A few years ago I bought a Raleigh MTB and immediately replaced the cranks/BB. I have the old cranks and BB, but I'm not sure if I'm missing a piece. Having never replaced a BB myself, I have studied this forum but cannot determine if what I have is complete.

http://aebike.com/page.cfm?action=de...=30&SKU=CR2557

This is exactly what I have, but it seems that once I get it threaded into the shell, the opposite side (left) would need a cup to thread in to secure it. This product (above) and my unused BB do not seem to have this. I have an old Truvativ Powerspline that does have the cup, but I don't want to use that crankset.

Am I missing something?