Vredestein launches its “ultimate high performance tyre”
Apollo Vredestein has introduced its new ultra high performance summer tyre in Budapest, the Ultrac Vorti. The tyre, like the simultaneously launched Sportrac 5, has been designed by Italian company Giugiaro for a sporty, distinctive appearance. Vredestein says the Y-indexed tyre excels in terms of grip, handling and braking on both dry and wet surfaces. The Ultrac Vorti name was also created by Giugiaro, inspired by the powerful vortex air flow that is generated, for example, when a helicopter takes off. The name reflects the speeds and forces that the Ultrac Vorti can handle, rated for up to 300kmh, while the tread is reminiscent of the tips of helicopter blades.
The company says the Ultrac Vorti is the result of “intensive cooperation” with automotive industry partners; in addition to Giugiaro, with which the Vredestein brand has a 15 year relationship, premium car tuners such as Carlsson, Arden and Lumma added value in its development. With many years of experience represented by Vredestein and the premium car tuner partners, Apollo Vredestein has blended advanced technologies, design and renowned Apollo Vredestein safety aspects in the new Ultrac Vorti.
The tread and sidewall design of the Ultrac Vorti have been created to help the tyre stand out for its sportiness, style and innovation, says Apollo Vredestein, The outer walls of the two circumferential grooves have a double angle, one at 45°, to achieve greater lateral block stability and better compensate for the sideways forces around bends. The lateral grooves also have an angle of 10° to achieve even rolling, prevent uneven wear and maintain low sound levels. Special arrowheads in the tread reinforce the tyre’s course keeping ability.
Many sports cars have different tyre sizes for the front and rear axle to take account of their high engine capacity, and the Ultrac Vorti therefore has an adapted tread and dedicated construction for sizes used on the rear axle. As the front tyres discharge most of the water on wet surfaces, the emphasis for the rear tyres is on grip and stability, with a reduced air ratio and an adjusted belt angle for an better grip.
In contrast to the more common three-radii contours, the Ultrac Vorti has a four-radii contour, designed to increase the contact surface and even surface pressure distribution. When taking bends, the outer shoulder of the tyre carries the heaviest load, which results in changes to its footprint and surface pressure distribution. The renewed tyre contour ensures a smooth transition round bends. The tyre has an asymmetrical tread, and Apollo Vredestein explains that this asymmetry increases the outer shoulder’s contact with the road when manoeuvring to the right and left, building up a larger lateral force. This in turn has a positive effect on handling.
The Ultrac Vorti has an intelligent, asymmetrical distribution of the tread blocks in the shoulder of the tyre. Together with an optimised angle of the lateral shoulder grooves this minimises noise production. Shifting the blocks on the inner and outer shoulder of the tyre in relation to each other prevents any sound amplification. This makes the tyre even quieter; not only when new but throughout its entire lifespan.
The Vredestein Ultrac Vorti is available in the following sizes:
Front and rear sizes
225/40 ZR18 92Y XL
235/40 ZR19 96Y XL
235/35 ZR19 91Y XL
255/35 ZR19 96Y XL
245/35 ZR20 95Y XL
255/35 ZR20 97Y XL
285/30 ZR19 98Y XL
275/35 ZR20 102Y XL
275/30 ZR20 97Y XL
285/35 ZR20 104Y XL
295/30 ZR20 101 Y XL