I run 27" bi/tri claw tires on my 750. They are suprisingly good on trails, and very good in mud. I use the same tire for mud, rock crawling and trails and have no problems. As for only being 4 play, who cares. I have never had a flats with them and I ride everywhere the 6 ply tires are going. If I am going on pure mud rides. I change out my front bi-claws with my Vamps EDL. What a combination for mud. See my pictures and see what tri/bi's are capable of.

 

Thanks for the pics I am running the BI/TRI Claws and I love them I put a clutch kit and a DYNATEK CDI on my BF 750 and It is like I am still running stock tires I can wheelie it very easy. You say you run vamp EDLs on the front but arent they 28" and the TRIs are 27"? Are they close enough to run them together without messing up any of your drive train?

 

Running the EDL's in the front are 28". But they measure in height very close to the 27" tri-claws. I don't know what the rolling distance difference is. I have never had a problem or felt that the tires are pulling against each other. When I run the EDL's I am 80% of the time in mud, so no issues. The EDL's are excellent for pulling the Brute out of mud holes.