Inner front tire wear

[356Guy]

I noticed both front tires are worn on the inside. I had an alignment last year 20km/12k miles ago. At that time the fronts were good and I was thinking I would have to replace the rears soon. Now they all need doing. Not a big deal but I'll obviously have to get the alignment done and ask more questions this time. The total mileage on these tires is 32km/20k miles. They are Bridgestone RE760 and the car is a daily driver and used mostly on the highway. I'm trying to find the alignment sheet but I'm wondering if they perhaps used std S specs instead of the ROW M030. Too much camber or toe in? M030 is supposed to have more negative camber? Would this explain the wear?

[BrantyB]

I think you'd need excessive camber to get that wear. To me, it looks like too much toe-out.

[maytag]

Originally Posted by BrantyB

I think you'd need excessive camber to get that wear. To me, it looks like too much toe-out.

I'm with brantyb on this. I dont think this is about camber, it's about too much toe- out.

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[steved0x]

Yeah i run -3 camber in front and zero toe and my insides don't wear like that. Looks like too much toe.

[Quadcammer]

Toe for sure

[356Guy]

Ok I'll have a discussion with the shop about this. I just wish I could find the alignment sheet they gave me. I'm wondering if it shows good numbers even though the alignment is obviously off.

[356Guy]

The shop (local Porsche indy) just basically blew me off. All the guys on the counter looked like their dog just died and there was a general lack of interest. I don't get mad about these things. I'll speak with my wallet and buy the tires and alignment services elsewhere.

[Starter986]

Originally Posted by 356Guy

The shop (local Porsche indy) just basically blew me off. All the guys on the counter looked like their dog just died and there was a general lack of interest. I don't get mad about these things. I'll speak with my wallet and buy the tires and alignment services elsewhere.

What's the name of the shop?

[Ratanui]

I know you requested a change in alignment but most tire shops will only do an alignment to stock specs. I would think that would be even more likely there in America where the threat of law suits is a real and present danger.

Most Porsche's are sports cars and run sports suspension/alignment settings. Our Boxster has the same wear pattern and depending on the type of tire fitted you can swap them on the rims so that the wear is on the outside to gain more life from the tire.

Our Ford Falcon utility also does this (4000cc six cylinder 195kw). We have a large number of performance sedans and utes here in New Zealand/Australia with aggressive setups that are hard on tires, a lot putting out 200kw-300kw+.

Most motorcycles have rounded tires that wear out in the middle because we ride them on the road not racetracks. Expect an average of 5000km/3000miles.

This isn't to say you shouldn't be able to request a custom set up to reduce tire wear but keep it in mind that in doing so you may be putting yourself in a grey area legally.

[Racer Boy]

I've gotten alignments lots of times that were non-standard specs here is the good ol' USA.

The OP's wear pattern looks like it could be excessive camber for the type of driving he's doing, although it could be toe-out as well. 356Guy, does the car feel "darty", like it wants to turn with just a slight input of the steering wheel? If that's the case, it may be a toe-out issue.

[356Guy]

Continuation now spring is here....I've got new Sumitomo's on order (good luck finding them around here....one set available in the Province)

Too much toe out might be the issue as I noticed that there is a difference in alignment specs between the NA and ROW Sport (M030?) suspensions. The ROW Sport requires more toe in and more camber. Perhaps the shop was unaware of this.