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Tire rating ?

Discussion in 'Motorcycle Talk' started by Buz, May 25, 2007.


  1. Buz

    Buz
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    Are you ok with W rated tires @ 168 mph limit?
    What about Z rated for 149+?

    What tire do you feel safe on going 175 mph?
     
  2. Oly ZX

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  3. Diabolic

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    Z rated are 149+, not max, so I'm more than comfy at 175 on a Z rated tire. I don't think Z rated tires are necessary for most tracks (excessive straights being the caveat) but I run them anyway. I'm sure a W rated tire would work just fine on most bikes, particularly 600cc and lower class.

    I upgraded to 2CT's thinking they would be great. They are - on normal roads and occasional twisties. Not that great on the track (except in rain).

    Next tire I go with for the track is a Pilot Race or the new Corsas (both Z).
     
  4. Buz

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    Isn't the new corsa III W rated?
     
  5. Diabolic

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    Nope, Z rated. The size and model numbers make it a little confusing but here's a snapshot from the P website:

    [​IMG]

    120ZR front and 180-190ZR rear... not sure what the (73W) is for...:scratchea
     
  6. mjn

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    Great question Buz... One I've wondered myself.

    Why do the ratings read like that?

    149+???? up to....???

    I'll admit, the rating on the PP's that say "up to 168" don't do much for my confidence at speed... Not that I spend much time above that #, but it would be nice to know that they are safe at 175-180....
     
  7. eric

    eric
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    Slow Eric

    just an FYI, the rated speed is the maximum speed the tire can handle for ten sustained minutes
     
  8. mjn

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    Ok...so what speed can the Z rated tire handle for 10 minutes? 149+??? Plus what? 10? 20?

    The ratings make no sense to me...
     
  9. eric

    eric
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    Slow Eric

    Ok, wait a second. You all are crazy. The Pilot Power, Power 2ct, Corsa III and Qualifier are all ZR rated. 186+ mph. You guys are fine. I haven't gone past 80mph so I was never worried.
     
  10. GixxerPete

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    Tires are overrated.
     
  11. late apex

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    Couldn't agree more.
     
  12. mjn

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    ^^ hell with it...I agree. I think I'll just run on the rim..
     
  13. Diabolic

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    We'd have to be crazy to care about tire stability over a buck sixty :mrgreen: And nice catch Eric... I didn't even see the R behind the Z. 186+ hum? Hmm...
     
  14. mjn

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    oh brother.
     
  15. TruWrecks

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    Yes tires are overrated, but when you're flying low their very handy.

    The 73W is a weight rating.

    70W = 739 lbs
    72W = 783 lbs
    73W = 805 lbs
     
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