We are at work discussing the ATR's and a fella says the radials flexible side walls will be more prone to punctures and cause a loss of a half inch or so of ground clearance. Hmmm?
I go to ITP's site and get the phone number and call them up.
I asked about the more prone to punctures thing and he says absolutely not. Of course he would but HoleShot tires have a good racing reputation so I tend to agree.
Then I quiz him on the ground clearance thing. He says "Huh?" I say if I have 2 P650s'. One with OE Dunlops and the other with ATRs' and put 3.5 psi in all the tires, would the ATRs' sit lower. He says It may because the ATRs' are under inflated. He insisted the design calls for them to run 5.5 psi on all four corners.
He goes on the comment on how the radials will out perform and ride the OEs'. He tells me not to get the air psi's of bias tires confused with the requirements of the Radials.
Well boys we shall see. I have a set on order. I pick up my Brand new Green P650 Tomorrow morning. The ATRs' did not ship in so he will be sending them to me next week. I'll have a set of Dunlops for sale cheap some time after that.

 

Thats interesting that they said that about 5.5 psi. I've always run 4 front and 5 rear psi like the stock tires in my ATR's, 1200 miles on the them at 4/5 psi with great results... Good luck, enjoy your p650.

 

I just mount a pair for the fronts on my quad, been too busy to try them out lately though... I find this info interesting, as I've had several people tell me they dumping thiers, because the can't keep them on the rims... I'll bet they are trying to run too low of air pressure for the radial tires... I currentl have 8-9 lbs in mine, I'll take it down progressively, till I find a pressure I like, just have to keep that 5.5 lb pressure in mind for the bottom pressure... thanks for the post ...WAM

 

The ATR's are an INCREDIBLE tire! Great in most terrain EXCEPT deep mud. If you ride fast trails, THESE are the tire. I cannot say enough good about them. YES, you should run a little more air press. in them. I generally ran 4.5-- 5.5psi, as a rule. BTW-- my area of operation is the Appalachian Mtns. of S.E. Ohio (WNF)and S.W. WVa(Hat/McCoy)

 

I run 5psi in the rear and 6psi in the fronts. This give me equal height. BTW my height is 24" with this psi.

The ATRs are a great tire.

 

I hear they are on the short side compared to the OE Dunflops? Anyone do a side by side?

 

Seems like most tires in general will measure up about an inch short of what they say after they are mounted on the quad and have weight on them. The dunflops on my 660 are pretty short. I've been looking at ATRs some, but I don't really want to drop that much cash on a trail tire. You can get some 27" mud tires for the same price (though I don't need them).

My 27's lug the grizzly down some (and I think its the belt drive), but I figure I could go with a 26" trail tire with a lower weight and still have decent acceleration. Maybe a Shur Trac rear and some other 26" front. Have also though about going with 25" All Tracs as well. Seems like a similar tire to the holeshot only in a crappy 2 ply and not a radial. If all else fails, I'll just put some cheap *** dirt devils on there.

 

Well I am going to measure floorboard hight before & after with me ( 245lbs) on and off the seat. The ATRs' require 6 or so psi so that will be the case. I will also take my digicam to the tire shop and record the mounted ATR next to a mounted Dunlop and post it on my site.
Also I would like to mention I found my front end Toe-in to be more than 1/2 inch. It is now 0. I used Nyroc's method.

 

therock-- There IS no comparison to the stock Dumflops. The ATR's are an incredible tire in most any terrain. I was truly amazed the first 2-3 times I used mine! I never have heard any negative feedback about them, EXCEPT, that they are not available in more sizes(only one size right now). I have a feeling we'll see that little glitch fixed. These tires were MADE for big, fast Ute bikes!

 

Took Delivery of the ATRs' today. Mount them tomorrow and will do some good riding time Friday.
I did not comment on how much improved the ZERO Toe -In setting has made my handling in a previous reply. I had not ridden it yet. I did today and WoW! Much Better. The slow turns were killing me. Not as good as my old Kodiak but better. I wanted to do the toe in and try it on the Dunlops to see if it helped. Now I will see how the HoleShots handle.