Colby,
Firstly the antenna thing, it will still work fine, but range may be affected.
Secondly, re the hex size on those wheels, the chances of anyone in here (CEN forum) knowing that for certain is fairly slim, but its information thats easily attainable using GOOGLE (or similar) so instead of other people doing the work for you, give it a go yourself, I came up with the answer in approx 30 seconds by typing into GOOGLE "ofna pirate 2.2", try it dude enlighten yourself!!...
(cause I aint tellin ya!
)