I'll soon be starting my first build. The frame I've bought comes with a 68 x 110mm bottom bracket. I would like to use this crank: xd500 tripple which says, "We recommend a 113mm bottom bracket for this crank if used on a road bike, but bikes made for wide tires, such as loaded touring bikes or mountain bikes, might need a 115mm BB."
So... which do I need: 113mm or 115mm? I'm thinking 115. Frame is the Thorn Sherpa and I'll be running a 9 speed 11-34 cassette and 26x1.5 tires. My riding will be a combination of daily commute, long weekend rides, camping several times a year, and eventually (if all goes as planned) a few 1-2 week tours.
If anyone cares to throw in a recommendation for front and rear derailleur I'm very open to suggestions. Currently I am planning to go for 105 fd and xt shadow long rd but some friends tell me to go for a mountain fd instead of the 105.