Challenge Grifo Ultra tubular tyre

The professional’s cyclocross tubular tyre with a hand-built silk casing, high-end quality with 1000+ TPI

Cyclocross World Champion for many years running, ideally suited for professionals and riders who love riding in extreme conditions. Incredible grip and no compromises on rolling resistance – that’s what sets the Challenge Grifo Pro Open apart. Equipped with a 300 TPI polyester casing and a Puncture Protection Strip, an additional layer of high-strength fabric between the casing and the tyre to reduce the risk of punctures.

Tubular tyres:

The tyres of the pros, offering clear advantages in terms of weight, puncture protection and excellent run-flat performance. The inner tube is integrated into the tyre, which is completely sealed, either stitched or glued. The tubular tyres themselves are glued to the rims. This is why tubular rims do not have a rim flange to hold the tyre in place. This prevents punctures and also allows for significantly lighter rims. The downside is fitting the tubular tyres. Gluing them with tubular tyre adhesive requires a lot of time and experience to ensure the tyre runs true. We recommend Tufo tubular tyre tape. This adheres almost as well as tubular tyre adhesive and fitting is relatively straightforward.

Challenge Grifo Ultra Tubular Tyre Technology:

• Road bike tyre 33 mm x 622, foldable
• Casing: Super Poly 1000+ TPI
• Handmade in Italy
• For 20–28 mm rim width
• Latex inner tube
• Tyre pressure: 2–5 bar
• Weight 410 grams

Seta Ultra Handmade Tubular with sealed silk casing

• Handmade tyres combine a variety of outstanding features to offer maximum comfort and minimal rolling resistance. Carefully selected materials are used in the various tyre grades depending on performance requirements. Soft, supple casings quickly adapt to the shape of the ground when rolling and cornering. This increases ground contact and grip and improves shock absorption on poor road surfaces. Soft, natural rubber treads are combined with lightweight, flexible puncture protection.
• You can think of the three types of handmade casings in much the same way as shirts made from the same material. The finest casings are made from silk, just like the finest suits, ties, scarves and shirts. Silk is a strong, soft, natural fibre, but the high cost and labour-intensive processing mean that this level of quality is almost exclusively reserved for world championships and Olympic competitions.

Latex tube

• Latex tubes are strong, lightweight and extremely flexible. They absorb shocks and significantly reduce rolling resistance by adapting perfectly to obstacles.

Handcrafted natural rubber – Soft compound

• Challenge’s hand-crafted natural rubber treads are formulated to offer the perfect balance of durability without compromising performance, comfort and control. Although Challenge tyres wear out 10–20 per cent faster than those of the competition, they score highly with significantly improved performance and a noticeably better riding experience throughout their entire lifespan. Depending on requirements, the tyres are fitted with rubber compounds of varying softness.

• The Soft compound ensures maximum control, grip and performance.

Puncture Protection System, PPS

• The Puncture Protection System consists of one or more layers of fabric between the tread and the tyre carcass. PPS significantly increases the tyre’s resistance to punctures, thereby offering maximum reliability.

Herstellerinformation: Challenge, Via Gattamela 41, 20149 Milan, Italy, https://www.challengetires.com