Maxxis Tyres

what wheels were they on?
what vehicle is it?
If it was a centre diff lock it was probably getting wound up a little and reversing back with wheels locked right then left would probably fix it.

Did you have all 4 the same tyre or different front and back.
I cant see even thou it did happen why.
When people run 35 etc do they have the same problem.

All the best
Eric

dsbomba,

It is not the fault of the tyres!

Putting 2 new tyres on one axle and then using 4wd is a sure way to develop some transmission wind-up. This wind-up is what makes it hard to shift out of 4wd.

The make of tyre is irelevant, if there is a serious difference in rolling radius between front and rear tyres transmission wind-up is almost inevitable on firm surfaces.

IMHO it is always advisable to replace all 5 tyres at the same time and to rotate the wheels according to the vehicle handbook. This tends to eliminate the differences in rolling radius betweenall 5 tyres.

Others may have different ideas on tyre rotation.

Disco.

every make of tyres have a different rolling diameter. i have had this problem when replacing damaged tyres and using the 2 new ones on the back.

it is not the tyre manufacturers fault. you should not be running different tyres front to back.

i run 35's on my patrol and never have a problem

anyhow i wouldn't be complaining about the larger diameter i would have got rid of the other 2 old ones

Proof that even ............'s dream

Stop playing with yourself and get real ...What 4wd you talking about ? Make, Model etc...

They replaced the tyres ! What Tyres..

Are u a Dickg\head ?

Kieth P's right. A 50mm bonus. Should of bought two more!
Anyway the answers obvious. Any part time 4wd with the normal, non slip engagement won't like different rolling diameters. You can get away with it if you only use 4wd when you really need it, on surfaces that allow slip.

Like others who have much more knowledge than me, it seems you would not have had the problem if you were to replace all four of your tires.

In the mountain biking sport, Maxxis certainly is one manufacturer known for their tires running "bigger" than the stated size. Likewise other manufacturers (Michelin etc) may measure slightly smaller than stated. But in the MTB sport this is generally known and taken into account, being that mountain bikes only have clearance for tires of certain width.

It's certainly interesting to know that it can be the case when it comes to cars as well! Maybe I'll consider Maxxis when the Subi needs a new set.

strange to me it almost sounds like they were 265x75s
dumn Q but you did check that the worng ones werent put on?

I recently put the same tyre except in a 30x9.5x15 on the missus ute. I would have gone to a 31 but there was 1/4 inch clearence on the carport, so fthe Maxxis were bigger than the BFG she was running of the same size it would have hit

Interesting. I have worked in the tyre industry for some 30 years. The Max tyre you make reference to, in fact has a rolling dimention of 2465mm. We looked at a Cooper ATR, it measures 2425mm. Similarlar measurements were obtained from a BF Goodrich AT, Yohohama Geolander AT and a Bridgestone D694. We allowed a leaway of 5mm eitherway when we measured these, We measured by placing a tape measure around the centre of the tyre, fitted to a rim and inflated to 36psi. The Max was vastly different and had the longer rolling diameter out of the tyres we measured. Over a measured kilometer the max would turn 405.67 times. The others would turn between 411.52 and 413.22. One would assume that this variation would not be good if operating in 4WD. Manufacturers often do not specify a rolling diameter. Some list a tyre height. A test for all you out there. Put a Max next to another brand. It is definately a taller tyre. This would explain the winding up of your transmission and difficutly from coming out of 4WD. The Paj was originally fitted with a Yoky Geolander, vehicle owners often may have a different spare. The Paj has a limited slip diff, the use of different rolling diameter tyre with such a difference would also trick the diff into thinking it was losing traction if it was fitted to the rear. Your dealer seems to have been educated like we were with the Max.

Hi Guys,

This thread really had me confused for a while. It appears the references to 'rolling diameter' is actually referring to circumference, ie the distance measured around the tyre. Diameter is the total distance or height of the tyre and rolling diameter refers to the rolling height which is twice the radius measured from the ground to the centre of the wheel hub when the tyre is mounted and fitted to the vehicle with the vehicle and inflated to the correct pressure.

This is also what is compared to in the term 'loaded radius'. Loaded radius is a defined specification available from some tyre manufacturers. If you know the correct loaded radius for a given tyre, you can work out how much pressure should be added or reduced for any given load in the vehicle and the loaded radius should remain the same for each tyre at any load. this avoids both over and under inflation. Remembering that this is applicable for sealed roads only and excessive weight may require additional pressure beyond the maximum recommended pressure. Loaded radius data is usually only provided for Light Truck and truck tyres so would not normally be available for the 265/70R16 of this thread which is mostly only available in PMetric sizes.

Hope this doesn't confuse the issue further.

John