My experience with truck widths and grinds…
I rode the DLX 8.25/14.38 with 144s as my main set-up for well over 10-years (149s prior to 144s coming out). During that time I occasionally put 149s (again) on my 8.25, rode a few 8.5 decks (with 149s), and had the DLX 8.75/14.62 with 159s as more of a cruiser type deck.
For a very long time, whenever I went above 144s, I really hated the “lateral slop” (e.g. lateral movement) of/on wider trucks. Once I got into a grind, I didn’t want to deal with side-to-side movement—I wanted a solid lock, and I got this more quickly with smaller trucks. Moreover, anytime something was cross-locked, wider trucks put the board at more of an off-angle from the direction of travel, whereas narrower trucks keep the board more parallel (with the direction of travel), and I felt less “twisted-up” on smaller trucks.
Over time, and with age, I started riding wider boards a bit more. It took me a bit to adjust to the “lateral slop,” but I also realized, at least for me, wider trucks had some real grind advantages, too. Specifically, I didn’t have to be as precise. Take something like a b/s 180 to fakie 50/50 grind on a curb/ledge/etc. With narrow trucks, that trick is easier to “over rotate” if your body is still turning a bit after the trucks lock-in. For me at least, wider trucks will “absorb” a bit more of that rotation, and be less likely to toss you off if you are not perfect (and I am certainly not). The other thing is that once in a grind, wider trucks just feel more stable. As of now, my main set-up is the BLKLBL 8.75/14.5 with 159s. When I get back on my 8.25, it now feels like I am on a “tight rope,” and even olleing into a b/s 50-50 on a bench feels a bit precarious (because of how “7.75” the 8.25 now feels). My 8.75 feels much more…balanced.
Not grind related, but another place I really like wider trucks is on axle/feeble/pivot to fakies on transition. I do those tricks, and variations of them, A LOT. A wider truck puts that rear toe-side wheel further “in” the ramp, and for me, that makes those tricks a lot more fluid and easier to bring back in.
Flip tricks? Yeah. Those take more effort with wider trucks, for sure. But man, do they ever feel good on a bigger board, too.