Originally Posted by
Ex Pres
And if you think you can run a shorter BB because you're not using the inner ring - be careful. I've done this and you may run into interference with the chainstay - not just the inner ring landings, which I've filed off, but the chainring bolts themselves. Remember, you'll be flexing the crank when riding. It may not hit on the stand.
You can definitely run a shorter spindle because you're not using the inner ring (at least on these frames), the question is how much shorter. I considered the factors you mention. I won't be filing any part of these cranks. I needed to place the order today, so I just ordered both in 107mm. You've got to start somewhere and I can use a spacer or two if needed. The problem with spindle length questions is that the best answer is try different lengths until you get what you're after.