What we have here is an assortment of White Industries bottom brackets that will fit a 30mm spindle. Use with their MR30 cranks for best results. Pick yer' poison: BSA for your endless and timeless threaded frame, T47 for the burgeoning new threaded standard or PF30 with thread-together shells to cut the creak on you press fit shred sled. Each are the standard stainless steel bearing versions. Also, see the White Industries 30mm Bottom Bracket Spacer Kit for proper fitment.