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Old 04-19-06, 07:36 AM   #1
zoopants
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bb size for an LHT

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.

Thanks for any help.
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Old 04-19-06, 01:02 PM   #2
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You might wanna visit your local bike shop (lbs).

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.
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Old 04-19-06, 01:11 PM   #3
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Geez the frickin nashbar ad text practically tells you what size to use.

How about doing a little research before posting next time.

BTW i have one of those inexpensive nashbar isis bb and it works pretty good. If you go the diy route youre gonna need a bb tool AND a crank puller (unless the crank has self extracting bolts).
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Old 04-20-06, 12:52 AM   #4
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you need the 68x113mm. again i'd go with the nashbar isis bb. its a th industries/fsa bb. Use coupon code TKM7 for 10% off.
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