Overview
The Baer Brakes 6919186 is a 1-piece left-side vented replacement brake rotor, 12.000 inch in outside diameter and 1.020 inch thick, with a slotted, drilled and zinc-plated surface and a modified drum lip for early big bearing systems.
The rotor is machined specifically for big bearing systems, so the drum lip is the first thing to match in a brake rebuild. It comes with two bolt circles, 4.50 inch and 4.75 inch, each with 5 lugs, and a 2.78 inch center hole (2.780 inch register). Its overall height is 2.406 inch. The castings are purpose built and dynamic balanced for smooth running.
Key features
- Modified drum lip machined for early big bearing systems
- Vented rotor design with a 1.020 inch nominal thickness
- Slotted, drilled and zinc-plated surface finish
- Curved vane design that Baer Brakes describes as optimum for cooling
- Dynamic balanced for vibration-free performance
- Full cast, one-piece cast iron construction with a directional brake surface
Matching a big bearing rotor
Brake rotors work with the pads and caliper to convert wheel rotation into friction, and the rotor surface is where heat builds up during every stop. On a big bearing hub, the rotor, drum lip, bearings and hub must agree before the brakes are assembled. A mismatch can leave the rotor sitting off true, which shows up as pulsation under the pedal and uneven pad wear.
When replacing a rotor, check the hub face and bearing seat for rust, scoring and warping before fitting the new part. Clean the mounting surface so the rotor sits flat against the hub, and tighten the lug fasteners in a star pattern. Slotted and drilled surfaces help shed gas and water, but they can also wear pad material faster, so use a proper bedding procedure for the pads.
- Measure the hub bolt circle before ordering
- Inspect bearings and seals during the rebuild
- Replace the rotor when pulsation or thickness loss appears
- Confirm the drum lip matches your bearing setup
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 6919186 |
| UPC | 844165054511 |
| Axle position | Left |
| Outside diameter | 12.000 inch |
| Nominal thickness | 1.020 inch |
| Overall height | 2.406 inch |
| Center hole diameter | 2.78 inch (register 2.780 inch) |
| Stud/lug hole quantity | 5 |
| Stud/lug hole circle diameter | 4.50 inch and 4.75 inch |
| Material | Cast iron |
| Construction | Full cast, one piece |
| Surface type | Slotted, drilled and zinc plated |
| Rotor type | Vented |
| Brake surface | Directional |
| Drum in hat | Yes |
| ABS tone ring included | No |
| Grade type | Performance |
| Emission code | 6 |
| Machining note | Machined specific for big bearing systems |
| Country of origin | USA |
Vehicle fitment
This rotor is made for early big bearing systems and select Baer Brakes systems. Match the bearing setup and bolt circle to your hub before choosing it. Confirm fit for your vehicle’s year, model and trim before ordering.
Do not assume this rotor suits a standard hub or a bolt circle outside 4.50 and 4.75 inch. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Measure your hub’s bolt circle and compare it with both the 4.50 inch and 4.75 inch figures, since the rotor is made with both. The modified drum lip is machined for the big bearing configuration, not standard hubs. Brake work affects stopping power, so have a professional complete the install.
What’s included
Includes one left-side vented rotor.
Not included: The ABS tone ring is not included. The bearings, hub, caliper and pads are separate parts and are not part of this rotor.
