Originally Posted by
atlantic90
huh? Not sure what you mean.
Square taper BB's have done a great job for decades. Many of these so called "upgrades" are more problematic than what you currently have.
Which model Rockhopper do you have? There are 4 versions listed here-
BikePedia
Your current ring & cogs require a RDER with a 45T chain wrap capacity. Without knowing what RDER you have (why I ask which model and assuming it's the original RDER) I am VERY suspect your RDER has more than 43T if that.
Sizing a chain to safely fit on Big:Big is probably going to result in noticeable chain sag when on Low:Low.
Did you change the shifters when you put on your 10 speed cassette? 8 speed shifters AREN'T going to work with a 10 speed cassette.
EDIT- Is this your RDER?
http://www.disraeligears.co.uk/Site/...39_SGS%29.html
IF it is, you only have a 38T chain wrap capacity.