Avon Tyres has a new line of motorcycle tires aimed at sport and supersport machines. From the Avon press release:
Now available in North America for 2005, Viper builds upon the success of previous Avon ranges and offers a wider choice of sizes and a host of improved technologies.
Viper Sport comprises 11 sizes:
AV59 Front: 110/70R17, 120/60R17, 120/65R17, 120/70R17, & 130/70R16
AV60 Rear: 150/60R17, 160/60R17, 170/60R17, 180/55R17, 190/50R17, 200/50R17
Drawing on Avon’s years of experience the new Viper Sport pattern has been designed to reduce localized flex points in the tread, improving high speed stability. The Enhanced Aqua Flow (EAF) pattern rapidly clears away surface water to increase confidence in the wet.
Viper Sport also boasts a brand new Advanced Tread Arc Combination (ATAC) profile, which varies the tread profile across the tire for the ultimate in handling and stability, whatever the lean angle. The ATAC profile results in neutral contours, ensuring smoother transition on lean angle changes, and noticeably increases stability, especially under heavy braking.
The tread compound features a new ‘high dispersibility’ silica formulation (SIO2-HD) ensuring rapid warm-up times and maximum grip in wet or dry.
In addition, Viper benefits from Avon’s unique Advanced Variable Belt Density (A-VBD) technology, specifically for rear tires. This is a jointless belt of ultra-strong Aramid fibers running round the tire’s circumference. At the centre of the tread, the fibers are closely wound for maximum stability and wear resistance. The closer to the edge of the tread, the further apart the fibers are positioned, broadening the tire’s footprint under cornering loads.
Finally, all components are fine-tuned by Avon’s Enhanced Stability System (ES-System) to deliver a tire in which the carcass, sidewalls and tread pattern work together to reduce localized flexing within the contact patch to optimize grip, durability and warm-up capabilities.
Sharing the same pattern and core technologies, but with the addition of a softer compound (Race-C) is Viper Supersport, available in these sizes:
AV59 Front:120/60R17 & 120/70R17
AV60 Rear: 160/60R17, 180/55R17 & 190/50R17
Avon’s Race-C compound has been developed by test riders on numerous roads and circuits around the world, and then refined to deliver the optimum tire for fast road use and the occasional track day.