35"+ Tire Roll-call... (200's only) (13 Viewers)

[TonyP]

Never had body mount rubbing with 35s.

 

[Markuson]

I don’t understand the body mount concern... My 35’s don’t touch body mounts at all.

Rather, a couple points during deep stuff in front, I’m barely snagging the screw at the front well out/bottom.

In the rear, having NOT added larger bump stops...I touch the smooth wheel well surface at a couple points on full stuff at speed.

 

[TeCKis300]

I don’t understand the body mount concern... My 35’s don’t touch body mounts at all.

Rather, a couple points during deep stuff in front, I’m barely snagging the screw at the front well out/bottom.

In the rear, having NOT added larger bump stops...I touch the smooth wheel well surface at a couple points on full stuff at speed.

I could be completely wrong as I've not personally done 35s as you have. If I didn't tow as large of a trailer, I would.

If I recall, many that have gone to 35s and larger, use the strategy of bringing the tire forward (and away from the body mount) via adjustable upper control arms? I've also read reports of individuals destroying their CV's having pushed the tire forward too far to make clearance against the body mount. This is just the recipe that has been used generally. But perhaps there's another technique.

From @supercarrera 's recent attempt at 35x12.5s, the body mount certainly is a consideration. More pics in this thread I had 35's installed today and this is how it went

 

[Markuson]

I could be completely wrong as I've not personally done 35s as you have. If I didn't tow as large of a trailer, I would.

If I recall, many that have gone to 35s and larger, use the strategy of bringing the tire forward (and away from the body mount) via adjustable upper control arms? I've also read reports of individuals destroying their CV's having pushed the tire forward too far to make clearance against the body mount. This is just the recipe that has been used generally. But perhaps there's another technique.

From @supercarrera 's recent attempt at 35x12.5s, the body mount certainly is a consideration. More pics in this thread I had 35's installed today and this is how it went

I’m definitely adjusted forward during alignment...Slee KDSS relo...and finally .75” Bora spacers.

 

[TonyP]

I didn't adjust anything, no body mount issues. It rubbed everywhere else. It's a task to get 35s to fit on a 200 and there are many compromises.

 

[Markuson]

I didn't adjust anything, no body mount issues. It rubbed everywhere else. It's a task to get 35s to fit on a 200 and there are many compromises.

Ya, I just had Nitto warranty my Ridge Grapplers. I found out after the fact that I didn’t have to replace them with the same tire. Had I known that, I might well have gone to 285/75/17...for basically the same height, but a bit narrower. You could almost call the 285/75 RGs a 35x11.5x17...since my 35’s are closer to 34’s.

 

[Mogwai]

Ya, I just had Nitto warranty my Ridge Grapplers. I found out after the fact that I didn’t have to replace them with the same tire. Had I known that, I might well have gone to 285/75/17...for basically the same height, but a bit narrower. You could almost call the 285/75 RGs a 35x11.5x17...since my 35’s are closer to 34’s.

Why the warranty replacement?

 

[Blasst]

Seems everyone running 35's are actually running 34" tires. 34" is exactly what I want. I am interested in the actual size.....not what is printed on the side of the tire.

Seems to me the actual size is what is important since it determines what we have to do to make the tire fit without rubbing.

 

[Willy beamin]

Ya, I just had Nitto warranty my Ridge Grapplers. I found out after the fact that I didn’t have to replace them with the same tire. Had I known that, I might well have gone to 285/75/17...for basically the same height, but a bit narrower. You could almost call the 285/75 RGs a 35x11.5x17...since my 35’s are closer to 34’s.

if you consider your RG's 35's almost 34's then you may consider the RG 285's almost 33's. 285 = 33.86 x 11.2 //// RG 35's are 34.76 x 12.52 = over an inch in width / foot print and .9" in height. 285 RG's are 10 lbs less weight per corner

 

[TonyP]

Look on the manufacturer's website. They usually have the true measurements on there.

 

[TexAZ]

@Blasst , I tried a couple years ago to get a "true" size data base. most information is anecdotal at best.
all I wound up with was a multi-page debate on how to measure tire size. mounted, aired up, on spare, etc...
from what I gathered, the Toyos and Nittos ran pretty close to advertised size, BFGs run small, and Coopers run large in the STT pro.
again, just my anecdotal research.

 

[Markuson]

Look on the manufacturer's website. They usually have the true measurements on there.

Ya, but their measurements seem to only be accurate if you put 60-80psi in them...which we’d be nuts to run.

 

[TonyP]

Obviously the psi will effect the installed height. I would hope that's obvious.

 

[Markuson]

Obviously the psi will effect the installed height. I would hope that's obvious.

Yes, of course. It would just be helpful if manufacturers tended toward actual-use pressures when formulating size claims. No one runs KO2s at 80 PSI....so giving size data based on 80 psi is more than a little silly.

Also... It would be helpful if reported tire “height” by users like us should be measured front to back to eliminate truck weight/squat entirely.

 

[HDJdreams]

Yes. It would just be helpful if manufacturers tended toward actual-use pressures when formulating size claims. No one runs KO2s at 80 PSI....so giving size data based on 80 psi is a little silly.

I bought the 34x10.5R17 KO2s the month they were released for my 80. Great tires, but disappointed they are actually 33s”. BFG seems to be one of the worst for overstating size.

 

[TeCKis300]

Also... It would be helpful if reported tire “height” by users like us should be measured front to back to eliminate truck weight/squat entirely.

Unless I'm misunderstanding you, that technique is not going to work.

 

[Markuson]

Unless I'm misunderstanding you, that technique is not going to work.

Not sure what you thought I meant. I simply mean...as it sits on your truck...measure the front facing tread...across to the rear facing tread...rather than ground to too as many tend to measure.

Not sure what your drawing is meant to imply. If you mean tires squat in an oval and get wider at 3 and 9...they don’t. That’s just not how tires deform under a truck at all. They squat shorter between the center of the lowest wheel edge and the bottom, but they don’t squish outward at 3 and 9 like a water balloon, and they don’t get shorter on top. They simply squat near the ground. I see an arrow pressing on the top of the circle in your drawing. But there is no force pressing the top of a mounted tire.

Super-impose a clock face as you look at the tire from the side on your vehicle.

Tires do not get bigger at 3 o’clock and 9 and certainly don’t compress at 12.

 

[TonyP]

It's not really practical given the tire height (at most commonly used psi's) will change depending on the vehicle weight. Manufacturers aren't going to supply a 50 column excel showing all of the loaded measurements of a tire. Not to mention other variables that can contribute to the measurement. Throwing out the vehicle weight variable is the best method of specing the tire for the masses. That said; unloaded, aired up, installed on a recommended width wheel, tire measurements are available.

 

[grinchy]

I’d support manufacturer and model binning. Like BFG KO2 run small. Falken At3w run normal. Cooper st maxx runs large.
So what is the experience on cooper discoverer at3 xlt on this scale?

 

[TonyP]

Meh...

Defending the manufacturer’s practices doesn’t make it any easier to figure out what will fit etc.

I’m hoping these discussions are more aimed at easing that puzzle for readers here rather than defending practices that lie at the heart of the confusion.

Yes. They follow a general practice. But that very practice is what leads to countless cases of buyers not ending up with the real world dimensions they sought.

Defending the present conundrum helps no one here.

I don't know what to tell ya. In my experience the tire sizing (ie 285/75r17) are not the same across manufacturers. Which is wrong since it's a black and white measurement. But whatever. However the true sizing they list is generally accurate from what I've seen.

I’d support manufacturer and model binning. Like BFG KO2 run small. Falken At3w run normal. Cooper st maxx runs large.
So what is the experience on cooper discoverer at3 xlt on this scale?

Not in my experience. Cooper lists the 285/75r17 as 34". I measured it at exactly 34", uninstalled/loaded and aired up on a RW.