I have KT 857 on my 4-wheeler now and as far and the ride and traction during trail riding they are great tires. I am just curious if i should go with a more aggresive tread like the KT705. My ? is which would be the better ride and get more traction in the trails.. The 857 has a bunch of knobs on it and overall does good and the 705 has the V design in the middle is self cleaning and supposed to be good traction too and im just hoping someone here has had them. Thanks for your time.