Is the crankset new? If so, it comes with the bearings you would need. Possibly the circlips as well.
If not, you just need some bb30 bearings and the circlips. From memory (though it may be flawed memory) the older OSBB is basically "true" bb30.

i personally dont see how bb91 cups could have been used. those press into a different type of frame (like Giant frames, not bb30) and ive never seen an adapter for bb30-to-bb86/90/91/etc.
i believe you likely have specialized's own 24mm adapters. they look like wheelsmfg ones but aluminum:

if that's the case, your bearings and circlips are already in there. may need some bearing dust shields and wavy washer.

I have a photo that does show "Shimano SM-BB91-42A" on the cups currently, I just don't know how to post photos here.

shrink your photo to 160kb or less, put it somewhere obvious on your computer (like the desktop), then under the UPLOAD ATTACHMENT area, look it up by clicking BROWSE.
i just have to see this picture.

shrink your photo to 160kb or less, put it somewhere obvious on your computer (like the desktop), then under the UPLOAD ATTACHMENT area, look it up by clicking BROWSE.
i just have to see this picture.

If you buy a bb30 bearing kit, it should come with the clips, wave washer, bearing shields, and some extra spacers.

(http://www.competitivecyclist.com/produ ... n=Datafeed" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;)

Or you can buy the ciclips online for less than 10 bucks shipped in a pinch.

(http://www.google.com/products/catalog? ... CGkQ8wIwAQ" onclick="window.open(this.href);return false;)

What you need really is going to depend on what the crank has hanging off of it. Sometimes the bearings and washers are all included, sometimes not. Rarely are the circlips included from what I've seen, since they almost always are left in the frame.

The safe play is to just buy the kit for ~$35, and follow the instructions. You can probably save a bit by just buying the bearings individually and the circlips, but IMO its not worth it if you aren't familiar with the technology - you might end up missing the wave washer or shields and spend more.