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Tires, tires, tires

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Comments

  • caswbcaswb Posts: 4
    Can someone please tell me what would cause this scratched/etched/pitted on 5 year old wheels with such low mileage?? Is that a flaw in the aluminum or just our regular road/weather conditions? Just curious. Thanks again. :blush:
  • blufz1blufz1 Posts: 2,045
    Discount tire will give you free lifetime rotation and will even air your tires up periodically for free. The tire mileage you got is normal for oem Michelins. Your wheels are probably ok. The pitting may be from salt used on some roadways in winter. It's just cosmetic. Hope this helps.
  • capriracercapriracer Somewhere in the USPosts: 793
    ".................Can someone please tell me what would cause this scratched/etched/pitted on 5 year old wheels with such low mileage?? Is that a flaw in the aluminum or just our regular road/weather conditions? Just curious. Thanks again................."

    Rims aren't designed to touch the road surface and if they do, the metal will be abraided.

    So if you operate a tire without inflation pressure, it is possible for the rim flange - the part that makes the rim larger in diameter than the hole in the tire - to come into contact with the road surface. Or worse!!!! - the tire could be dislodged from the rim and then the entire weight of the vehicle is now carried by the rim flange.

    You see, it is the inflation pressure that holds the tire out against the rim and without that pressure, it doesn't take much force to "debead" a tire.

    That's one reason why you should never operate a vehicle with a flat tire. Another is that vehicles don't behave predictably with an odd tire - and a flat would qualify as "odd". A different tire would, too!
  • paisanpaisan Posts: 21,181
    On a side note all this talk about "Don't operate your vehicle with a flat tire" IF you are in a spot where it would be dangerous to get out of your car, ride the rim to a safe place before changing it. I've heard way too many stories where someone got killed because they were changing a tire on a tiny shoulder on a busy expressway.

    -mike
    Motorsports and Tuning Host
  • imidazol97imidazol97 Crossroads of America: I70 & I75Posts: 18,073
    To reinforce the danger point:
    On I-75 there was a 2-mile strip of 2 lanes with concrete temp barriers on each side-no berm. A backup occured one afternoon and when I got through it there was a man in the right hand lane changing a rear tire on a smaller car which is light in the rear to begin with. Drive it to the end of the work area!
  • woodywwwoodyww Posts: 1,797
    Back in 2005 Repair Rim Seal was done on 3 of the 4 tires.

    All of this sounds fairly wierd. Why did 3 of your tires need Repair Rim Seal?

    Going to a "good" tire shop is a good idea. Of course "some" of them can be pretty aggressive in selling stuff, esp. with a customer who's not sure what they need.

    Costco is really good, & I think you get a free lifetime hazard warranty. But they may not really diagnose any problems. The installers should notice if there's anything wrong with your wheels tho.

    Finally, calling the tire rack for advice couldn't hurt. They may have cheap steel wheels in stock too, if you wanted that.

    BTW, how worn are the tires you have now? And how much air do you put in your tires? Are you sure your tire gauge is accurate? You can get a good gauge for $10 from amazon & learn to check them yourself.
  • :blush: imagei have a 95 mustang sharp just got it but it has some $$$ wheels on it there called KRONIX EKKO 990 they left the reciept in car with BFG G-FORCE rims & T/A KDW tires $3500 worth i need to go to MO are these worthy low profiles?? i got car for $1000 so it was a sweet deal can ya tell me if there highway safe?? :P :P
  • paisanpaisan Posts: 21,181
    Yes they are great tires, fine for the highway.

    -mike
    Motorsports and Tuning Host
  • dudette3dudette3 Posts: 39
    Thanks for the feedback.
    On closer inspection of my dad's Ford Focus, I found that the front left tire was installed at the wrong size -it should be P195/60/R15, the size installed is a P195/65/15. I think this happened when my dad took the vehicle into a Ford Dealer for repair work a couple months ago, after a bad weather induced accident.

    Is this something to be concerned about? Is the 60/65 a dimension of sidewall thickness? I called teh Ford dealer that did the repair work, but unfortunately they are out of businesses. I have noticed that driving the vehicle, it requires more attention to keep it going straight on certain highways, particularly at higher speeds. Also, I feel a sense of instability riding in the back seat (kind of like fishtailing, but not to that extreme) but am not sure if it is due to the left front tire being large, or the rear tires being ready to be replaced.

    Any suggestions will be helpful.

    Thank you.
  • paisanpaisan Posts: 21,181
    You should have the same size tires on all 4 wheels if possible and at the least the same size on each axle.

    The 60 is the ratio of the width to height. So if you have a 195 60 on one side and 195 65 on the other the side with the 65 will have a larger radius than the other side, not a real good thing for stability, tire wear and other reasons. I'd get another 195 65 or 195 60 to match the other side.

    -mike
  • micwebmicweb Posts: 1,617
    And tires that are mismatched in diameter, as these are, should DEFINITELY not be on the front, or drive axle, of your car since they will stress the differential. At a minimum, move that oddball tire to the rear.

    BTW, the new safety rule is that your WORST tires should be on your drive axle, not your best. This reverses decades of conventional wisdom, but Michelin ran extensive tests and found out that it's much easier to spin out when your best tires are on the drive axle (since you have front wheel drive, the drive axle is the front of the car).
  • paisanpaisan Posts: 21,181
    BTW, the new safety rule is that your WORST tires should be on your drive axle, not your best. This reverses decades of conventional wisdom, but Michelin ran extensive tests and found out that it's much easier to spin out when your best tires are on the drive axle (since you have front wheel drive, the drive axle is the front of the car).

    Interesting, do you have any links on this, I'd love to read up on it as I'm one to put the best tires in the front (steering and braking).

    -mike
  • kyfdxkyfdx Posts: 27,906
    Your best tires should always be on the rear, regardless of FWD or RWD... This is what gives you the best lateral grip, assuming acceleration isn't being applied....

    (in other words, around a curve at constant speed).

    regards,
    kyfdx

    MODERATOR
    Prices Paid, Lease Questions, SUVs

  • micwebmicweb Posts: 1,617
    Also Tire Rack, both of them have information about proper mounting when you only buy two new tires. Tire Rack might have a link to the Michelin study.

    What kyfdx makes sense, but I guess we'll all have to double check now.

    Since I always buy full sets of tires, in practice this issue has never come up for me.
  • paisanpaisan Posts: 21,181
    Ditto on that, I always buy 4 at a time.

    -mike
  • krzysskrzyss Posts: 843
    If dad's car has ABS it might be fooled by different circumferences.
    195/60R15 and 195/65R15 are close and if it was an emergency I would use it as replacement (like in the middle of the desert) and put it on rear (as Focus is FWD).
    60 or 65 is the sidewall height as the percentage of tire width.
    Check this
    tire rack knowledge base

    How many miles on old tires? Maybe it is time to replace all 4?

    Krzys

    PS Somehow I am not surprised the dealer is out of business.
  • mazda6iguymazda6iguy Posts: 365
    I happen to like the Goodyear TripleTreds I purchased for my Mazda 6 sedan. Not only are they great tires, but they look cool too!
  • blufz1blufz1 Posts: 2,045
    Did you notice a loss of mpg on the triples?
  • smokey75smokey75 Posts: 434
    I have the Tripletread Fortera's & have not noticed a loss of MPG. I came from Michelin Cross Terrain
  • blufz1blufz1 Posts: 2,045
    Thanks for the info. I replaced my oem Michelins w/ comfort treads and lost 1 mpg. Very smooth,comfortable,mid priced tire w/ 80k warranty, tho. Thanks again.
  • pathstar1pathstar1 Posts: 1,015
    I've posted it before but here it is again.

    If you slide the front of the car you will see what you may hit and can take appropriate action. You will still have some steering control.

    If you slide the rear of the car it usually means you will swap ends (spin). You WILL NOT see what you are about to hit. You will be unable to take avoidance action, as the car will be spinning.

    Hence, it is preferable to have the best tires on the rear, to keep it from sliding first.

    Also expressed as oversteer/understeer and loose/tight.
  • paisanpaisan Posts: 21,181
    Hmm, being a track driving instructor, I can see your point, however, your front wheels which control your steering and usually have more weight over them will essentially pull you through a skid with poor rear tires, whereas poor tires in the front steering, driving and weighted wheels can have you plow into things like guard rails.

    -mike
    Motorsports and Tuning Host
  • kyfdxkyfdx Posts: 27,906
    If you were drifting, on which wheels would you put the worn out tires?

    Good ones on the back.. The fact that the rear tires are being unloaded during braking argues for having better tires back there, so they don't break loose...

    (not an expert)

    MODERATOR
    Prices Paid, Lease Questions, SUVs

  • paisanpaisan Posts: 21,181
    Hmm, being a track driving instructor, I can see your point, however, your front wheels which control your steering and usually have more weight over them will essentially pull you through a skid with poor rear tires, whereas poor tires in the front steering, driving and weighted wheels can have you plow into things like guard rails.

    -mike
    Motorsports and Tuning Host
  • kyfdxkyfdx Posts: 27,906
    If you were drifting, on which wheels would you put the worn out tires?

    Good ones on the back.. The fact that the rear tires are being unloaded during braking argues for having better tires back there, so they don't break loose...

    (not an expert)

    MODERATOR
    Prices Paid, Lease Questions, SUVs

  • paisanpaisan Posts: 21,181
    However, to follow this up, since I mostly drive AWD cars, my tires are usually all evenly worn and I never mix and match sets. I also generally replace my tires at the 30k or 2 year mark regardless of how much tread is left on them as that's when they will start to lose traction. Everytime I think about keeping tires longer than their traction will allow, I say "is it really worth it for $500 to wreck my car? nope not really, and proceed to replace them"

    -mike
  • capriracercapriracer Somewhere in the USPosts: 793
    Paison,

    I have spent this week demonstrating this 5 times a day. In the demonstration, a car with 4 full tread tires does not spin out, and a car with full treads front and 75% worn tires on the rear does.

    I've put over 100 people through this (They drove!) and everyone was able to get Car #2 to spin, and no one could get Car #1 to do it.

    Put the new ones on the rear!!!
  • paisanpaisan Posts: 21,181
    Your example above doesn't make sense. Of course a car with 75% worn tires in the rear compared to a car with 4 full tread tires is more likely to spin.

    I'd be more inclined to go with your theory if you said you had put a car with 75% worn tires in the front and full tread in the rear v. the opposite.

    Also why on earth would someone have a car setup with 75% worn on one axle and 0% worn on the other axle? That is like saying "my engine blew up because I had 50% of the oil drained out of it".

    You are right though the car may spin, however, a car in the rain with bad tires on the steering and powering wheels will just plow right into the oncoming traffic lane. So while your theory of "spinning" may be correct, having a car plow into oncoming traffic isn't exactl safe either.

    -mike
  • mz6greyghostmz6greyghost Posts: 1,230
    My mother bought two new tires for her Taurus a bunch of years ago, and the shop placed them on the front of the car. After the first few instances (under rainy or snowy conditions) when she fish-tailed through intersections going about 5 MPH, she had the new tires moved to the back. The car never lost control after that. At all.
  • capriracercapriracer Somewhere in the USPosts: 793
    Paison,

    "........Also why on earth would someone have a car setup with 75% worn on one axle and 0% worn on the other axle?........"

    Because FWD cars wear the front tires much more rapidly than the rears. If they don't rotate, then they will want to change only one set - and since it is a FWD, they'll want them installed on the front.

    "...........So while your theory of "spinning" may be correct, having a car plow into oncoming traffic isn't exactly safe either......."

    Which would you rather have happen? Be going backwards where you have no chance of recovering - or - be going forwards where when the vehicle slows down you regain the steering and can steer around what might be in front of you.
    - and that just causes problems.
    It is
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