's Forum Archives - Fixed Gear

Archive Home >> Fixed Gear

Newb question....(4 posts)

Newb question....Mike Prince
Jan 25, 2004 1:43 PM
Building up my first ss/fixed gear this winter. So far have a lot of components and a frame (Trek 610 from '84 or so, Reynolds 531, horiz dropouts and fender eyelets). I'm planning out a series of purchases and need help with bottom bracket length.

Planning on:

Shimano 105 (80's) square-taper 165mm double crank, 42t - already have
Surly flip/flop hub respaced to 126mm - on the list to buy
15t freewheel, 16t fixed cog

Other goodies - Dura Ace quill stem, Shimano 600 long reach sidepulls and aero levers. Trying to find an NOS 80's seatpost as well to complete the 80's theme.

So my question is what length bottom bracket spindle should I be aiming for? I need to get a new bb, but have no idea what length(s) will give an acceptable chainline. The old one was 116 mm which seems like it will be too long. Since I'm buying a new bb anyway, I wanted to get one that allows me to mount the chainring on the outside of the spider.

I was thinking 107mm, mostly since that size seems to come up a lot on Sheldon Brown's website. Also, without a back wheel yet I can't try one out and eyeball it.

re: Newb question....PaulNYC
Jan 25, 2004 3:48 PM
Sheldon has a great chart. But I recommend getting the rear wheel first and then going to the bike shop and trying to find the best BB. I set mine up so I could use the chainring on the outer position.

Good Luck.
You may want to give somemsmootsiemartin
Jan 26, 2004 8:16 AM
consideration to going with a 15/fixed and 16/free instead of the 15/free and 16/fixed.

good luck,
re: Newb question....ukiahb
Jan 26, 2004 8:46 PM
It might be worth considering a Phil Wood BB too, as they can be adjusted about 5mm, would make geting the chainline perfect easier.