So I took a ride on my new AT81 today and I have to say I like them. I junked the VERY SCARY MX51 front and the AT81F seems to work very well. I rode San Diego's Corral Canyon OHV in Pine Valley (there are youtube vids of this terrain for reference) and it's a mix of mostly hard pack, some rocky areas and some washes that are very loose. On the hard pack stuff this tire is a HUGE leap forward from the stock MX51. It tracks well without wandering, is plush and doesn't seem to deflect as some of my 80/100's have in the past, and outright cornering produces very solid bite. Steering quickness was good and initial turn in was quick, as sometimes a 90 can lose a little to an 80 in that dept. I rate this tire about an 85/100 because there is one area of concern. When transitioning through the hard pack into the loose washes, there are a ton or switchbacks. Some lightly bermed and some just super flat. The AT81 bites hard through about 90% of max lean angle and then... BAM! It let's go in a hurry! No slide, no feedback or warning, just gone. The first time it took me by surprise as it was digging super hard through the turn before I ended up with the bike on the ground. The second time I was anticipating it and was able to save it with my foot on the ground, but it's pretty abrupt when it decides to let go.
That being said. I do like this tire and will continue to run it for a while. The tread pattern is very sharp and similar to a 756 and the compound seems a tad soft but held up very well on about 4 hours of hard riding. I was on 13psi today and will play with pressures on the future to see if I can get it to work just a tad better. But I have to give it a thumbs up.
I did not have time to bust the rear yet, but I will this week and give you guys my thoughts on that next weekend. FYI I went with the 110/100-18 as I'm am not a fan of 120 rears. For me they lose a little in steering quickness and don't seem to roll over side to side like a 110. Also I went with the standard And not the RC.
Edited by Alstar450, May 10, 2014 - 07:23 PM.