Victork
i didn't read the entire thread so some of this may have been pointed out.
If using a standard width frame your +2s with 4:1s will work well on today's tracks.
Not sure if you saw or not, but Rpm is making a limited run of their discontinued XC width axle. This would put you at the width you need on the rear.
The ideal setup is to be slightly narrower in the rear than the front for XC racing.
