17 years old. 140 pounds 5'10". I'm trying to decide between the piranhas or hyperspeeds to train in. I used the older version of the hyperspeeds last summer and thought they were alright. But I'm wondering if I should stick with them or not. I'll be running mostly on the trails so it's not too hard of a surface. Towards the end of this track season, I was using the streak xc's quite a bit and liked them. However, I feel like those might not be a very good idea because there's like 0 support on them.