Overview
The 55066-020 is a rear Claw performance brake rotor set, sold as a pair, for selected 1999-2005 Chevrolet and GMC models. It is built to the factory rear rotor size of 12.795 inch diameter and .787 inch thickness.
Each rotor has a drum-in-hat design, so the hat section carries a drum surface for the parking brake. The cast iron body is cross-drilled and slotted, with open slots and holes that move gases and dust away from the friction zone. The rotor has a zinc-plated finish and a rust resistant coating.
Key features
- Drum-in-hat design that combines the rotor with a parking brake drum surface.
- The rotor uses a floating design.
- Cross-drilled and slotted friction surface for gas and dust relief.
- Rust resistant coating and zinc-plated finish for corrosion protection.
- Chamfered holes that Baer describes as a way to cut down on stress cracking.
Parking brake considerations
A drum-in-hat rotor ties the parking brake to the rotor itself, so the parking brake shoes, adjuster and drum surface wear alongside the service brake. When the rotors are replaced, inspect the shoes and hardware on the same axle, since worn shoes can rub the hat surface and reduce parking brake hold.
Rear rotors on a truck or SUV carry a large share of braking under load, so the cross-drilled and slotted face helps clear debris but still needs periodic checks. Look for cracks near the holes, scoring from worn pads and any pulsation under light braking. Keep the parking brake adjusted and test it on a slope in a safe area after installation.
- Inspect parking brake shoes when rotors are changed
- Check that the parking brake adjusts fully before driving
- Look for scoring on the hat surface from worn pads
- Clean the hub and rotor mating surfaces before mounting
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 55066-020 |
| UPC | 844165000372 |
| Quantity | Set (a pair) |
| Axle | Rear |
| Rotor construction | 1-piece, full cast |
| Material | Cast iron |
| Rotor type | Drum-in-hat |
| Outside diameter | 12.795 inch |
| Nominal thickness | 0.787 inch |
| Discard thickness | 0.728 |
| Center hole diameter | 3.098 |
| Mounting bolt hole circle diameter | 5.5 |
| Mounting bolt hole diameter | 0.645 |
| Mounting bolt hole quantity | 6 |
| Stud/lug hole quantity | 6 |
| Overall height | 3.358 |
| Floating | Yes |
| Solid or vented | Vented |
| Surface type | Slotted and drilled |
| Disc finish | Zinc plated |
| Rust resistant coating | Yes |
| Grade type | Premium |
| Emission code | 6 |
| ABS tone ring included | No |
| Country of origin | CN |
Vehicle fitment
The manufacturer fitment list covers rear rotors for the 2003-2005 Chevrolet Astro, 2002 Chevrolet Avalanche 1500, 1999-2000 Chevrolet Silverado 1500, 2000-2002 Chevrolet Tahoe, 2005 GMC Safari, 1999-2000 GMC Sierra 1500 and 2000-2002 GMC Yukon Denali.
Cadillac applications, 2007 models and hybrid variants are not covered for this rotor. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Drum-in-hat rotors combine the disc with a parking brake drum, so the parking brake hardware on the vehicle must match this design. Rear brake work affects braking balance, so have a qualified technician mount and test the pair.
What’s included
A pair of rear rotors, sold as a set. The floating design is included, and the ABS tone ring is not included.
Not included: Brake pads and parking brake shoes are not part of the set.
