just picked up a 2015 174 with 700km on it . my question is i have the rear torsion springs on 5 and there seems to be a lot of sag or lack of rebound when you compress the rear end down it does not want to come back up much. that compared to my other 15 163 that it rebounds almost completely so to say? is that normal i tried looking for a post already related to this couldn't find. i see they sell heavy duty springs. was this a issue or is it just normal don't worry about it? thanks