I've been running Grim Reapers on my Prowler for almost two years. They've been great tires, but I want to try something different on the WC if it ever comes in!!!! I've pretty much narrowed it down to the Pitbull tires. I've been reading all over the net and haven't found anything negative about them yet. I'm wondering though, which one is better overall but would really excel in the technical riding? I tend to ride mostly tight trails loaded with rocks and steep hills with all of that combined most of the time. The Growler is directional and from what I've read, they're better in soft dirt, mud and such. Any input would be nice from someone with experience with either tire.