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Cutting The Guesswork From Tire Development

  • By Aaron Hersh
  • Published Jul 18, 2011
  • Updated May 3, 2012 at 11:42 AM UTC
The puncture test is run on both the sidewall (as pictured) and on the center of the tread.

Puncture resistance

How it’s tested

The puncture test is run on both the sidewall (as pictured) and on the center of the tread.

The second most important attribute of a tri race tire, in our opinion, is puncture protection. To measure a tire’s puncture resistance, Wheel Energy presses a small dowel into the tire with increasing force until it punches through and flats the tire, then records the force required to break through.

What matters?

Specialized was able to test the effectiveness of various types of puncture resistant layers to evaluate their effectiveness. These layers also tend to increase rolling resistance. Specialized found that tire casings with larger threads (low TPI) tend to be more puncture resistant than those built with thinner threads.

What changes?
The test for puncture protection reveals that tires with moderate TPI count are resilient to flats. The rolling resistance test shows that tires with such casing also have low coefficients of rolling resistance. The results of Specialized’s tests reveal that this style of tire, not a tire with ultra-high TPI, is best suited to the specific needs of triathletes.

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FILED UNDER: Gear & Tech / Triathlete Buyer's Guide TAGS: /

Aaron Hersh

Aaron Hersh

Aaron Hersh is the Senior Tech Editor of Triathlete magazine. To submit a question, write Aaron at Ahersh@competitorgroup.com.

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