What you have to remember is that Taxxion shocks are a racing shocks. Front or rear Taxxion on 2017 and back need to be maintained I think they say every 16,000 miles. That may mean you take them off and apart and service the internals. My 13 had 35,000 miles and I was starting to think of replacing the rear shock spring. My 14 with 26,000 miles is still feeling ok.