I just bought a pair of close out Goodyear F1's for my 19" wheels. They are for future installation and were a deal at $540 for all 4. I'm still at about 60% on front, but noticed today that I'm down to about 25% on the back tires already. So, my question is: Do the rears wear out about twice as fast? And, does this mean I should look at buying two more rear tires so I'll still be running the same on all 4 when I switch the back while the fronts are still at 50%? Any advice is most appreciated. Thanks.

Yup -- rears wear at about 2x the front. If you're lucky, you'll be able to go through 2 sets of rears for every set of the fronts. Sounds like it would be good if you can get another set of the same tires for the rears. If you have an AWD 911, you do want to make sure that the fronts aren't too worn for a new set of rears (different diameters between fronts and rears).

clearance tires are often sold because they're 'old' rubber that has a finite shelf life which is about to expire. I was told this by someone in the industry (i.e. worked at tire rack which was the same place offering the deal) who said that it meant that you'd typically get less wear out of these tires than the fresher sets that weren't on discount. I only knew to ask about it because I noticed that the same set of tires appeared to be available at two different price points. Tires are stamped with a sort of born on date.

also, is your car lowered? I've been reading about how lowering it can cause out of spec toe conditions which may cause excessive tire wear. Seems there are adjustable links out there to fix this because the factory adjustment isn't sufficient to pull it back into specification.

Tyres have expiration dates. Even if they are lightly used the should be replaced every 2 years

Thanks Guys, yes these are clearance for date reasons. They were born in Feb of 2008. But, no sun wear and the rubber looks very good. I'm thinking for 50% and the type of driving I do (no track) they'll be good. Oh, forgot to mention....probably closer to 60% off after I get the $80 good year rebate. Could not pass it up and hope they work well for me. I do believe you get what you pay for, but again...with my driving I'm sure I will not push them too much.

As to lowering. Exactly right. my lowered car wore out the inside edges in 4 k mi. Adjustable toe steer kit, RSS/Stuggart Performance, Costa Mesa, CA, fixed it.

JB

My wear is 3:1 rear:front.

I agree. But 2 years seems a bit short. I've read that tires are probably good for about 5 years from the date of manufacture.

Michelin says 10 years on their website IIRC. That's too old in my opinion, but 5-7 yrs for street use should be fine for a good tire.

Agree. I'd say 5yrs or so from date of manu.

When I bought my 2001 is was VERY low...tool low. I raised it up by 1" all the way around. That is till about 1.5" below stock I think / by comparing with my friends stock 04 Anyway, with these Bilstein PSS9's they are riding much better and not hitting bump stops on bigger "bumps". Porsche in Salt Lake raised it and aligned it. All seems to be riding very nicely. So, next time I buy tires I'm buying 6 as these rears wear quickly. Hey, how often do you guys have your tires balanced out? And, when you do new mountings, do you have them road force the rims first, then fit the tires on after to make sure you get the best weight and round? Thanks for the advice. Chris

I have the same set up. Once I lowered the car, the rear tires started to wear on the inside edges; it was due to inability to get the toe-in correct. THat was fixed by adjustable rear toe-in camber arms (Thanks to RSS/Stuggart Performance).

I measure tire pressure the first weekend of each month and inspect the tires every 3 months for uneven wear. Over the 3 yrs I have owned the C4S, a 4 wheel alignment is done every year, in the spring.

Yes, rear tires wear fast on these things.

JB

I have a friend who kept his daily drive Toyota six year without replacing tyres. I wouldn't keep them for more than 3 years