Challenge Dune Ultra Tubular

The super-fast cyclocross tyre with a silk casing for sand and ice, the Challenge Dune instils confidence through excellent handling.

The Dune has been specially developed for cyclocross races on sandy terrain, such as the World Cup race in Koksijde.

The tubular tyre series from Challenge Tyres, as ridden by the pros. These tyres are glued to the rim and offer outstanding puncture resistance and can be ridden at very low air pressure.

Challenge Dune Ultra tyre technology:

• Road bike tyre 33 mm x 622, foldable
• Latex inner tube
• Casing: Silk
• Latex inner tube
• Puncture protection strip
• Handmade in Italy
• Weight 420 grams

Challenge Seta Ultra Handmade Tubular with sealed silk casing

• Handmade tyres combine a multitude 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.

Challenge handmade tubular tyres:

An art in itself. Exclusively manufactured in Italy. The manufacturing process differs completely from that of a standard bicycle tyre. Each individual handmade tubular requires many stages of meticulous handcrafting. Only the most experienced staff are employed to assemble the individual components using a wide variety of assembly, gluing and sewing techniques.

Handcrafted natural rubber – Soft compound

• Challenge’s handmade natural rubber treads are formulated to offer the perfect balance of durability without compromising performance, comfort or 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 Soft compound ensures maximum control, grip and performance.

Puncture Protection System (PPS)

• The PPS 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