Adjusting Chainline with BB30 FSA Crankset

[Valbrona]

The chain rubs on the inside of the big chainring when on the smallest three sprockets (OLD 135mm). I have two 2.5mm spacers I can fit - one on the DS and one on the NDS - however, if I fit these it looks as if the bearings will no longer fully locate on the machined areas of the spindle where they are supposed to locate.

Any comments?

Thanks.

[Rick]

BB shell width ?
Frame brand/model ?
Chainstay length ?
Check alignment of rear triangle for centering ?
Check derailleur alignment (it could be "working" but the lower cage angled outward, causing chainring rub)

I had that problem with Wickwercks compact chainrings, but they are known to have unusually thick ramps.

When I checked and adjusted my derailleur hanger, I carefully tweaked it so that it was "within spec" but tilted slightly inward and twisted so it is "looking at" the little chainring. I can remember if the spec was like within 1 or 2mm, but I cheated in the direction i wanted the derailleur to look because I know that I like to cross-chain. Big-Big is usually no problem, but little-little can create rub unless you are very precise about alignment. .