Tyre wear

[Riccardo]

I fitted a full set of Michelin Pilot Sport 2 to my 4S 6 years and 21k miles ago.

MOT today mentioned fronts are getting worn on the inside. Nothing re rears.

Is this normal? I thought that its normally 2x sets of rears for every set of fronts that wear out?

On a related note, will be replacing with Michelins again. Are PS2s as already fitted still a good choice, or better go for a more recent design, such as PS4 or PSS? Only use car in summer and on normal roads, no extreme driving.

 

[Robertb]

No, it's not normal. Though to be fair 6yrs and 21k miles isn't bad.

Have you had the geo properly done recently?

 

[Riccardo]

Thanks, seemed strange to me too.

I've had a geo done when I changed all 4 shock absorbers last year. And before that 5 yrs ago when I had the inner ball joints done. All work carried out by Northway in Reading.

 

[MaxA]

I'd get Michelin Pilot Sport 4S tyres - they really are excellent, and very good in the wet - and re-check the alignment.

 

[Alex]

If your fronts are getting worn on the inside then your geo is out.

2 sets of rears = 1 set fronts over same mileage as a rule of thumb.

 

[CB911C4S]

I just bought Michelin Pilot Sport 4S tyres and very happy so far.

Re alignment I went to Center Gravity. It might not be as local as Northway, but it's a good excuse to get out in the car and the interactive experience and attention to detail is definitely worth it. Plus there is a tyre shop, Mid Fit Tyres, just around the corner, and they work closely with Center Gravity. You could get it scheduled for the one visit.

I decided to refurb my wheels as I was changing tyres, so I used Chris at Exel Wheels to do the wheels and tyres - fantastic job. I have my next trip to Center Gravity later this month.

 

[Riccardo]

Again, thanks for feedback. In fact I do feel that the car hasn't been driving so well, might be explained by evidence of the geo being out.

I am booked into CoG on 13th Dec. Couldn't get in any sooner, I will be departing for a EU road trip on the 17th so by then the car will be on the winter tyres, which is a bit of a shame (CB911C4S don't fancy a time slot swap do you! ;-) )

When I refit summer tyres sounds like I should consider the Michelin PS4S, even if they're not N rated. I do tend to go for N-rated tyres, although annoyingly Porsche doesn't update their ratings so often.

 

[CB911C4S]

I wouldn't mind swapping the session but I have a full day booked with CG - front mounts, front and rear control arms and geo. I presume you have a half day session?

Did you ask for a cancellation slot? I got in earlier on my first visit because someone had cancelled - worth asking.

 

[Riccardo]

Thats very genereous even considering this, thanks.

I'm not 100% sure whether I have 0.5 or full day. I booked for Geo (0.5 day) but then also highlighted that I might need ARB bushes and rear control arms, so suppose it might turn out full day? I'll verify with Holly now.

 

[JonnieD]

Thanks, seemed strange to me too.

I've had a geo done when I changed all 4 shock absorbers last year. And before that 5 yrs ago when I had the inner ball joints done. All work carried out by Northway in Reading.

Do you know the settings they used for the geo last year?

I ask because on mine, I had a "fast road" geo done last year and for that they typically increase the camber on the front as much as possible (assuming a standard car / suspension). If yours has been done like this too, I would expect more wear on the inners at the front.