Challenge Strada Ultra Tubular

The Ultra version of the Strada tubular tyre with a silk casing, the world-class tyre for the road: rolls fast and excels in wet corners with plenty of grip.

Tubular tyres:

The tyres of the pros, offering clear advantages in terms of weight, puncture protection and excellent run-flat properties. The inner tube is integrated into the tyre; the tyre itself 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 takes a lot of time and experience to ensure the tyre runs true. We recommend Tufo tubular tyre tape. This sticks almost as well as tubular tyre adhesive and fitting is relatively straightforward.

Challenge Strada Ultra Technology:

• Road bike tyre 27 mm x 622, foldable
• Latex inner tube
• Casing: Silk
• Latex inner tube
• Ganzo Puncture Protection System PPS GANZO
• Handmade in Italy
• Recommended tyre pressure 5.5–7.5 bar, max. 12
• Weight 285 grams

Seta Ultra Handmade Tubular with sealed silk carcass

• 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 – Smart hardness

• 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 the competition’s, 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 Smart hardness grade is the version of Challenge’s natural rubber compounds optimised for long-lasting performance.

Ganzo Puncture Protection System PPS GANZO

• The Ganzo Puncture Protection System is a highly flexible, even more tightly woven multi-component puncture protection system integrated between the tread and the carcass. The Ganzo PPS makes the tyre lighter, even more puncture-resistant and preserves the supple, comfortable character of Challenge tyres.

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