500 miles on the rtx and 1100 on the attack(both sleds stock),very strange this is in 6-7 inches powder and my RTX hooks up so good and crushes my bro's attack and he beats me in the hard pack,i would think this should be the opposite being he has the 136....across the lake i was playing catch up to him and a 800p-t but got them both before the end....i also noticed i get e batter holeshot when i have the transfer turned down to standard or below in hard pack,i just blow the track if u even try to launch hard,my conclusion the RTX needs studs bad!!!!as far as going down 1 gear on RTX,i would the attack is right there with me across the lake so cant i see where it would make a diff....