Thread: Bicycle thread
View Single Post
Old 12-13-2012, 06:24 PM   #26569
pierce's Avatar
Joined: Jan 2003
Location: S'Cruz
Oddometer: 10,116
Originally Posted by Gummee! View Post
which crankset is on there now again? model. I've got a buddy that works for a shop and can probably look up the crank/bb on J&B's website and tell you definitively.

the new crank is an Origin-8 Trekking crankset, this one

and I can find /nothing/ technical on their webpile, nor was their anything in the box.

the crank I removed was a Shimano FC-M191,

which that says had a 47.5mm chain line (I didn't measure it before removing, DUH!), and uses a 122.5mm BB (wow, thats wide).

I measure my current chainline at 54mm, so...

54 - 47.5 == 6.5mm
122.5 - (6.5*2) == 109.5mm

so I figure I need a 110mm BB.

but yeah, if your friend can verify this, awesome. I have the bike ridable as-is with the funky chain line, just that the front derailleur is cranked out as far as it goes.
Experience is what you get when you don't get what you want.
pierce is offline   Reply With Quote