A&MDAD. BIGHORN'S with 6psi all the way around. i used a framing square on the floor, with a level comming off of the center of the axl nut.

front had 11 3/4"
rear had 12 1/16"

i checked both fronts and rears to make sure i was getting an good reading. they were the same.

 

Thanks a bunch Deerchopper. I really wanted to see how the Bighorns fit in. Looks like they are virtually identical to the stock tires. I really need to get the Dirt Devils measured next week.

 

your welcome.

when you get this list are you going to post it somewhere? has anybody gave you the specks on the maxxis alltraks? i would like to know more about those tires as well. they are a bias ply tire.

 

The only info I have so far is what you see posted here...not much. I'm going to start working tomorrow on getting it into a format that is undertandable...then posting it for everyone. Might take some time to get a fairly decent number of tires on it at the this rate. [img]i/expressions/face-icon-small-smile.gif[/img]

Unless we get a blizzard next weekend, I should get some more measurements from some of my buddies. We're going desert riding, looking for trophy mule deer as they come onto their winter range.

 

I have a 60' tire rack, full of different tires, from 33" tractor tires, to 22" sport quad tires, all with rims to fit our Prairies...

33" X 7" X 16" Tractor treads
28" X 8" X 12" Maxxis Mudzilla's
26" X 8" & 10" X 12" Goodyear radial MTR's
26" X 9" X 12" Goodyear Mudrunners ( solt to a friend, still testable though )
25" X 12.5" X 12" Interco TSL's
ETC...
ETC...
ETC...

you'll need to note the wheel width as well as the tire info, as this will effect the with & O.D.... I.E. my 12.5" TSL's, are my pulling tires, & all 4 are mounted on custom 12" X 12" aluminum wheels, & they have a very different profile than my 22" X 12.5" X 9" TSL's, mounted on 9" X 9" wheels... you'll also likely see very different Tire O.D.'s & weight differences, between the same O.D. tire, & different rim diameters...

How can I help ???

 

Thanks for wanting to help Newbeatle...I guess to sum up my thoughts on this database...It just seems that with all the variables out there in tireland that "loaded radius" is what most of us want. We might think we want "diameter", but for most of us it all boils down to clearance and "loaded radius" is the most accurate measurement of this. Then most of us want to factor in weight somewhere too. It would just be nice to go to a chart with all of the different tires listed...and decide which tire and size fits our needs best.

If I can get a 25" "Mudblaster 500" that weighs 22 lbs. and its "loaded radius" or "clearance factor" is just as high as the 26" "Slopbuster" that weighs 28 lbs., then I'll probably buy the 25" tire. (Plus it will probably be cheaper too!)

The loaded "squish" factor will surely be different for different tires, that's why I thought it would be best to measure the "loaded radius" as opposed to just measuring diameter. I also agree with you on the rim width comment. Perhaps we should try to stick with tires on rims that are between 6" and 8"?...hopefully this will cover most rim set ups, while at the same time being somewhat consistent in our measurements.

Let me know your thoughts!

Thanks,

Larry

 

Got some new tire info this past weekend...

Dirt Devils:

25x8-12 Loaded radius 11.625"
25X10-12 12.000"
23X10-10 11.250"
23X8-11 10.625"
23X8-10 10.875"
22X11-9 10.750"

Dunlop KT 125:

25X11-10 12.000"

Looks like the 25" Dirt Devils have basically the same loaded radius as the other 25" tires, including the Bighorn radials. So much for them being "shorter".

I have quite a bit of the spreadsheet done. Still trying to figure out how to post it somewhere so that it's easy for everyone to find. Also, still looking for measurements. Would love to have some Mud-lite, 589 and 26" Dirt Devil measurements. (Anything else too!)

 

Good thread! I would like to know if the small diameter difference between the front and rears
would be detrimental to stantard 4x4 systems. I always thought that the fronts and the rears needed to match
to keep the gears meshed together. My stock tires (haven't measured diameter) are the same size as the DD's
you listed(25x8x12;25x10x12) and I assume that there is a small difference as well.. You show a little less than 1/2" difference in the DD's, I guess I was wondering if this small difference will hurt an atv, while in 4wd. This is just something I thought of while seeing your thread.

 

Hi Joe, I was thinking the same thing about tire height when I first measured the stock tires on my Prairie 650. A couple of thoughts...this doesn't take into consideration the "rolling circumferance" of the tires. Perhaps if I measured the distance both front and rear tires cover in one revolution, they might be similar. Honestly I doubt it though...I have had 3 Prairie 300s and a Prairie 400...all full time 4X4's...and they were all hard on front tires when I did much pavement driving. I think when we are buzzing around off road though it doesn't make a whole lot of difference.

I apologize for not getting the info posted quite yet. I do have the info that I have received so far posted on an Excel spreadsheet. Just need to take the time to get it on a servor somewhere and create the link.