joshuabardwell
Elite Member
I don't know what your truck is rated for re: max goose neck trailer weight. But if your combined truck and trailer weight is over 26,000 you would need a CDL A. I suspect your truck weighs at least 6500-7000 plus the 21,000 on the trailer plus the trailer weight itself puts you well above 26K.
I don't think the CDL is necessary unless you're towing commercial. For private towing, as long as you're under the GCWR you should be fine.