On the DOT issue, beware. I rode for decades out west on forest, BLM, and national park lands and was never asked or inspected about the certification of my tires on any of the road portions of my rides. Twice in the last year I have been asked...once by a ranger and once even by a sheriff deputy who was patrolling forest county roads. Like it or not, more scrutiny seems to be the norm for some reason. While singletrack and many 2-track routes are considered off road, many of the more popular routes and connectors are actually county road designations where authorities can require all manner of equipment regulations.

 

trackmaster 2 is a great rear tire, works great here in newfoundland on mud, dirt, rocks and street(as long as its not too full of air) i wouldnt put it on the front tho. i have one on the front and it slides out on me, have to get a new one

 

I'm off road 99% of the time and in sugar sand 50% of the time. I run them around 15 psi. Got about 1000 miles on them and they are holding up great. I love the TMII's front and rear.

 

That's odd. I can't stand the TMII's but love the AC-10's. To each his own.

 

Trackmaster II Rear Tire - what's your preferred size?
100, 110, or 120?

 

Ok so someone remind me or educate me. Stock the KLX came with the 100 tire, and I ran the 120 dunlop 606. Is that number the width? The Dunlop 120 fits perfect, but I think a 130 tire would rub on some brands. I think I will be fine with the 100 but is there an advantage by going to the 120? Isn't there some info on power getting robbed the wider the tire is? I'll await all of your opinions and knowledge.

I feel like a noob again. LOL

 

i have the 120 trackmaster 2 on my bike and it is the with. its a little big, as it has groves rubbed into the chain guard.

as for less power with bigger tire it seems to me that its just more diameter for the bike to spin per rotation, so it will do less rotations to go the same distance, sort of like if you put a smaller sprocket on the rear, the smaller sprocket would have to spin more tire, basically the closer your rear sprocket diameter is to your tire diameter, the more power. so if you get a larger diameter tire the ratio is in favor of speed rather then power.

as for increased width decreasing power, that is purely because the bike has to spin a tire that has more mass/weight but will have much less effect on a dirtbike because it does not fluctuate very much.

 

Deej, I think you're right on stock size. From this page: https://www.kawasakiforums.com/forum...q-links-30733/

Front tire (metric)80/100-21.......(inch)3.00x21
Rear tire (metric)100/100-18.......(inch)4.10x18

Yes, the wider the tire the heavier it is, and more mass will rob power response. The energy goes into making the mass of the wheel spin instead of transferring it to the ground. I presume this isn't much impact to someone riding smooth roads and trails not needing peak response and will have more impact to riders needing a quick response (e.g., trying to jump over a tree root on a steep climb). The first tire I bought was a 130 (see this thread, post 12: https://www.kawasakiforums.com/forum...-tire-s-35829/).

There must be benefits to wider tires (more knobby on the ground) but I'm guessing one needs the power behind it to make it worth while. There's also the benefit of the "cool factor."

 

So it rubbed a little? I wonder if I should get the 100 then.

 

100/100-18. The first 100 is the width (in millimeters), the second 100 is the percent of the width that is the height (so in this case, also 100 millimeters). And the 18 is the rim diameter (but everyone knew THAT)
80/80-21 = 80mm width, 64mm height, 21" rim.