So here's the question. Without pulling a wheel and taking a look for myself, has anyone already verified if the 2017 x23b with goodyear tires has self adjusting brakes or not? The Jay feather brochure for the 2018's clearly states that all Jay feather trailers with goodyear tires come with self adjusting brakes. It is not mentioned in the brochure for the 2017 models with goodyear tires.
Crawl under your TT and take a picture of the axle tag. Its either a Lippert or Dexter axle, with the model info on the tag go to the company web site and look up that axle, it will list all the specs. Or you can place a call to either company and they will tell you.