Tyre pressure - Cooper ATR

[Drew Advanced Member Find all posts View Profile Close Drew]

I've fitted a set of Cooper ATR 265/65R17s to our Prado. The tyre place that installed them had them inflated to 38 psi. :shock: Needless to say the ride was a bit firm like a skateboard!

The tyre placard recommends 28 psi for all driving/load conditions on the 265 tyre, so I dropped them to 32 psi.

What pressure are other ppl running?

I'm going to phone the tyre dealer and see if the tyres actually need to be at such a higher pressure incase I've missed something.

Cheers all,

Drew.

[pcm_120 Member Find all posts View Profile Close pcm_120]

Hi’a Drew.

I was running mine at 38psi on the road, but after a chat with the South Aus Cooper man, he recommended 32psi. I felt this was a bit to low so I am currently running 34psi (cold). The 4psi drop made a difference to the ride in that is softer but I found the vehicle seems to wallow slightly due to the tyres flexing more with the lower pressure.

When I manage to pull my finger out, I plan to try 36psi.

Paul.

PS. I am running 265/70/17 ATRs.

[Jon Avid PP Poster! Find all posts View Profile Close Jon]

Cooper ATR's

I run my Coopers at 42psi for highway driving.
I have found that they will wear on the sides very quickly at lower pressures driving on hilly, winding roads where I live.

[Rhetly Junior Member Find all posts View Profile Close Rhetly]

I was tossing up a couple of options for new tyres just before I left Brisbane, It was down to the ATR's or that other number that gets mentioned on here quite a bit........................or the silent armour. I am glad I didn't wait for those now!
Anyway, the 10K balance etc is due in a few hundred k's and I have been vary happy with them. The dealer in Brisbane inflated initially to 34psi and when I left Qld for Katherine towing a Jayco Outback, I inflated the rear to 40 and the front to 36. Just shy of 4,000K's later, I couldn't be happier.

[McBAIN Avid PP Poster! Find all posts View Profile Close McBAIN]

i run my ATR's at 38... mainly because i want them to last longer and they get me in and out of where i want to go!

I've just had the 20k rotation done.. but i really don't think they are going to make it to the supposed 60k warranty!

[lc120_man Advanced Member Find all posts View Profile Close lc120_man]

I ran Craptecks at 38 PSI from day 1... Done 55K on them

[Friar Junior Member Find all posts View Profile Close Friar]

G/Day All is anyone running 265/70/17 ATR, if so has it had any effect on fuel consumption,AUTO D4D, thanking you Friar.

[Friar Junior Member Find all posts View Profile Close Friar]

G/Day All, my 265/70/17 ATR Cooper Light Truck have been on the prado for 800kys going back in the morning for the 3rd time to try & get the balance correct, think they are going to do it on the vehicle this time, anybody had similar problems ,Friar.

[McBAIN Avid PP Poster! Find all posts View Profile Close McBAIN]

i had a fair bit of wheel shudder for a while, just got the 20000 rotation done and they fixed it...

just wasn't done properly...

[Rhetly Junior Member Find all posts View Profile Close Rhetly]

Had my 10K balance, alignment etc done yesterday on the ATR's.

Had it done in darwin and were happy with the job the lads did on it.

There is a bit of discussion on Lcool atm on the blowout issue. I am trying to track down what psi the guy was running when it happened.
Anyone able to help me out?

[craig Member Find all posts View Profile Close craig]

this is from the LCOOL web site about the last tyre that blew.
The tyres are P. Are the LT a thicker ply?
> They were at 38PSI and I was travelling at 110km/h. Noticed that the
> backend of the vehicle was swaying a bit but put it down to
> the wind. A
> couple of minutes later I felt a large amount of vibration
> coming form
> the back of the car and by this time was slowing down and
> then the tyre
> blew.

[Jon Avid PP Poster! Find all posts View Profile Close Jon]

Cooper ATR tyres

Woould recommend the following (on all tyres)
Sand - 20 PSI
Unsealed roads - 30 PSI
Bitumen Road - 40 PSI

Use this as a starting point.

Have had Grandtreks as standard fitment, had 42 PSI on bitumen - very even wear.
Had 20 PSI on Fraser Island - went better than BFG A/T's!
Had a puncture when running 40 PSI on gravel (rocky) track(will not do this again!)
Stuck to the above formula when travelling Central Australia, including Simpson Desert - not one puncture on the five vehicles on the trip.
Now have Cooper ATR's - have done 75000km without a puncture and they still have at least another 10k on them.
I always have 42PSI in them for highway work (note I have OME suspension. Ride is firm, however the tyres do not wear on the outside edges. No probblems in the wet.
Note: advanced driving schools insist on 40 PSI before you can do the course.

[Rhetly Junior Member Find all posts View Profile Close Rhetly]

Thanks Craig

I actually read that message........all except for the bit that says what his PSI was (insert silly looking face here)

Cheers anyway, Rhet