We’ve measured the Gullwing 10″ Mission I up, and we seem to get a real-world hanger measurement of 186mm, an axle of 9.95″, and a height to the center of the axle of about 58mm with the stock bushings, with a weight (including all supplied nuts and washers) of 410g per truck. These are incredibly tall trucks – definitely one of the tallest currently available in this size.
The bottom bushing is a 14mm tall barrel, and the top one is a 9.5mm tall cone. The provided bushings measure 85a on our durometer. Due to the fact the baseplate has a built-in bushing seat for barrels, we recommend sticking with a barrel and cone setup if you’re looking to put aftermarket bushings in these trucks. That’ll give you the best possible rebound and stability – you should be actively pushed out of a carve if you’ve got it set up right.
The baseplate is double-drilled, having both the new school (shorter) hole pattern and the original 80s style holes, meaning these will fit on any board in existence, whether it’s a modern shaped deck or a classic reissue.
Finally, the pre-installed kingpins are of the modern splined variety, but there is enough room in the baseplate to install an inverted or regular hex-head kingpin. There’s a flat surface next to the base of the kingpin, almost like it was designed to hold a hex head, but we can’t guarantee that it will hold a hex head still. However, you probably won’t need to swap the kingpin out – there’s so much kingpin clearance that the chance of hanging up on a smith grind is slim to none. Slash away!