bfromcolo

I am looking at buying a 11 - 32 8 speed cassette and a MTB rear derailleur for my road bike. SRAM has three models 820, 830 and 850. I was wondering what your opinions are on the 830 versus the 850, it looks like the 850 is a little lighter, does this come at the expense of strength or longevity? They are both pretty cheap so the price difference doesn't really matter.

Thanks