Choosing trucks for a shaped deck isn’t as simple as with a “normal” straight-sided popsicle. The widest point of this Mark Nicholson Beer Helmet deck from Death Skateboards is 9″, but it narrows to 8.75″ at the front truck and just 8.25″ at the back.
Our recommended way to set this up would be to choose your trucks to fit the front of the deck by using something like the 8.75″ axle of Film’s 6.0″ trucks and simply deal with the fact the back wheels are slightly exposed. However, you could split the difference with something a bit smaller like the 8.45″ axle of the Ace AF1 55s if all that overhanging axle really bothers you.
We don’t recommend you go as low as an 8.25″ axle to keep the back wheels covered, though – that’ll leave the front of the board feeling very weird!