Kneesliders will grind deeper into the tarmac this year as Cooper Tire & Rubber Company Europe Ltd. adds the super-grippy Xtreme trackday tyre to its Avon Tyre Viper range. Following on from the successful Viper Sport & Viper Supersport road tyres launched early 2005, Viper Xtreme differs with many new technical attributes to take tyre performance to new limits. Though road legal, a focus on pure track ability has allowed Avon’s technicians to exploit new materials and construction methods.
Visibly similar to the rest of the Viper family, the concentration on dry use allows the tyre’s surface to feature fewer grooves, further apart. This minimal tread enhances grip as Xtreme can lay more of the fast-warming, soft compound rubber on the track.
Further boosting traction levels comes from a contact patch that grows as the motorcycle leans. Advanced Variable Belt Density (A-VBD) is Avon’s construction method using a jointless belt of Aramid fibres, wrapped around the tyre’s circumference. These are closely spaced at the centre of the tread for stability, but become more widely spaced towards the tyre’s shoulder. This allows a degree of flex to broaden the footprint at high lean angles. The Viper Xtreme is Avon’s first front tyre to exploit this technology.
Precise steering and maximum stability are paramount for Xtreme. Keeping composure comes courtesy of Avon’s Advanced Tread Arc Combination [ATAC] profile, varying the tread character across the tyre for neutral contours, ensuring smoother transition on lean angle changes with maximum stability.
Absorbing the stresses associated with exceptional grip levels and high-power machinery are dealt with by a Spiral Belted Carcass [SBC], positioned beneath the A-VBD. At the same time as bolstering strength, rear tyre weight has also been reduced. Viper Xtreme benefits from a mono-ply casing construction as opposed to a standard two-ply construction, feeding in an improved level of rider ‘feel’.
• Recommended for trackday use
• Superb dry weather performance thanks to super-sticky compound
• Reaches optimum working temperatures quickly
• Large footprint at extreme lean angles
• Stable under hard braking
• Matched profiles provide composed turning characteristics
Fitments:VIPER XTREME AV61 FRONT: 120/70 ZR17
VIPER XTREME AV62 REAR: 180/55 ZR17, 190/55 ZR17
These are available from May 2007, for your nearest stockist contact you can call 01225 707050 or visit
www.avonmotorcycle.co.uk
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