I have a 2011 sirrus with ton's of miles on it. Chain and rear cassette have to be replaced at this point.
factory gearing is
48 x 38 x 28T front
11,13,15,18,21,24,28,32 rear cogs
What 8 speed cassette should I use for closer gearing with last gear being a tall one 32 or 34 a little more...