |
| Pad FMSI number | DR1-C |
| Template | S193H |
| Lug count | 5 lug |
| Wheel bolt pattern | 5×5.00 inch |
| Axle | Rear |
| Parking brake | Re-uses OE parking brake |
| Brake hoses | Not included |
| Grade | Performance |
| Sold as | Kit |
| Country of origin | USA |
Vehicle fitment
Fitment covers the 2007–2018 Jeep Wrangler (JK), 2018–2025 Jeep Wrangler (JL) and 2020–2025 Jeep Gladiator, each with the OE rear end.
Pre-2007 Wrangler models, including the TJ and LJ, and Cherokee or Grand Cherokee models fall outside this fitment. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The factory parking brake is re-used, and brake hoses are not included, so inspect your current hoses before the new red caliper goes on. Check wheel clearance against the 17.0-inch minimum wheel diameter with the S193H template. Brake work is safest when handled by a technician experienced with rear disc systems.
What’s included
The kit contains the red S4 caliper, the pre-assembled 13.0-inch rotor, and the mounting brackets and hardware needed to fit them.
Not included: brake hoses. Check the package contents against your installation before starting.
