Can I acheive a 54mm chainline with a external bearing BB crankset?

on a 68mm bb shell, my Hone can achieve 55mm chainline if you put a 2.5mm spacer on the driveside shell. and that if you run the chainring outside the spider.

i have a 73mm bb shell...

I assume i'd run the SS ring in the "big-ring" position...

would it work?

https://flic.kr/p/3430138985
Check the description on the photo. I got 55mm with a King external bearing BB, Surly Mr. Whirly cranks, ring on the inside of a SS-appropriate spider. Rear was 54.5mm.

https://flic.kr/p/3430130469
Morgan

Wow Morgan, that's some serious Gold...

Didn't know Stan could/would custom anno.. nor Surly..??

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But, ok, good to know, I CAN acheive it, if I need to...my Rohloff requires the 54, so that's a serious factor. I'll try methods from other thread, re: slipping crank bolts to try to salvage my Phil Wood/WI setup, which I am otherwise quite happy with.

ncj01 said:

Wow Morgan, that's some serious Gold...

Didn't know Stan could/would custom anno.. nor Surly..??

Click to expand...

I had a local anodizer strip and anodize a bunch of that stuff gold.

Sounds like you can get the right chainline with an external bb. Good luck!

Morgan