I just put a set of GBC Grim reapers on my 850 xp.
We were out at the pit this weekend and i was really impressed. They hook up real good in the gravel and the dirt also pretty good in the mud. There alot like the dirt commandors. There 8ply made in the USA!!!.
The only thing i had to compair them to was my budys mudlites. The mudlites didn't seem to grip the rocks like the reapers but they were some what better in the mud. The only bad thing for me was i have 14" rims with 26"tires.
I should have went one size bigger, i think it would help protect the rim a little more.

 

Guys,

I got my Duro Power Grips! I like the look / size for sure!! Here are a few pictures up against the stockers on my 07 Grizz 450. I bought 25x8x12 fronts and 25x10x12 rears! The Duro 25x8x12 fronts are the same physical size as my stock 25x10x12 rears!!

These tires are going to make a HUGE difference on my grizz 450! For the price and from what I read about other riders remarks - I don't think these can't be beat!

Fronts





Rears




-CS-