rwthomas1
Site Supporter
They are quite a bit harder. The stock o-rings I removed didn't look bad at all, but I tried the polyurethane, just because. I don't think it really matters unless you in an extremely dusty or wet environment? Just change them at every tire change, clean our the old paste, apply some new, etc. No need to overthink it.Are these harder than oem, Or still pretty flexible?