well im bout to take the rim down to get a tire installed, and im stuck between the 3 tires, i ride mostly desert. what do u guys thing outa the three? d739 a/t 120/100-18 pirelli mt18 120/100 heavy duty or the maxxcross desert LT 120/100-18. help me out guys. by the way chaparral motorsports has really good deals on tires every thursday.