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Tire rating ?

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

  1. 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

    Oly ZX Daytime Adventure Seeker


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

    mjn Forum Admin Staff Member

    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 Slow Eric

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

    mjn Forum Admin Staff Member

    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 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

    GixxerPete Forum Synopsizer

    Tires are overrated.
     
  11. Couldn't agree more.
     
  12. mjn

    mjn Forum Admin Staff Member

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

    mjn Forum Admin Staff Member


    oh brother.
     
  15. 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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