Originally Posted by
lagers
verktyg Good to know, thanks for the reply!
I'm still trying to figure out spindle length I need to get.
I'm still trying to wrap my head around this. If I understand correctly, for my FC-1050 crank (spec'd at 68x113 or 70x115), I'll need to order a 68x113 bottom bracket, instead of a 68x115 (or 116 since 115 is not available on eBay), due to the spindle being offset 1mm to the right?
For consideration of a well-centered chainline between the crankset and freewheel, yes the bb spindle should be 2mm shorter than spec'd for the particular crank.
On a small number of frames, the left arm might possibly interfere with the left chainstay, but I've had that problem just once out of over 100 builds where I was trying for the shortest chainline (for the usual reasons of reduced chain angle and lowest Q-factor).
The chainline issue would be less of a consideration for a rider who prefers to use primarily the small chainring, riding at in-town speeds.