Originally Posted by Jason Curtiss
...The chain rubs against the side of the large sprocket when aligned with the smallest rear cog and the small front sprocket...Jason
Jason, when you're on the small ring in front, keep the chain on one of the 3 largest cogs in the rear, and when on the big ring in front, keep the chain in one of the 3 smallest in the rear. While your frame may or not be well aligned, that should solve your problem...