Overview
The Baer Brakes Pro Plus rear brake kit in Red, part number 4402001R, uses a two-piece rotor and a 6-piston 6P caliper on the rear axle of Jeep Wrangler JK, Wrangler JL and Gladiator JT vehicles fitted with the factory rear end. The red caliper pairs with a 14.36 inch slotted, drilled and zinc-plated rotor.
Staggered pistons are designed to minimize uneven pad wear, and the pads are the D0731 type. Each rotor ships pre-assembled with NAS high grade stainless hardware, and the brackets and hardware are included. The kit is designed to fit most wheels 18 inch or larger, but wheel style clearance should be checked against the Q145P template before mounting.
Key features
- Two-piece 6-piston 6P caliper built in Phoenix, Az
- Staggered pistons to minimize uneven pad wear
- Stainless steel pistons, abutments and noise suppression clips
- CNC machined from US-sourced forged or billet aluminum
- Powder coated Red caliper finish
- Dual seals for dust, weather and pressure
- Two-piece slotted, drilled and zinc-plated rotor with a billet aluminum hat
- Pre-assembled rotors with NAS high grade stainless hardware
Choosing a rear brake setup
Rear brake upgrades affect more than stopping power. The rear caliper, rotor and pads work with the parking brake and the rear axle, so a change at the back should be matched with a check of the front brakes and the hydraulic system. Owners who run larger tires or carry heavier loads should confirm that the wheel and tire combination clears the caliper and rotor through the full steering range.
Two-piece rotors allow the hat and rotor to be serviced separately, which can make future rotor changes simpler. Keep the red caliper clean of trail mud and road salt, and wipe the caliper body after wet runs to limit corrosion on the fasteners. Brake fluid should be replaced on a regular service schedule to keep the system responsive.
- Caliper and bracket bolts checked after the first drives
- Brake fluid condition on a regular service schedule
- Rotor surface checked for grooves or heat marks
- Parking brake function checked after the rear work
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4402001R |
| UPC | 844165051930 |
| Caliper | 6P, 6-piston, floating |
| Caliper color | Red |
| Caliper finish | Powder coated |
| Rotor outside diameter | 14.36 inch |
| Rotor type | 2-piece, slotted, drilled and zinc plated, vented |
| Rotor thickness | 1.1 |
| Minimum wheel diameter | 18.0 inch |
| Lug count | 5 Lug |
| Wheel bolt pattern | 5×5.00 in |
| Pad type | D0731 (FMSI) |
| Template | Q145P |
| Grade | Performance |
| 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.
Models outside those lists, including the Wrangler TJ and LJ, the Jeep Liberty and the Cherokee XJ, are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The pre-assembled two-piece rotors, brackets and stainless hardware mean the rear caliper and rotor assemblies are mounted as one package. Brake hoses come from another source, and the parking brake re-uses your existing OE hardware. Use the Q145P template to confirm clearance to an 18.0 inch minimum wheel. Brake work affects stopping performance, so a qualified technician should inspect the installation before driving.
What’s included
Sold as a kit: 6P calipers, pre-assembled two-piece rotors with billet aluminum hats, NAS high grade stainless hardware, and all mounting brackets and hardware.
Not included: Brake hoses.
