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Tire & Wheel Forum sponsored by The Tire Rack |
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03-20-2021, 10:28 AM | #26 | |||
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Understand that as you drive, wheel camber varies from what the alignment shop sets it to (and toe varies slightly as a consequence of that). Front and rear suspensions don't vary camber with ride height at the same rates (called 'camber gain' if you're into vehicle dynamics). This affects wear rates across the tread, which depends on both your alignment shop's settings and your individual driving. Subaru only has loose control over your car's alignment (the acceptable range of camber settings is fairly loose), and neither Subaru nor I have any control over your driving. Is there much hard cornering in your driving? Much hard braking? None of either and mostly highway driving? The wear patterns are different for all three. Optimize tread wear for one of those at some risk of hurting the other two. Quote:
That aside, you're always going to be better off heading off the development of adverse wear patterns by rotating earlier before any uneven wear has as good of a chance of getting started. Quote:
Norm
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03-20-2021, 01:34 PM | #27 | ||||
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03-20-2021, 04:08 PM | #28 | |||
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For street duty only, I can count on getting 10,000 miles per hundred treadwear, various cars, various tires. But sometimes I get 12,500 miles per hundred, and I once got over 20,000/100 (though a lot of those miles were my wife's). IOW, there's a lot of variation. You should probably understand that I don't take corners "gently" unless forced to do so by other traffic . . . not exactly consistent with the idea of getting long tire tread life. Unless there's something abusive in your driving (such as lots of hard braking from moderate or higher speed, or you have an early-morning newspaper delivery route) you should expect to do better. Quote:
Norm Last edited by Norm Peterson; 03-20-2021 at 04:13 PM. |
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03-23-2021, 11:46 AM | #29 | |||
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A reference to a URL was made somewhere earlier in this discussion and at that site, it says for Subaru, the maximum delta should be 2/32". Safety margins are always built in, so I would imagine if 2/32" is what they publish, it is OK to go up to 3/32".
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And in a 40,000 scenario, how does it help if each tire is on each corner for two separate 5,000 intervals rather than one single 10,000 interval? Same question for a 20k scenario and two separate 2.5k intervals vs. a single 5k interval? |
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03-23-2021, 04:17 PM | #30 |
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Golconda - add to your assumptions that tires wear differently at each end of the car, not only at different rate.
Fronts are steering in most of the cars, rears are not. That puts different stresses on tires and different wear. Tire rotations try to even out the wear rate and wear pattern. Rotating tires each 50 miles will get you very even wear at the cost of time and money. 5000 is not bad numbers. I rotate tires when I do seasonal switchover. Krzy***347; |
03-23-2021, 06:42 PM | #31 | |||||
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What I don't understand is why you'd choose to permit wear that's more uneven rather than less so. Quote:
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Like him, I include tire rotation with my WRX's seasonal tire swapping. That would take 8 seasonal swaps (4 years) to allow every tire to have taken its place on every corner of the car. No guarantee they'd be worn out, or even close to it. You seem to like playing with rotation schedule numbers, so my WRX is sitting at about 18,000 miles and the weather is starting to tell me that it's time for the summer/3-season tires to go back on. It'll be the 4th time tires have been pulled off and others put on. That works out to an average rotation interval of ~4500 miles, so I guess I haven't been all that far off of Subaru's schedule after all. Norm Last edited by Norm Peterson; 03-23-2021 at 06:48 PM. |
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03-25-2021, 12:21 PM | #32 | |
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03-25-2021, 12:38 PM | #33 | |||
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Without a good answer to this question, I see no point in doing more than 3 rotations in the life of the tires (assuming reversible tires) 40,000 scenario, how does it help if each tire is on each corner for two separate 5,000 intervals rather than one single 10,000 interval? Same question for a 20k scenario and two separate 2.5k intervals vs. a single 5k interval? Quote:
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03-25-2021, 02:07 PM | #34 |
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you asked a question, then have proceeded to tell us every imaginable reason under the sun why you dont think any of the answers given are applicable to you. i would suggest it is your car, your tires do whatever floats your boat with them.
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03-25-2021, 02:34 PM | #35 |
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^That.
The time wasted in this thread could've been spent just rotating the damn tires, therefore I will not be wasting further time on this thread as I will be rotating my own tires. |
03-25-2021, 03:34 PM | #36 |
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I have yet to see any good reasons in here as to why one should rotate their tires every 5,000 miles instead of at the 1/4 point in the life of the tires. The 1/4 point in the life of the tires will allow for even wear over the life, while every 5,000 only works if the tires last for 20k or 40k.
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03-25-2021, 05:48 PM | #37 | |
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03-25-2021, 06:05 PM | #38 |
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Because your 1/4 estimate may be wrong so why not do this at 5000 miles?
It sounds like that you should start thinking about rotating tires at 5000 miles and you will get to it at a little later time, which is OK because the idea is to rotate the tires. Krzy***347; |
03-25-2021, 06:29 PM | #39 | |
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Keep in mind that differences in tire revs/mile make the center diff work harder . . . all of the time. Compared to a center diff repair job, a few "extra" tire rotations is cheap money spent. Less down time, too. Not to mention that tire rotations can (to some extent) be done at your convenience. Too bad center diff work isn't as considerate. I'm not trying to say that center diff repair is a guaranteed consequence of allowing greater amounts of tread depth wear, but it is at least a consideration that you should keep in mind. Norm |
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03-26-2021, 01:32 AM | #40 |
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My grasp of the english language isn't so great so forgive me but doesn't this boil down to the quagmire of avoiding having lower tread depth in the rear for hydroplaning safety purposes? The longer you extend the tire rotation interval, the more the fronts will be worn, which will then be rotated to the rear, and have an oversteering situation if the car hydroplanes? So if you rotate more frequently, it essentially eliminates that split-second false sense of security when your front tires maintain control but then your rear tires give up right after that.
The above was my #1 reason for rotating more frequently. #2 was to avoid wearing out the center diff. And I hate the fact that tire shaving shops are few and far in between. You blow 1 tire going into 15K miles and now you're out of luck and may need a new full set. |
03-26-2021, 09:12 AM | #41 | |
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What I've been getting at is more about not letting any uneven wear patterns progress as far as extending the recommended tire rotation interval would allow them to. Norm |
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03-26-2021, 09:24 AM | #42 |
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Just to be upfront, I set my reminders at 5K miles but I probably don't change them until closer 5500 to 6K.
Don't want to digress from the topic here but checking for uneven wear should be done every so often inbetween rotations. In the last 2 decades, I've had to get 2 new sets of tires prematurely because of a bad alignment |
03-26-2021, 10:17 AM | #43 |
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Been following this a little and I really don't get why this has become a rather heated topic. Even if you don't do your own oil changes, many places do free rotations when you get an oil change. Given the recommended oil change interval, why not just do the rotation with every oil change? Takes me an extra 30 min tops to rotate my tires in my driveway when I change my oil. Takes 10 min at a shop with a lift. The whole topic seems a bit moot. if you care about extending the life of your tires you just simply keep up with the alignment and rotate regularly.
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03-27-2021, 10:52 AM | #44 |
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Do I really need to change my oil that often ? The book says 7500 but I figured they are just cya And I’m too busy and I use good oil from Wally World
Do I really need to get gas when the light comes on ? I mean I should be able to go another ten or fifteen miles before I run out . If I think about how much that adds up to I could probably save five minutes every 4K Miles . Besides that sometimes when I pull into the gas station I have to wait for someone else to finish filling up Do I really need to brush my teeth twice a day ? I don’t have the time and I figured if George Washington was able to get wooden teeth I wouldn’t really have to worry if mine fell out Do I really need to wipe my butt after I poop , I go to a nice store and buy top of the line nut huggers so they should help clean up the mess and I can always just buy more , besides I can save a tree with the tp I don’t use and on top of it all think of time that could be saved , 2 dumps a day across a lifetime at 30 seconds a wipe , and sometimes when I sit on the can I have to wait a couple minutes anyways. Then again sometimes I have to wait it line at the cashier to buy said nut huggers I’m looking for feedback so I can argue every point please , and please try to keep replies to anything that has no common sense because I don’t have the time to post here and read pages of text when I could be doing something more productive like maybe getting the tires rotated on my car Tia Last edited by motorbykemike; 03-27-2021 at 11:12 AM. |
03-31-2021, 11:07 AM | #45 |
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03-31-2021, 11:10 AM | #46 | |
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03-31-2021, 11:12 AM | #47 | |
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03-31-2021, 11:14 AM | #48 | |
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03-31-2021, 01:24 PM | #49 | ||
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You're way too focused on trying to balance a single aspect of tire wear when there are several different effects at play. Most of which have been mentioned or at least hinted at more than once. But it's been about as fruitful as talking to the proverbial post. I'm out of here . . . Norm |
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03-31-2021, 03:42 PM | #50 |
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