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96F air temps - Page 2

post #31 of 40
Thread Starter 


 

Quote:
Originally Posted by epic View Post




I'm not sure what that means. What type of flats did they have anyway? Pinchflats? Punctures? Bead popped off and giant slit in the tube? You sure those flats wouldn't have happened if it had been a cooler day. A tire guy told me that they get max psi by pumping the tire 'til it fails and then cutting that in half. I don't think you could ride in conditions warm enough to cause your tire to fail from a pressure increase.

 

what my comment meant was that a 220+ lb person on a 100psi 23mm tire better not run into anything with an edge on it, like a hole, curb, grating edge, pavement slot... no matter what the day temps are.   

 

(LOUD) Bead popping and tiny almost invisible holes, nowhere near the valve, is what the ones I know the nature of were.    The others : I have no idea.     Would they have happened anyway?   Maybe, maybe not.     Which tells us absolutely nothing about whether the temperature made them more likely (or not).

 

Is that tire testing method really relevant to any failure mechanism other than burst failure of the tire casing?      I agree, we are probably pretty safe in dismissing |burst failure of tire casings from ambient heat and consequent overpressure| as a likely failure mechanism, esp. since I saw no burst tire casings. 

 

I am not about to assume that the likelihood of other failure mechanisms is completely independent of temperature, though.


Edited by comprex - 7/30/10 at 3:37pm
post #32 of 40

Kevlar bead or wire bead tires? How old? Kevlar bead tires do stretch (that's why "ghetto tubeless" on the road is a very bad idea), and everything gets bigger when it's warmer. Maybe the beads were old and degraded and they slipped off the rim. That was the mode of failure in the overpressured tires, btw. I've never seen the test, just Interbike hearsay, but it was from a Vittoria product manager. I assume he'd know something about it.

post #33 of 40
Thread Starter 

The poppers?  Probably all Kevlar, couldn't say.   I remember seeing a newish Gatorskin and a red/black Hutchinson or Michelin something, completely off the rim.    The Gatorskin happened just as the guy came out of a downhill turn and started accelerating on the flat. 

 

(EDIT: Pretty spectacular catch, too, he was just coming to vertical and getting up out of the saddle when his rear tire blew, good thing he was using drops and not tri bars.)

post #34 of 40
Quote:
Originally Posted by Rossi Smash View Post





  


why be limited by equipment? Id rather be limited by myself and not by what I am riding. There are road decents where I have melted pads before and made them pretty much useless.

 

So I choose not to hammer down twisty decents, with disc brakes I could go as fast I i could go with out having to worry about pads melts, tubes/tubulars coming apart or a wheel expoling.

post #35 of 40

Wow, I'm impressed with you folk who have been riding with those temps.  I did my light day of the weekend today, 80 miles to Carter Lake and back, and when I finished it was about 90 degrees out.  I've done very little hot weather training this year, and the heat and humidity (yes, a very humid day in Colorado) got the best of me at mile 55.  I got a bit of heat stroke, and had to dial it back and limp home.  Not very pleasant.

 

Mike

post #36 of 40

I'm just hoping that my event days and long-ride training days are a little cooler than the typical days this summer. I'm doing 110 miles with plenty of climbing with a high of 88f & 70% humidity on Wed.

 

...And this is what has been normal this summer!


Edited by WILDCAT - 8/2/10 at 2:19pm
post #37 of 40
Thread Starter 
Quote:
Originally Posted by WILDCAT View Post

I'm just hoping that my event days and long-ride training days are a little cooler than the typical days this summer. I'm doing 110 miles with plenty of climbing with a high of 88f & 70% humidity on Wed.

 

...And this is what has been normal this summer!


So.   You up for HHH one of these years? 

 

post #38 of 40
Quote:
Originally Posted by comprex View Post




So.   You up for HHH one of these years? 

 


Horribly Hilly Hundred? ( been there, done that  ;-) )
 

post #39 of 40
Thread Starter 
post #40 of 40

That's supposed to be a hell of a ride.

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