Replacement Bearing Kit Recommendations for a 1972 Airstream Overlander
Updated 04/16/2025 | Published 10/30/2017
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Question:
I am purchasing the 12 brakes AKEBRK-7-SA Can you please advise which bearing kit should be used? I am installing the brakes on a 72 Airstream Overlander
asked by: Marc H
Expert Reply:
If you have standard size axles that you are installing the Electric Trailer Brake Kit # AKEBRK-7-SA on then you can choose from the following options:
5,200 lb Axle - Kit # BK3-310 (Grease Seal 2.125" ID) or Kit # BK3-300 (Grease Seal 2.250" ID)
6,000 lb Axle - Kit # BK3-110 (Grease Seal 2.125" ID) or Kit # BK3-100 (Grease Seal 2.250" ID)
7,200 lb Axle - Kit # BK3-210 (Grease Seal 2.125" ID) or Kit # BK3-200 (Grease Seal 2.250" ID)
Since you do have an older Airstream Overlander you may want to check the B, C, and D locations (see picture) of your spindle to ensure that these are correct. You can do this by using a digital caliper.
The inner bearing has an ID of 1.750", the outer bearing has an ID of 1.250", and the grease seal IDs are shown with the above part numbers.
These kits and brakes will work great with a hub and drum assembly like part # 8-219-4UC3.
Product Page this Question was Asked From
etrailer Electric Trailer Brakes - Self-Adjusting - 12" - Left/Right Hand - 5.2K to 7K
- Trailer Brakes
- Electric Drum Brakes
- Standard Grade
- Self Adjust
- 12 x 2 Inch Drum
- 5200 lbs Axle
- 6000 lbs Axle
- 7000 lbs Axle
- 14-1/2 Inch Wheel
- 15 Inch Wheel
- 16 Inch Wheel
- etrailer
more information >
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Michael
4/16/2025
what is difference between bk3-300 and bk3-100 dont they have the same size bearing and seals?