We changed from adjustable 7″ drum brakes to 10″ self-adjusting at about trailer #890. If you eyeball or measure the diameter of the drum brake inside the wheel, you will be able to determine which version you have. There is no performance advantage to having the self-adjusting brakes, and adjustment is typically included during an axle service which is recommended to be performed each season.

We don’t offer the brake switch; theoretically we would need to swap only the brake mechanism and hubs which are close to $1600 for the pair and would likely require 4+ hours of labor. It would be more straight forward and perhaps cheaper to swap to the new axle which would run over $2500. Additionally, we changed from a 12″ to 13″ spare tire to clear the larger brake drum and also needed to change the frame to accommodate the larger diameter spare tire. You would also need a new spare, and it would no longer fit under the tongue of the trailer.

The Dexter axle is pretty standard in the trailer/RV industry, so it may be possible that other trailer or RV shops may offer this, but it would come with drawbacks.