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YOUR RESEARCHhow long SHOULD tires last on our cars?
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weight of the motor sitting
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It was due to the weight of the motor sitting on the rear tires.
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Suggestion · Original poster
this weekend and I'm sure I will use up some rubber but maybe thinking I should have my alignment checked before which might save a little more rubber.
Leading evidence: 'weight of the motor sitting' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'weight of the motor sitting' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check before' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Use arbormotion in ann arbor, extremely trustworthy
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I use Arbormotion in Ann Arbor, extremely trustworthy.
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Below, is probably the best place to start with the new tires.
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Suggestion · Original poster
this weekend and I'm sure I will use up some rubber but maybe thinking I should have my alignment checked before which might save a little more rubber.
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Suggestion · Original poster
I just don't trust these shops anymore, anyone in Michigan have a shop to recommend for alignments that wont rip it up as soon as they get out of view?
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Suggestion · Original poster
this weekend and I'm sure I will use up some rubber but maybe thinking I should have my alignment checked before which might save a little more rubber.
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Suggestion · Original poster
I just don't trust these shops anymore, anyone in Michigan have a shop to recommend for alignments that wont rip it up as soon as they get out of view?
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Suggestion
If you want to maximize tire life, get the rear camber as close to 0 as possible (realistically, that mean's like -1.5-2 degrees on these cars) and then have them set the toe close to zero, but not exactly zero.
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Prompting me to ask is how fast I went through my rear tires last summer and I have brand new one on there now.
Couple years ago with my boxster I went through a set(rear) every summer. last year with the 911 I went through a set(rear) in 1 summer as well. Yes I drive with a heavy foot... pretty sure I read somewhere that it was a rule for driving our awesome cars. But I don't put a lot of miles on it. maybe 2000 for a summer.
Is this normal? should I be getting more life out of my rear tires even if I'm driving with a heavy foot? The alignment printout I had done last year had everything within .02 (not sure what that means) but I've also read some threads about how much a bad alignment(even a little bad) can really wreak havoc on our tires.
Heading to the track in Belding mi. this weekend and I'm sure I will use up some rubber but maybe thinking I should have my alignment checked before which might save a little more rubber.
Thanks guys.
You went through a set of tires in 2000 mi.? Uh, yeah - that's not normal. What kind of tires? I hope those aren't the one's you're taking to the track - if they wear out that quickly on the road, they might be dangerous on the track...
I have new toyo proxes on there now. they have about 150 miles on them as of Saturday. I have time to take the car in and get the alignment checked. So even if I'm getting on it I shouldn't be going through the tires that fast? I went through the boxster tires that fast as well and I had an alignment done on that as well. I just figured this is Porsche cars.. I'm only new to porsches for the last 4 years and I'll be the first to admit I'm no guru with these cars yet.
It was aligned last summer for sport driving so my camber is quite aggressive.
First reply and now I'm scared lol.... thinks man lol
What's the treadwear number on the tires. The lower the number, the faster they will wear.
Are they wearing evenly? If not - you've got an alignment/ inflation issue.
On both cars they wore more toward the inner of the car evenly. I'm guessing the camber is to much, I guess I just assumed the aggressive alignment wouldn't be an issue ?
More aggressive negative camber will always make the tires wear unevenly (the inner edges first). There is no specific # of miles that you "should get" from any tire - there are too many variables including but not limited to tire compound and driving style. Regardless of these variables, unless your tires aren't made of Gummi Bears, you should get more than 2k out of them
... mm maybe a little to be honest ... i might kick it sideways once a week but for the most part its taking the turns aggressively on the way home from work and the get up and go from the stop signs. i never drop the clutch, did that in the boxster and ripped out all of my axle bolts so i only get on it after its rolling.
either way it sounds like i should get it looked at ???
fair enough, i will take it in.
last time i had the alignment done last summer i didn't let them drive it down the road. I heard the kid.. ya kid say to the guy in the front "dude i'v never driven one of these i cant wait" so i told them no driving. don't need broken axles from
I just don't trust these shops anymore, anyone in Michigan have a shop to recommend for alignments that wont rip it up as soon as they get out of view?
Too much negative camber. "Aggressive" alignment if you using the car primarily on the track. Even then, tire temps and wear should be monitored after each session.
Do you know the treadwear number? I'm going to guess 140 or less.
I have michelin ps somethings that r the porsche n-spec and i should get about 5k on them. I have the camber set at 2.5* all the way around which is agresive and matches my driving style. Ill wear out the insides but im happy w8th jow they perform.
It's on the sidewall. Part of the UTQG rating system. According to Tire Rack, those tires carry a 280 treadwear number. They should last a lot longer than what you are getting. It seems clear your aggressive alignment is using them up.
mine is cambered aggressively on all four as well.
yup, I'll take it in and have it looked at. everything is new under there so I would think this can be fixed with just getting it tweaked in.
Aggressive camber and toe = tire wear. I have a M030 suspension and had to back down on the settings to get tires to last more than 8k miles. Had the alignment shop set to the least aggressive settings recommended by Porsche. Tires are holding up a lot better now. If you want tires to last you have to give up a little on the performance side.
I'm searching right now for the highest rated alignment shop near me. I know there are a couple highly rated shops closer to Detroit that work on porsches .. we will see.
... the fat tires look good though lolol
Hey guys one last quick question. so does anyone have any numbers I should tell the shop I'd like them to align to for the best happy medium between aggressive and saving me some tires?
These forums are such a life saver for the back yard mechanics like I try to be. Big thanks to everyone
Try the OE specs. Compare these numbers against your previous "aggressive" numbers.
You can see these camber numbers are very small. Probably where you will see the biggest difference and significant improvement in tread life. If you can take good photos of the tread of each (old) tire - and identify its location (RF, LR, etc.) I should be able to offer directional recommendations. Below, is probably the best place to start with the new tires.
Excessive negative camber isn't helpful for tire life, but the real killer is toe.
If you want to maximize tire life, get the rear camber as close to 0 as possible (realistically, that mean's like -1.5-2 degrees on these cars) and then have them set the toe close to zero, but not exactly zero. You want a little bit of toe (like .1 degree) or the car will be fidgety.
It's been awhile, but if I recall correctly, I preferred the way my 996s drove with the front toe at -.1 degree and the rear with +.1 degree in the rear.
If you have stock control arms still and your car is lowered, you will likely have to make a trade off between extra camber to get the toe where you want it because there isn't enough adjustability to have both where you want them. In this case, focus on getting the toe dialed in, and get the camber "close enough".
When I had it done last year the guy� Kid told me the specs on his computer showed that the toe had to be something like 1.5 in or out (don�t remember) because the spec sheet was telling him that under load the tires will push out for the rear tires. I�m not saying that with any type of certainty just trying to remember what he had told me. I tried looking for the alignment results sheet today when I got home from work but I can�t find it. I remember my Boxster was very Squirrley with any amount of water on the road even if it was just misting and after I had the alignment was much better and the tech said that one tire had bad toe on it. The 911 isn�t Squirrley though. Stock control arms but elephant racing �sport� bushings and eps trailing arms, oh and power flex sway bar bushings.
Using my phone to reply to this sorry about the grammar Lol
i went through 2 rear sets for every front set. My car had zero alignment issues in the rear, and only minor issues in the front. It was due to the weight of the motor sitting on the rear tires. I did not have a heavy foot and the tread wear rating was very high
your experience seems normal if you have a heavy foot.
I drive around town like Miss Daisy and get about 6000 miles out of a pair of rears (Falken FK453 and Michelin Pilot Super Sport). Yup and at least two sets of rears to a pair of fronts.
I agree, I said I cant blame the kid, not that you should let him try his driving skills out. I can safely say a teenager will drive it like they rented it. (Rented it is better than stole it because if you steal the car you would try and drive as normally as possible to not get caught, but if you rent it, the damages are someone else's problem)
