Had my first ride on my new rear tire yesterday. I have an 01 KDX all stock except for a few guards here and there.I opted for the 110/100-18 because every one said that the Maxxis tires run a bit low on profile. They were right on about the size, it was just about 1/2" wider and a hair taller than stock which was just what I was looking for. Got it at Rocky Mtn. ATV for $40 plus shipping ($11 to TN). We went to Windrock and it was anywhere from dry and dusty to muddy. It had big rocks and clay mud and about anything else you can think of. Later on it started raining and everything was a mess. I'm a new rider and all I can say is WOW what a difference. I usually dump at least two or three times due to and losing traction and momentum on big climbs. My usual riding partners are more experienced than I am and they were having trouble on areas that I seemed to do just fine. I didn't dump a single time! I might also add that I did make a sag adjustment that was pretty far off from stock ( I am not the original owner of the bike and you know how that goes). I'm tickled to death with the Maxxis IT and am thankful for all the input I've gotten here from everyone. This Message Board ROCKS! Hope this helps you decide on a tire! Maxxix IT, for the price and performance it is awesome!