I am thinking about ordering/installing Excell wheels on my 2008 Nytro MTX. I know there are Kimpex, Doo/Poo wheels I can use also. I had Kimpex on my SRX for thousands of kilometres with no issues. Anyway, I have a total of 8 wheels in my skid....6 on the outside and 2 on the inside. Do I require ordering 8 wheels? I was thinking of doing the outside wheels only, but I don't know. Thirty bucks x 8 wheels (plus tax plus shipping in Canada) is a big hit. I know Kimpex are 5 bucks cheaper each, but do I go 6 or should I go 8?