I just dumped my Nitro quiver of 10, 12, 14, 16, and 18 Helium2 for Roca 11, 14, 17m. I was able to ride back to back my 18m Helium2 vs the 17 Roca and then my 14 Nitro5 vs the Roca 14. The Rocas showed noticeably better grunt and hangtime. Hangtime with the Roca's vs the Nitro's is something to exp...