Start here and then choose your questions accordingly. No answers on dimentional differences (but its real close), it really depends on your wheel selection for fitment, but an 18" wheel is where you are going to start.
https://lateral-g.net/forums/showthread.php4?t=6953
https://lateral-g.net/forums/showthread.php4?t=6736
http://www.pro-touring.com/forum/showthread.php?t=20172