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Continental
ContiSportContact 2 Vmax |
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The ContiSportContact 2 Vmax is
Continental's Max Performance Summer tire that was designed to be
the fastest "off-the-shelf" tire in the world. Intended for
ultra-fast, high-end customized sport cars & performance sedans,
the ContiSportContact 2 Vmax is the first road tire certified by
Continental for speeds of up to 225 mph (360 km/h), a speed at which
the tires must withst& revolving approximately 50 times every
second while they carry the vehicle 330 feet (100 meters) down the
road.
The main challenge for the ContiSportContact 2 Vmax is to master the
extreme centrifugal forces on the tire surface & dissipate the
heat. As tires roll faster, centrifugal forces & tire temperatures
grow. With several tons of weight per square inch stressing the
tread at high speeds, tire temperatures can heat up beyond
200-degrees Fahrenheit.
An additional challenge of high-speed tires is that standing waves
may develop in the tread area & sidewall. A radial tire's tread
flattens & its sidewalls bulge where it comes into contact with
the road. At low speeds, it's easy for the tire to transition
between the tire's loaded shape & its relaxed shape before
returning to its loaded shape as the tire contacts with the road
again. However at high speeds, this process occurs so rapidly that
the tire may not be able to switch between shapes before the tire's
next contact with the road, causing a ripple in the tread area &
sidewall. The tire's structure must provide the control required to
avoid the destructive heat generated during this transformation at
high speeds.
On the outside, ContiSportContact 2 Vmax tires feature a tread
compound molded into the familiar ContiSportContact 2 asymmetric
tread design with several important design differences to help keep
temperatures down. The tread ribs have been modified by enlarging
the existing grooves & adding circumferential cooling grooves &
lateral notches to reduce the rubber volume while increasing
hydroplaning resistance on wet roads. Sipes in the tread pattern
make the tread more supple, & beginning tread depths have been
reduced by about 15 percent (molded at only 7/32- to 9/32-inch
compared to the typical 9/32- to 10/32-inch) to cut heat generation
by about one half.
On the inside, the ContiSportContact 2 Vmax have exceptionally
strong steel belts, nylon belt reinforcement & a multi-radii tread
contour to distribute the forces on the belt more uniformly &
reduce the stress on the belt edges to ensure that the tire can
withst& high speeds. The ContiSportContact 2 Vmax has been
designed with a reinforced sidewall & the number of wires in the
bead core has been increased from 25 to 36, thus guaranteeing the
tire resists standing waves & holds the rim firmly.
Continental ContiSportContact 2 Vmax tires feature black sidewall
styling with subtle black letters reversed out of a circumferential
serrated band. They are Z-speed rated & available in selected 35-,
30- & 25-series sizes for 19" wheel diameters. |
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