I work with tire all day and I have had bot I had kms on my Cherokee now I have km2s on my r50 and honestly other than the fact the km2s have a softer tire shell and carcass which Is why there quieter on the street but don't let the lack of sound fool you there atleast one and a half time better off road traction and even with out bead locks, at 10 psi there grip is outstanding. As stated the kms are being phased out cause after 10,000+ k miles they chop to the point where it's better to throw them away than ride on them (personally experienced) so they took Baja t/a tread tech and mixed it with km tech to come up with a super soft km2 tire which I think is well worth 200+ for a 33 inch tire