Overview
The Baer Brakes 4402007S-2 is a silver SS4 rear brake system kit for the 2007–2018 Jeep Wrangler JK, 2018–2025 Jeep Wrangler JL and 2020–2025 Jeep Gladiator with the factory rear end. It pairs a 4-piston S4 caliper with a 13-inch vented rotor, giving owners of these Jeeps a complete rear disc brake upgrade built around the original axle.
The rotors arrive pre-assembled with NAS high grade stainless hardware, and all mounting brackets and hardware are included. Each caliper uses hard anodized aluminum pistons, stainless steel abutments, noise suppression clips and dual dust, weather and pressure seals. The rotor is a one-piece, slotted, zinc-plated unit set up for DR1-C pads. The 13-inch SS4 Plus suits most 17-inch or larger wheels, but fit is not guaranteed for every wheel style, so compare the S193H template with your wheel first.
Key features
- 4-piston S4 floating caliper in a silver finish
- 13.0-inch vented, one-piece slotted rotor with zinc-plated surface
- Hard anodized aluminum pistons with stainless steel abutments
- Noise suppression clips included
- Dual dust, weather and pressure seals
- Powder coated finish
- Rotors pre-assembled with NAS high grade stainless hardware
- Uses the DR1-C brake pad type
Before you buy
Rear disc brakes do most of their work when the vehicle is loaded or heading down a long grade, so the pad and rotor pairing matters as much as the caliper. A rear upgrade should be planned alongside the front brakes, because a stronger rear setup can shift braking balance on a vehicle that already has larger front components. Think about how the Jeep is used most: daily driving, towing, or trail runs with long descents each call for a different pad compound.
Before ordering, measure the space behind your current wheels and compare it with the template and the minimum wheel diameter. Rear brake work also involves the parking brake mechanism and brake lines, so inspect those parts while the wheel is off and replace worn hardware rather than reusing it.
- Check rotor and caliper clearance against your wheel
- Inspect rear hoses for cracking or swelling before installation
- Look over parking brake parts while the rear is apart
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4402007S-2 |
| UPC | 90127995594 |
| Caliper | S4, 4-piston, floating |
| Caliper color | Silver |
| 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 factory rear end.
Earlier Wrangler generations such as the TJ and LJ, and the Grand Cherokee, are not covered by this fitment. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The kit re-uses the factory parking brake, so no separate parking brake parts are included. Brake hoses are not included, so check that your existing rear hoses are suitable before you start. Measure wheel clearance against the 17.0-inch minimum wheel diameter using the S193H template. Rear disc brake work involves hydraulic components, so have it done by someone experienced with disc brake service.
What’s included
The kit includes the S4 caliper assembly, the pre-assembled 13.0-inch rotor, and all mounting brackets and hardware with NAS high grade stainless fasteners.
Not included: brake hoses. Check the package contents against your installation before starting.
