Size 12 classic thrones wheel wells in soul plates custom liner strap on back of white trust liners I have in the wheels that came with these small rb switch frames but ive had in as large as 78mm and can go maybe 80 or up on them kizer grind rocks liner is also velcoroed to bottom of the shell i slid in some plastic between the velcro put in liners and pulled out the plastic so the liner arent going anywhere also baked the shells and widened them out cause my feet suck prob few more tweaks ill need to make im thinking about puttin on something what shadow does or what rb is doing on there new skates rivited in velcro strap on the cuff instead of plastic supportive but some give and more durable seems like alot of boot co's are going to that also thought about doing a white power strap for extra heel lock also eye lits and cuff bolts have been sanded down to there knickle finish so all hardware mathches blah prob more but thats all i feel like typing if u have any question u can im me on yahoo screen name is muhfuka