I've got myself a 2009 Reign X frame and now I'm looking for different crankset options. May be I will go with Truvativ Hozefeller ISIS cranks.
In this case, what spindle length BB will I need?

I've searched the internet, but some people say 113, others say 118.
Most probably I will run a 1x9 setup with a E13 guide in front. But I can decide to use 2x9 later as well.