I wanted something a bit taller and thought I would try them out. I prefer rocks and all else to mud, so I really only tackle it if it is on the way thru the trail (no mudbogging, intentionally looking for mud, etc). Except for lack of sidewall traction the Marshall MT's do great for the trails around here (better than TSL's in some places/conditions) and a friend liked the 33" MT/R's around here a lot, so I thought why not, if I don't like them I can go back to the Marshall's or something else and sell these. Comapring the Marshalls to the MT/R's, I found the MT/R's sidewall to be quite a bit thicker but stiffer, deeper softer tread and sidewall traction.