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Thread: mixing tires

              
  1. #1
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    mixing tires

    i remember someone talking about not mixing tires. what can you not mix?

    I have nitto 555 on the front and 555R on the rear (Drag Radials), but realize that DR's may not be suitable for DD driving/longer trips.

    I am contemplating getting some R888's for the rear. is this dangerous? if so, what other options do I have?

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    It's dangerous to mix bias-ply and radial tires due to vastly different handling characteristics.

    It's generally safe but not optimal to mix different radial tires. It could result in unpredictable handling if you had sticky tires on one axle and harder tires on another, particularly if the hard tires are on the rear.

    Since the R888's should be stickier than the NT555's, you'll probably see more tendency to understeer, but for street driving shouldn't be unsafe.

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    You can mix tires, unless you're pushing the car and actually breaking the tires loose it doesn't really matter.

    Now you should never Daily on a DR or a slick, We just had a friend total his car driving down the freeway at 70 mph in the rain on the way to an event with other people around him that knew him, he had 555Rs on the rear, Car hydroplaned and ended up in the median/catch fence.




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    Actually, yeah, that's a good point. Running R compound tires in the cold and wet is generally a bad idea, even with rain grooves like the R888.

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    Click here to enlarge Originally Posted by andrew20195 Click here to enlarge
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    It's dangerous to mix bias-ply and radial tires
    expand on this please
    Click here to enlarge Originally Posted by E90SoFlo Click here to enlarge
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    Now you should never Daily on a DR or a slick,
    you can if your aware of what you have
    Click here to enlarge Originally Posted by andrew20195 Click here to enlarge
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    Running R compound tires in the cold and wet is generally a bad idea, even with rain grooves like the R888
    the car will not see rain as its a weekend car, but the life of the DR's is what im trying lengthen. it may see the cold, but its going to be for competition purposes anyway, and thats the need for a very sticky tire in the rear

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    Click here to enlarge Originally Posted by andrew20195 Click here to enlarge
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    It's dangerous to mix bias-ply and radial tires due to vastly different handling characteristics.
    This. No bias-ply and radial.

    You can mix radials just be aware of the compounds. For a straight line, you really won't have trouble it's only when you are in turns for the most part.

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    You should be ok with the nitto drs in the rear. As long as you dont go burnout crazy you can get around 15,000 miles on the nittos. Ive driven mickey thompson et drag radials with skinnies up front in the supercharged 408 stroker LS motor in my trans am that traps close to 140 mph in the quarter and have driven 30 miles in rain. That was scary...
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    Click here to enlarge Originally Posted by DQE92 Click here to enlarge
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    You should be ok with the nitto drs in the rear. As long as you dont go burnout crazy you can get around 15,000 miles on the nittos. Ive driven mickey thompson et drag radials with skinnies up front in the supercharged 408 stroker LS motor in my trans am that traps close to 140 mph in the quarter and have driven 30 miles in rain. That was scary...
    Its not so much the safety of driving on DRs, im ok with that except i want to save them. They handle rather well actually. i was curious about mixing the other ones

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    you can't have different tires on the same axle but they con be different on diff axles

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    Click here to enlarge Originally Posted by blkclk550 Click here to enlarge
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    you can't have different tires on the same axle but they con be different on diff axles
    If they are the same compound. Not with bias-ply and radial, this is a no-no.

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    Bias ply tires are much more flexible than radial tires, both in the sidewall and in the tread. This is why true drag slicks still use bias ply construction. You want them to flex and dig in on the launch.
    They tend to have much less grip when turning, and less predictable at the limit handling characteristics than radial tires. So if you ran radial tires in the front with bias ply in the rear, in a turn, the front tires would tend to bite, while the rear would flex, up until the point they lost traction, resulting in unpredictable snap oversteer.

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