Originally Posted by
uncrx2003
Question for those with a compact front rival and 10 ring cog. When you are in the small ring upfront, is it normal to have rub (cross chaining) when the it's in the two smallest cogs in the back?
That's the very definition of cross-chaining; with rare exception, any bike built in the last 40 years with multiple cogs and multiple chainrings shouldn't be shifted to the smallest cog on the small(est) chainring, or the largest cog on the large(st) chainring. Even if the chain isn't rubbing on the front derailleur plates, the chainline angle is hard on the driveline. With more recent bikes, with 7 to 10 speed cassettes, it's the largest (or smallest) two (and even sometimes three) cogs you should avoid. Those combinations typically overlap with other chainring/cog combinations anyway.