"Double Darkside" is usually running a REAR motorcycle tire on the front of the rig backwards, where as rear tire compound is geared for milage while applying power. I'm currently running this tire in reverse rotation.
https://a.co/d/gZR9PON
As for the original question from Don, I don't see how you could mount a 150 on the narrower 18" Stratoliner wheel vs the stock Venture 16" wheel.