Uneven Tyre Wear

[dazed]

I've noticed that the rear tyres (Pirelli) on my IS250 are wearing unevenly. They're only about a year old and have covered about 15K miles, but are down to only 3mm in the centre whilst towards the edge I've got about 5mm+.

Have I got my pressure wrong (38psi) or is this just a sign that I shouldn't buy Pirellis again?

38psi is at the lower end of the recommended range (and supposedly suitable for driving below 100mph). I'm worried that if I increase the pressure the tyre will become more 'rounded' and cause the centre to wear even faster than it currently is.

The Toyos that I had previously wore very evenly and lasted 30K miles and were inflated to 38psi too.

Does anyone have any advice?

Thanks.

[Steve ( West Mids )]

Tyres are over-inflated, drop the pressure to 35 psi unless you are running with four-up and a boot full of luggage.

[allpag44]

Tyre wear in the centre is definately due to over inflation. As the last post suggests - drop the pressure slightly and you should notice a difference.

[dazed]

Tyres are over-inflated, drop the pressure to 35 psi unless you are running with four-up and a boot full of luggage.

Tyre wear in the centre is definately due to over inflation. As the last post suggests - drop the pressure slightly and you should notice a difference.

Thanks for the responses. I suspected that I should drop the pressure.

Just for the record, I spend most of my time cruising at 70mph with no luggage or passengers.

I'll drop the pressure to 35psi and keep an eye on things. Hopefully I'll get a little more life out of them by doing so.

[Exiled]

Thanks for this post, reminded me to check mine.

15,000 miles, Bridgestone Turanzas on 18 inch wheels. Inflated to 35 front and 38 rear as per handbook. 90% of mileage with passenger and no luggage. Wear is even across rear at 5mm and front at 6mm.