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  #1322212 10-Jun-2015 14:40
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heylinb4nz: [snip]

I should mention the tire wear is on the fronts, the rear tires have been going strong for 33,000 kms and counting (Bridgestone Playz)..most likely closer to 40,000 as they came fitted out of Japan.


That may be your problem - having different tyres front and back. Even though labelled the same size, it's likely different models will be slighly different sizes, so with the car at a constant speed, they want to rotate at different rate. No problem on a 2 wheel drive, but on 4WD, something has to give somewhere, and that may be 2 tyres slipping ever so slightly all the time, leading to increased wear.

On a 4WD vehicle, it's preferable to replace all 4 at the same time, so all the same size. Then rotate regularly so the wear is the same.

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  #1322215 10-Jun-2015 14:45
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Though I have yet to see video evidence I have developed a theory over the years that female humans actually eat the tread off car tyres. 




Mike

 
 
 
 


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  #1322256 10-Jun-2015 15:40
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And brake linings! I daren't tell my wife she steers with mini jerks and doesn't brake very smoothly hence excess tyre and lining wear.



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  #1322263 10-Jun-2015 15:59
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RunningMan:
heylinb4nz: [snip]

I should mention the tire wear is on the fronts, the rear tires have been going strong for 33,000 kms and counting (Bridgestone Playz)..most likely closer to 40,000 as they came fitted out of Japan.


That may be your problem - having different tyres front and back. Even though labelled the same size, it's likely different models will be slighly different sizes, so with the car at a constant speed, they want to rotate at different rate. No problem on a 2 wheel drive, but on 4WD, something has to give somewhere, and that may be 2 tyres slipping ever so slightly all the time, leading to increased wear.

On a 4WD vehicle, it's preferable to replace all 4 at the same time, so all the same size. Then rotate regularly so the wear is the same.


Hmmm actually you might be onto something there

I recall the fronts are 225/45/18 (they were $179 vs $225 for the 40 profiles), while the rears (need to confirm) may be the factory recommended 225/40/18.


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  #1322321 10-Jun-2015 17:02
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heylinb4nz:
RunningMan:
heylinb4nz: [snip]

I should mention the tire wear is on the fronts, the rear tires have been going strong for 33,000 kms and counting (Bridgestone Playz)..most likely closer to 40,000 as they came fitted out of Japan.


That may be your problem - having different tyres front and back. Even though labelled the same size, it's likely different models will be slighly different sizes, so with the car at a constant speed, they want to rotate at different rate. No problem on a 2 wheel drive, but on 4WD, something has to give somewhere, and that may be 2 tyres slipping ever so slightly all the time, leading to increased wear.

On a 4WD vehicle, it's preferable to replace all 4 at the same time, so all the same size. Then rotate regularly so the wear is the same.


Hmmm actually you might be onto something there

I recall the fronts are 225/45/18 (they were $179 vs $225 for the 40 profiles), while the rears (need to confirm) may be the factory recommended 225/40/18.



That would be so very wrong. There'd be a difference of 16 revolutions per Km between your front & rear tires.

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  #1322346 10-Jun-2015 17:50
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Sidestep:
heylinb4nz:
RunningMan:
heylinb4nz: [snip]

I should mention the tire wear is on the fronts, the rear tires have been going strong for 33,000 kms and counting (Bridgestone Playz)..most likely closer to 40,000 as they came fitted out of Japan.


That may be your problem - having different tyres front and back. Even though labelled the same size, it's likely different models will be slighly different sizes, so with the car at a constant speed, they want to rotate at different rate. No problem on a 2 wheel drive, but on 4WD, something has to give somewhere, and that may be 2 tyres slipping ever so slightly all the time, leading to increased wear.

On a 4WD vehicle, it's preferable to replace all 4 at the same time, so all the same size. Then rotate regularly so the wear is the same.


Hmmm actually you might be onto something there

I recall the fronts are 225/45/18 (they were $179 vs $225 for the 40 profiles), while the rears (need to confirm) may be the factory recommended 225/40/18.



That would be so very wrong. There'd be a difference of 16 revolutions per Km between your front & rear tires.


Not tomention the effects on the centre diff!

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  #1322366 10-Jun-2015 18:05
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heylinb4nz: 
I recall the fronts are 225/45/18 (they were $179 vs $225 for the 40 profiles), while the rears (need to confirm) may be the factory recommended 225/40/18.



Aaaand there goes your centre diff.

 
 
 
 




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  #1322400 10-Jun-2015 19:29
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Just checked 45 profile all round, should be 40 but at least its all the same.

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  #1322428 10-Jun-2015 20:42
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heylinb4nz: Just checked 45 profile all round, should be 40 but at least its all the same.


they may still have a slightly different circumference as different manufactures have slightly different diameters/widths etc

i just compaired a dunlop to a falken and there was 1.5mm difference in diameter, so thats about 1 extra revolution per km, over 16,000km its done about 16,000 extra revolutions, which is about 33km more but its the scrub thats more than likely killing it.

not sure what it will be for your current tyres, i cant find any diameter info for them

but i would change all 4 tyres to the same brand/size to eliminate that being the issue

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  #1322452 10-Jun-2015 21:50
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Jase2985:
i just compaired a dunlop to a falken and there was 1.5mm difference in diameter, so thats about 1 extra revolution per km, over 16,000km its done about 16,000 extra revolutions, which is about 33km more but its the scrub thats more than likely killing it.

That's only if you never turn a corner.  You'd get more difference around a moderate bend as they are tracking different distances.





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  #1322503 10-Jun-2015 23:37
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Falken website say these  tyres are rated for about 60,000 kms of use (that's with rotations). I could live with 3 years\25,000 kms but 2 years\16,000 kms seems a little on the low side.

And therein lies your problem they're designed for American roads which are a concrete base with hot-mix on top (ie: soft compound) where as our roads are a completely different beast altogether we use medium or large chip and no concrete base so it gets ruts and potholes which all lead to shorter tire life span here than in America or Canada 

You really should by tires designed for our roads if you want any real lifespan out of them next time try Firestone or Dunlop tires and not the full on sport type as you'll most likely only get a year or two out of them aswell  

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  #1322665 11-Jun-2015 09:56
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mattwnz: A little off topic, but If you have these lower profile tyres, where usually the tyres tread on the road is a lot wider, do the tyres wear out slower than you standard thinner tyres? I am guessing they should due to more surface area carrying the load.


It's not that simple.  Contact area isn't significantly increased with wider tyres - the amount of "rubber on the road" is mainly a function of weight and tyre pressure.  The contact shape is affected by width - all other things being equal (which they won't be), then wider tyres will give increased lateral grip (ie cornering) - but that might come at the expense of reduced grip on acceleration and braking (incl. greater tendency to "aquaplane")  Rolling resistance is increased - wasting energy in the process of turning tyre tread into black dust.  Alignment becomes more critical for tyre wear.
Wider tyres and rims usually weigh more, so unsprung weight is increased, which will negatively affect handling (especially on uneven surfaces - ie our normal roads).  Increased wheel weight also makes the car slower accelerating and braking. Even if the wheel offset is allowed for with rim selection, then the scrub radius is changed - with almost always negative effect on handling, especially under braking and acceleration when cornering on uneven surfaces.
The "GT" model of your shopping basket might have come with wider tyres ex factory, but it might also have lighter rims, different shocks, different steering geometry etc.
As a general rule - stick with standard width rim and tyre sizes specified for your car.  If you want fancy looking wheels without compromising "handling" then be prepared to pay serious $$ for light-weight quality rims - not cheap "mags" from some boy-racer "speed shoppe". If you want increased grip/performance, then do some research and buy quality tyres of the standard size - that can make a big difference and without negatives - except that more "grippy" softer compounds tend to wear faster.  

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