20x11x10's 9 paddle haulers great all around setup. Turning is not a issue nor is sliding, you dont lose near the power with haulers compared to gecko's and sandstars.
Ive ran gecko's, they turn great....thats about it, they are heavy and suck power right out of a bike, they dont hook-up for crap. So basically you will heat up your motor faster wich equates to more engine wear. More load agiasnt the engine and more tire spin.
Never ran sand stars on a trike.
AS far as 8" wheels, I see them all the time at the dunes. They hook-up better than a 10" wheel with 22" tires assuming both bikes are running 22" haulers. You get more side wall flex and conform to the sand better than a 10" wheel and 20 or 22" tire. Thats why you see the 80 horse banshees running a 8" wheel.
1986 310R
1975 F150 4x4
1975 F250 4x4
1968 F100 2wd
2001 Dodge 1500 4x4