Overview
The Big Claw HD rear disc brake rotor kit, part number 2302083-2, is an oversized rear rotor set for single rear wheel trucks in 2WD and 4WD configurations. It suits the 2020–2025 Chevrolet Silverado 2500 HD and 3500 HD and GMC Sierra 2500 HD and 3500 HD.
The rotors are purpose cast with directional cooling vanes and can be up to 2 inches larger than stock on some applications. Two new caliper relocation brackets move the calipers outward to clear the larger diameter while OE pads and hardware still fit. Testing by an independent third party measured a braking effectiveness gain of up to 49 percent, and rotor temperatures as much as 200 degrees lower than OE in extreme conditions.
Key features
- Oversized rear rotors that increase brake torque and leverage.
- Purpose-cast one-piece directional vane design with curved vents
- Slotted friction surface that Baer says helps vent dust and gases
- Zinc-plated finish with rust-resistant coating
- Caliper relocation brackets reposition the calipers for the larger rotors
- Floating, drum-in-hat rear rotor type
- Designed to keep OE pad and hardware compatibility
Choosing the right rear setup
Heavy trucks put more load on the rear brakes when towing or carrying a loaded bed, so rear rotor condition matters more than many owners expect. An oversized rotor adds leverage, but it also changes how heat moves through the assembly. Good pad contact and a free-sliding caliper keep braking even from one side to the other.
Rear hubs, wheel bearings and studs are easy to overlook during a rotor swap. Inspect them while the rotors are off, because a worn bearing or bent stud can cause runout and vibration once the new rotors are in place. Clean the hub face so the rotor sits flat and seats against the hub without gaps.
- Check the hub face for rust or debris before mounting
- Inspect caliper slide pins and boots
- Torque the wheel fasteners after the first few stops
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 2302083-2 |
| UPC | 90127969991 |
| Axle | Rear |
| Drive | 2WD, 4WD |
| Rotor construction | One piece, full cast |
| Rotor type | Vented, drum-in-hat, floating |
| Brake surface | Directional |
| Vent design | Curved |
| Surface type | Slotted |
| Finish | Zinc plated, rust-resistant coating |
| Material | Cast iron |
| Grade type | Performance |
| Template | Z295U |
| Center hole diameter (in) | 5.006 |
| Inside diameter (in) | 8.939 |
| Outside diameter (in) | 15 |
| Overall height (in) | 4.685 |
| Nominal thickness (in) | 1.339 |
| Discard thickness (in) | 1.26 |
| Mounting bolt hole circle diameter (in) | 7.086 |
| Mounting bolt hole diameter (in) | 0.641 |
| Mounting bolt holes | 8 |
| ABS tone ring included | No |
| Emission code | 6 |
| Country of origin | USA |
| Sold as | Set |
| Warranty | Limited 1 Year |
Vehicle fitment
Covered models are the 2020–2025 Chevrolet Silverado 2500 HD and 3500 HD and GMC Sierra 2500 HD and 3500 HD. Wheel fit varies by wheel style, so check the Z295U template against your wheels.
Models outside the 2500 HD and 3500 HD line, and model years outside 2020–2025, are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The swap is a direct bolt-on and needs no brake bleeding. Before fitting, measure the Z295U template against the wheel you plan to run, including the spare, since clearance changes from one wheel style to another.
What’s included
The kit includes a pair of Big Claw HD rear rotors and a pair of new caliper relocation brackets that move the calipers outward for the larger rotors.
