Hey all! I finally got my crank and bottom bracket tools. I removed the cranks and bottom bracket. The bottom bracket is a 68X124.5 and the cranks are 170mm. Basically what I need to know is how do I order replacements? What would I need to do to upgrade this stuff to isis or octalink? I've been reading stuff all over the net, but I still don't think I really understand the full procedure. I want to thow on some Shimano Deore cranks, but I don't know what BB to get. I looked at this chart http://bike.shimano.com/publish/cont...inline.pdf.pdf But it didn't help much. Any and all help is MUCH appreciated.