I have that cam in mine and it rips in the upper rpms. It should be fine for trails. Its always nice to have the power when you need it.
But its sucks when you need it and its not there.
I really did not notice any loss of low end power with the install. But I also installed an 11:1 piston at the same time, which probably offset the cam install.
I was gonna say I'll let you know, getting one installed as we speak. The guy at the bike shop says he's done a couple & it "livens" them up quite a bit. I just have the other Big 3 besides the cam, no 15T. IMO i'd say the 15T would hurt you more on tight triails, I didn't like it on the trails, found myself doing the 2 to 3 shift a lot.
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