Choose quality, choose reputation, choose Challenge.

Features

Open Tubular - An open tubular is constructed using the same casing and tread materials and process as a tubular, but instead of sewing the casing together (closed), the sides of the tubular casing are folded around aramid fiber cords to produce beads. This ‘open’ design performs like a tubular, yet conveniently mounts like a standard clincher tire. If combined with a Latex inner tube the ride becomes even closer to that of a tubular, offering excellent traction and cornering, low rolling resistance and shock absorption.


PPS2 - The Puncture Protection Strip is a special aramid fabric placed between a tire’s tread and casing to increase resistance to punctures. Some tires designed for use on rough roads, cobbles and gravel receive PPS2, an additional layer of PPS between the casing and the inner tube.

Latex - Challenge sources high-grade natural Latex to produce the only seamless Latex inner tube on the market. Due to the lack of seams, these tubes have no bumps or added weight that commonly cause a tire to feel out of round. This also improves the overall strength of the tubes as seams are commonly the weak point on an inner tube.

Latex inner tubes are also very elastic, allowing them to initially wrap around a foreign object, rather than immediately puncturing.

Warning: because of its elasticity, installation of a Latex tube requires the skills of an experienced hand. Latex tubes can be more prone to pinch flats if not installed properly.

Handmade - Every Challenge tubular and open tubular is produced by hand. This handmade process minimizes the use of heat treatments and specifically avoids the industry-standard extreme heat treatment called vulcanization. By resisting these common practices, Challenge is able to provide the ultimate quality standard in high-performance products.

Challenge's handmade production allows their treads, casings and inner tubes to maintain their original suppleness and flexibility, achieving the best grip for controlled cornering, rapid accelerations and flat-out speed. A supple Challenge tire is able to absorb and reduce harmful vibrations passing from the road to the body, normally produced by riding stiffer vulcanized tires, ultimately reducing muscle stiffness, inflammation and fatigue.

Specifications

Use: Hard Pack Dirt to Light Gravel

Size: 700

Tire Width: 33 mm

Rim Width: 15-19 mm

Weight: 385g

TPI: 260

Bead: Aramid

Casing: SuperPoly

Flat protection: Double PPS

BAR: 3-9

PSI: 45-130

Colour: Black, Black/Tan

NOTE

NOT TO BE USED WITH TUBELESS RIMS OR ENVE WHEELSETS.

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