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New Tires on Front vs Rear revisited?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by briank101, Jan 3, 2014.

  1. briank101

    briank101 Member

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    While conventional wisdom is that new tires should be put on the rear, because understeer is easier to control than oversteer for most drivers, my contention is that this may have been the case in the pre-electronic stability control era. In vehicles such as the Prius Gen III with VSC, the front wheels provide the majority contribution to traction and in an impending fishtailing or oversteer situation, where the VSC engages, the selective corrective braking on the left or right front wheels will have a far more dominant and effective correction of an oversteer or spin out incident if the front wheels have the better (new) tires compared with the rear wheel having the better tires. I think there is some research from Mercedes that is lending support to this idea.

    If this is indeed the case teamed with the other advantages of having improved traction on the front, i.e. shorter stopping distances, better wet and snow traction when accelerating, does the old argument about new tires on the rear start to have less merit?
     
  2. Air_Boss

    Air_Boss Senior Member

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    The problem with four good tires is?
     
  3. danvee

    danvee Blizzard Brigadier

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    ... that some people may not be able to afford 4 new ones at one time?
    ... that you might have 1 tire which is damaged beyond repair and mileage is such that it's prudent to replace both on the same axle?
     
  4. Air_Boss

    Air_Boss Senior Member

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    I can see the failure scenario but if you are rotating tires you will have relatively even wear. Other than that, tires are a consumable and like maintenance, are a budget item. The Prius investment is far more than the budgeted and actual maintenance, or at least let's hope so.
     
  5. briank101

    briank101 Member

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    Exactly I just paid $300 today for 2 front tires, I wasn't going to throw away the rears that had 20,000 plus miles left. All articles on the web I searched about new tires on the rear do not make mention of VSC.
     
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  6. fuzzy1

    fuzzy1 Senior Member

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    Facing a repair-or-replace decision on the household's old Subaru, last month I replaced it with a new 2014 Forester. A few days later, still on factory tires and visiting family inland in a different climate zone, I tried to test its new VSC on a slick city street.

    The result was an extremely convincing demonstration that VSC is no substitute for good traction. While it may do wonders with the available traction, it can't create additional traction out of thin air.

    The factory tires are now in my shed, waiting for Spring. The Forester is now wearing true winter tires.
     
  7. car compulsive

    car compulsive Active Member

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    I was in our local Discount Tire getting a set of winter tires for my wife's new Fit when I overheard the counter guy arguing with a commercial customer that if he only bought 2 tires for his full-size domestic van, they would have to be installed in the rear. The customer insisted he wanted them on the front and all the counter guy could muster was "It's a safety thing" as to why the tires had to go on the rear. The customer left to find another store that would do what he wanted. In talking to the counter guy later, it was obvious that he didn't know why "It's a safety thing" and he didn't really grasp my explanation. Their sales folks need more training.
     
  8. Air_Boss

    Air_Boss Senior Member

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    How is it you had such uneven wear front/rear?
     
  9. danvee

    danvee Blizzard Brigadier

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    In my case it wasn't uneven wear, it was an unrepairable screw puncture.
    Better to replace the 2 on that axle than have one with 30k and one with 0 miles.
    Couldn't justify another $300 to replace the 2 other tires with about 20k of life (2 years) left on them - although I would have liked to.
     
  10. wjtracy

    wjtracy Senior Member

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    The are some lengthy prior threads on the subject. There is some difference of opinion, but reading all of that, I put my 2 new tires on front. On the rear I have Goodyear ComforTed heading past 80000 miles. Soon I will repalce all 4, as the Conti on front do not last as long.
     
  11. briank101

    briank101 Member

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    Because I never rotate my tires, so the front wears about twice as fast as the rear. I don't rotate because of the $200 and the time spent waiting on rotating the tires is not worth it in my opinion. That said the wear was very even across each tire and I insisted on an alignment before I bought the car used about a year ago. I'd rather put the money saved into replacing the tires slightly sooner.
     
  12. briank101

    briank101 Member

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    I looking for a discussion that brings VSC into the discussion about new tires on rear vs front.
     
  13. bisco

    bisco cookie crumbler

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    wouldn't a commercial van with rear wheel drive get the new tyres on the front?
     
  14. Air_Boss

    Air_Boss Senior Member

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    A false economy, IMHO, but to each their own.
     
  15. Air_Boss

    Air_Boss Senior Member

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    Why ignore ABS?
     
  16. briank101

    briank101 Member

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    Well if there's too little traction (ice), the new tires on the rear you're probably screwed anyways. I think with the combination of VSC with the higher traction tires on the front, one has the best overall combination of control. All demonstrations of this topic on video are older cars without VSC (ESC) to prove the theory on conventional cars which I have no argument with. It's the VSC cars I'd like to see demo'd.
     
  17. The Electric Me

    The Electric Me Go Speed Go!

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    Revisit this debate if you want.
    But I don't think VSC changes anything. It's just a separate safety tool available on most vehicles.

    99.9% of Tire Dealers and Manufacturers recommend if replacing two tires, placing them on the rear. I've seen the videos of test track comparisons, I've read the reasoning, I'm going with it.
     
  18. Air_Boss

    Air_Boss Senior Member

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    Forced to choose, I'd take oversteer, any day.
     
  19. fuzzy1

    fuzzy1 Senior Member

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    I agree on this. That is why I do it myself, in much less time at no charge. It saves more than enough money to buy four new tires at once, rather than just two, and avoid the entire issue of two weak tires and asymmetric traction.
    When there is too little traction, I'm screwed. Period.
    I'll admit that my reflexes are trained for non-VSC vehicles with symmetric traction. But I don't believe VSC contains sufficient magic to allow cheapening out on adequate tires.
     
  20. IanIanIanIan

    IanIanIanIan Member

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    For 40 years I have been told that the best tyres should be on the front because that is where most of the braking is, as the car brakes the weight is thrown forward and improves braking, grip and steerage.

    The last three or four years that advice has reversed with the reason given that it evens out the breaking, enhancing the poor rear braking performance.

    I was once told that singing my hair instead of cutting it improved its strength as it stopped the cut ends from 'bleeding'. When I pointed out that I shaved every day and that did not seem to weaken the hair the barber replied,
    "Well I suspect you were not the sort of person for which that story was made up to be told".
     
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