I know that there is at least one thread on the Diamondback Ascent, it however doesn't address my question(s). Several years ago I was given an "old" Diamondback Ascent (yellow frame & handlebars) by a friend who worked at a LBS. The previous owner had purchased it from a pawn shop and drove it to the shop to purchase a new bike.

A few years ago I'd replaced the cable, brake levers, shifters, chain and wheels. And then gave it to my now ex-girlfriend's daughter. Sadly she never rode it. And I added a pair of Specialized Flak Jacket Fatboys tires on it.

I'm not sure if the saddle is OEM or not (it's a back trails saddle), I'm pretty sure that the BB, front and rear derailleurs and headset are. After my Seek and Hardrock were stolen they returned the bike to me and I've been using it to get around the neighborhood. And would like to further upgrade/convert it to a commuter/touring bike.

To that end, what size BB does it have, what is the largest cog count cassette can I put on it. I suppose putting a pair of 700 rims on it is out of the question.

The only things I still need to add to it are fenders and racks/bags.