Tyre value calculator from Coopers

I have no connection of any sort with Coopers.

Anyone can take this formula, hunt for the wear and grip tags, and do the numbers with any make and model of tyre.

This is no more advertising than links that've been posted to Coopers' pressure guide.

A friend of mine out Mickey Thompson MTZs on his GU Patrol, they increased his consumption by 3l/100km. He didn't my leave them on long!

The UTQG is apparently applied in all countries.

Not though to proper 4by tyres it seems.

(And I have trouble with crits of a formula for not encompassing data that's not publicly or readily available.)

Shaker an aspect of fitting larger tires such as going from an HT to an AT or then a Mud tire such as an MTZ is that even though the tire size is the same in reality it is not in overall radius , every even slight increase changes the speedo and odometer reading to what 'seems' to be a detriment of fuel economy …..Toyota is renowned for being 4km under at 100km from factory with factory tires , the only way to check if fuel economy has changed is by GPS distance pre & post tire change.

You'll also find that the width figure applies to the max cross section not the tread. The tread width varies affecting rolling resistance and so also fuel consumption.

There is no doubt that tread design has a significant effect on fuel consumption (more aggressive generally = more fuel) as does casing design (stiffer side walls = more fuel).
I run Michelin XDE2s on the OKA. Tour operators report over 100,000km with these and I typically get 80,000km, but on a few roads I can destroy them very fast by extreme chipping if I let the speeds creep up.

Every tyre is a compromise.
The best one for this vehicle and this trip is a bad choice for this vehicle next trip.

Cheers,
Peter
OKA196 motorhome

The problem is a 'perceived' increase in fuel use due to the difference in ODO readings after fitting slightly larger / aggressive tires…as stated above , Toyota has forever and a day set their speedo a 4km HIGHER than distance / speed actually travelled on factory fitted tires .EG Speedo reading 100klm per hr the vehicle is actually travelling at 96klm per hr but the ODO reads 100km traveled, Now when a slightly larger tire is fitted [ 4% ] the speedo gets to read true [100 =100 ] BUT in Toyotas at least the ODO now reads 4klm LESS per 100KM actually travelled giving the perception of less km per lt….General 'perceived' fuel usage increase due to tires is in fact much of an "urban myth" due to the fact the ODO now measures the actual distance travelled 4% lower ...

Nope.
Fuel consumption (real, corrected) between tyres can vary enormously.
Yes, the odometer accuracy must be established for each one.
Try a set of cross plies and see how you go after correction.

Cheers,
Peter
OKA196 motorhome

This formula addresses expected tyre life, not impact on fuel consumption.

The formulae is supposedly comparing tyre value - in $$$$s - and there is more to value than kms of life that is why in my opening post I described it as a narrow view.

Cheers,
Peter
OKA196 motorhome

Alloy c/t, both my friend & myself are very aware of the correct way of checking fuel economy, FYI he used GPS to record distances & he used the same diesel pump at the service station. The weather conditions & altitudes were also very much the same.

I would've thought the heading was pretty clear.

No way on Earth has an AT22 12mm of tread depth ,no matter what mr Google says ,further more Coopers do discount IF you ask nicely, was originally quoted $350 X 5 when wanting 265 / 70 / 17 , ok .. fitem ,,, 5 min later ,sorry only have 3 in stock ,but can give you 5 x 285 / 70 / 17 which are normally $389 ea for the same as previous quote and will do wheel alignment in deal ….70,000 k later still have 6mm tread depth measured from ON TOP of the wear indicator bar.

Try pricing the 285 65 17, the one they have in the formula. Even so, with that price, you only waste about $500 buying Coopers by their calculations.

It's not a test. It's a formula - using ratings and dollars.

Alright its a formula...a very one sided formula that will always favour coopers when selective tyres are chosen...Nothing more than advertising crap. Anyone who seriously uses this formula to decide which coopers tyre suits them is completely gullible to anything...imho.

A not commonly known fact is that some tyre manufacturers produce a specific tyre with less tread depth for factory fitment OEM use. The same tyres retailed and sold to the public have a deeper tread depth. Its not about the dollars, its about the dollars.

Big fish - we can assume that grip and wear ratings are assigned by the manufacturer. Anyone can lie to make a tyre look better if they think they can get away with it.

But this formula isn't Cooper-specific.

Like pretty much everything Cooper publish it is biased to suit coopers sales advantage.

It is an over simplistic mostly invalid throw away piece of advertising rubbish, ( puffery I think is the technical term) like most of what cooper publish to try and convince people that their fairly average product is worth paying far more for. ..... pretty much standard US sale practice.

Like their Km guarantee ........ look at the terms ........ then compare what people actually get out of similar tyres ....... ignoring the fact that hard tyres and old school patterns are mostly not a good performance choice.

Like their 4psi rule, that so many consider gospel ....... their 4psi rule simply does not work reliably on all size and construction tyres on all vehicles ...... if you have a light vehicle with tyres running very low in the load range it does not work AT ALL.

just like selling people tyres based on how much of what sort of work they do ...... it has no basis in fact or practicality ....... it is a spurious sales tool nothing more nothing less. .... the premise is that if you are serious about 4wd and remote area safety you will pay more for a more aggressive tyre.

they want their customers baffled by bullshit ........ because if people dealt in and understood the real facts they would realize that, especially in Australia Cooper tyres are heavily overpriced ..... like most US derived products in Australia

In my experience and in my opinion, no matter what the purpose or the tyre compared, especially in Australia there is a better tyre at a lower cost from another more experienced manufacturer.

cheers

Exactly,
I would rather a tyre that has grip rather one is going to last forever.

That awesome hard wearing tyre won't be a saving you money when you're slid off the road

From the information I have .... Cooper use fairly old rubber compounds and pretty crude tread patterns.
Many of the European and Asian compaines that are many times bigger and have more R&D resources are using modern compounds that result in a softer tyre that does not rely on being hard, to wear well, they also use some pretty clever tread patterns that work better without looking as aggressive and sacrificing on road performance and wet weather traction.

these clever tread patters look finer, but their off road traction is better and because of the shapes of the voids they clear better than cruder patterns.

big double page adds in every 4wd mag and free tyres to any personality that asks, don't make a good tyre.

cheers