Im ordering up parts for my new cherry LHT and Im a bit stuck on the BB size.
I understand that the sizes effect chainline and was wondering what the ideal size would be.
Im going to be running the 170mm Nashbar trekking crank 28/38/48.
You'll probably need them to a. install headset, b. install bb and cranks. Unless you wanna buy the tools to do it yourself. Which cost as much as 3-4 visits to the LBS.
I dont know your mechanical expertise level, who may know it all already and just need the bb tip. But i thought somebody ought to advise visiting the LBS. Seems like everyone assumes folks have all the tools and plenty bike building experience. I doubt this is true in most cases. Better to pay someone 20 bucks and make a friend than diy and booger up a frame or pricey component, then STILL have to visit the LBS.
Your frame has either a 68mm or 73mm shell (see surly specs) and needs a spindle somewhere between 108-118mm depending on crank. If its a sq taper you probably need ~113 ish. If isis still probably 113. Isis only come in 108 113 and 118 (i think). Sq taper come in 107 110 113 etc, more choices.