Hmm, ég efa einhvern veginn að flestir eigi auðvelt með að finna þetta þannig að hérna er info um poly bushes(á ensku að sjálfsögðu): SUPERFLEX BETTER BY DESIGN SuperFlex are not merely copies of the original rubber bushes. They are individually designed to take full advantage of the special characteristics of polyurethane - its durability, and exceptional friction-absorbing capability - not hitherto attainable with rubber. Critical crush, pre-load, and location factors are calculated to...