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Challenge Criterium 320 Tire - Tubular

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Item # CNG0014

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  • Black/Black, 700c x 22mm ($70.99)
  • Black/Black, 700c x 23mm ($70.99)
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Item # CNG0014

Silk at its finest.

Challenges racing tubulars are still made by hand, one at a time. The backstory on Challenge is that it's the recreation of the old Clement tire brand. Clement was moved out of Italy to Thailand by its parent company, Pirelli, and abandoned. The people who imported the tires in Italy, and the people who ran the factory in Thailand, then got together to provide the legendary Clement quality in a modern package. The Challenge Criterium 320 Tubular stands at the top of its current collection, providing the same quality and precision that's made it the preferred choice of professional cyclists year after year.

Challenge makes its silk casings using the same machines and labor-intensive processes perfected by Clement. The silk casing is still the preferred tubular material, as it's finer and more supple than either cotton or polyester. It could almost be considered 900 threads per inch (TPI), but the casing is constructed differently, which means that the count isn't quite accurate. A fine silk casing is the best option for road racing because it means more of the tread contacts the ground, providing the best traction and 'feel' of the road surface.

After the casing is made, Challenge glues on a belt of corespun polyester casing to the area where the tread goes. This second layer is what Challenge calls its PPS (Puncture Protection System), and it's specifically made from the tightly woven polyester material in order to preserve the casing's overall supple feel.

On top of that second ply is the hand-glued signature Criterium tread. This proven tread pattern provides both low rolling-resistance and incredible grip. Longitudinal ribs run down the center, with a herringbone structure on either side. And sticking with traditional methods, Challenge glues this legendary tread pattern by hand to the casing after the casing has been tensioned. The logic behind this is that a tread made separate from the casing rides better and with less rolling-resistance because it doesn't get deformed by the inflation of the tire.

The Challenge Criterium 320 Tubular measures 700c x 23mm and is available in the colors Black/black and Black/tan. Each tubular weighs in around 260grams. Please note that Challenge gave this tire a latex inner tube to save as much weight and roll as fast as possible. Because latex is more porous than butyl rubber, you'll have to pump up a bit before your rides.

Tech Specs

700 c x 23 mm
silk, PPS flat protection
100 - 175 PSI
Claimed Weight:
260 g
Recommended Use:
road cycling
Manufacturer Warranty:

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Here's what others have to say...

Avg. ride time: 7h 25m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Fast and Supple

  • Familiarity:I've put it through the wringer

Tested the Challenge Criterium in the exact environment it was meant for, fast crits with tight corners. Found these to be lightening fast, reliable for protection from punctures, and supple and capable when cornering. Durability was on pair with comparable high TPI tires.

Do these tires have removable valve cores? Has anyone used Stan's with these?

Hi Steve. These do have a removable valve core. You can use Stan's but I've had great success with Effetto Mariposa Caffelatex Tire Sealant for my Tubulars.