ISIS BB Sizing - Trek 1.5

ExeterSimon

Hello

Can anybody help me with the sizings of ISIS BBs?

I have a Trek 1.5 2009 model and despite the tapered BB and FSA Vero cranks I'm more than happy.

So I tootled off to Chain Reaction and bought the FSA SLK Carbon Chainset:

http://www.chainreactioncycles.com/Mode ... elID=41436

Now I need to find a decent ISIS BB...but road BBs don't seem to be as straight forward as MTB BBs.

Does anyone know what size BB I need?

Cheers!