I am about to have a b.b. and crank put on my Surly Cross Check, and have found a crank I like which is the Stronglight Ironlight http://xxcycle.com/ironlight-titane,,en.php , but need to know what specs I need to adhere to while selecting a b.b. Particularly, I need to know what this crank's interface is; ISIS, square taper, etc. Regarding threading, I think the Ironlight uses British.
Spindle length is also a question for me. One b.b. I saw has a selection of either 108, 113mm or 118mm.
The Cross Check's b.b. specs are: 68mm wide, standard English threaded 1.37" x 24t
Right now, I'm looking at the Hope Stainless Steel for a b.b.

Paul