I am getting confused. (nothing new). I have been getting quotes on new rushmore and have had a few quotes offer neverlube axles 12.25 x 3.75. Are these heavier axles than standard?? I asked one dealer and was told they were no longer available, but another said could still get them. I guess my question is --are they heavier than the 7000 pound standard axles and do they have bigger/larger brakes??