Tire tread gauges are small rulers
designed to be inserted into tire treads to measure the remaining tread
depth. Local legislation may specify minimum tread depths, typically
between 1/8" (3.2 mm) and 1/32" (0.8 mm). Wearbars may be designed into
the tire tread to indicate when it is time to replace the tire.
Essentially, part of the tire tread is shallower than the rest and will
show when the tire is worn down to that level.
Car Auctions
There is currently an attempt to reinforce the tire with nanomaterial.
This is likely to increase the tire life, but may turn out to be a bad
idea if the worn out part of nanocarbon deposited on the roads is washed
off and ends up in the food chain.
GOLF
Types of automobile
discount tires
Performance tires
Performance tires tend to be designed
for use at higher speeds. They often have a softer rubber compound for
improved traction, especially on high speed cornering. The trade off of
this softer rubber is a lower treadwear rating.
Performance tires are often called summer tires, because they sacrifice
wet weather handling, by having shallower water channels, and tire life
from softer rubber compounds, for dry weather performance. The ultimate
variant of performance tires has no tread pattern at all and is called
slick tire. Slick tires are not legal for use on public roads in most
countries due to their extremely poor wet weather characteristics.
Winter tires
Winter tires are designed to
provide improved performance under winter conditions compared to tires
made for use in summer. The rubber compound used in the tread of the
tire is usually softer than that used in tires for summer conditions, so
providing better grip on ice and snow. Winter tires often have fine
grooves and siping in the tread patterns that are designed to grip any
unevenness on ice. Winter tires are usually removed for storage in the
spring, because the rubber compound becomes too soft in warm weather
resulting in a reduced tire life.
Dedicated winter tires will bear the "Mountain/Snowflake Pictograph" if
designated as a winter/snow tire by the American Society for Testing &
Materials. Winter tires will typically also carry the "M&S" (Mud and
Snow) designation.
Many winter tires are designed to be studded for additional traction on
icy roads. The studs also roughen the ice, so providing better friction
between the ice and the soft rubber in winter tires. Use of studs is
regulated in most countries, and even prohibited in some countries due
to the increased road wear caused by studs.
Some of
the well know discount tire brands: Goodyear Tires | Michelin Tires
All-season tires
These are an attempt to make a tire
that will be a compromise between a tire developed for use on dry and
wet roads during summer, and a tire developed for use under winter
conditions, when there is snow and ice on the road. However, the type of
rubber and the tread pattern best suited for use under summer conditions
cannot, for technical reasons, give good performance on snow and ice.
The all-season tire is therefore a compromise, and is neither an
excellent summer tire, nor an excellent winter tire.
All-Season tires are marked M+S, i.e. the same as winter tires. However,
due to the compromise with performance during summer, winter performance
is usually not comparable with a winter tire.
All-terrain tires
All-terrain tires are typically
used on SUVs and light trucks. These tires often have stiffer sidewalls
for greater resistance against puncture when traveling off-road, the
tread pattern offers wider spacing than all-season tires to evacuate mud
from the tread.
Within the all-terrain category, many of the tires available are
designed primarily for on-road use, particularly all-terrain tires that
are originally sold with the vehicle.
Mud tires
Mud terrain tires are
characterized by large, chunky tread patterns designed to bite into
muddy surfaces and provide grip. The large open design also allows mud
to clear more quickly from between the lugs.
Mud terrain tires also tend to be wider than other tires, to spread the
weight of the vehicle over a greater contact patch to prevent the
vehicle from sinking too deep into the mud.
Depending on the composition and tread pattern, many mud terrain tires
are not well suited to on-road use. They can be noisy at highway speeds,
and due to the open tread design, they have less of a contact area with
the road, limiting traction. The large lugs on mud tires tend to tear
and chip on roads, because they are made from hard rubber compounds that
do not bend easily.
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