We searched for it we found it fusion 5 is born during 2 years hutchinson teams have been working on a unique process allowing the hdf5 to reach high level results on the 5 performance highlights of a tire grip efficiency durability puncture resistant comfort its the union of all hutchinson group intelligences regarding research development and experience in the composition of the best cycling compoundsit is 105 combinations of compound mixtures 80 000 miles on test benches