This refers to the angle of the steering axis in relation to an imaginary vertical line through the center of the wheel when
viewed from the side. "Positive caster" is the term used when the vertical line is tilted back toward the rear. If it's
tilted forward, we call it "negative caster." The proper caster angle stabilizes your car for better steering.
This refers to the relationship of all four wheels to each other, as well as their relationship to an imaginary center line
that runs from bumper to bumper. The term "thrust line" refers to the direction in which the rear wheels are pointed. Thrust
angle is correctable on cars with adjustable rear suspensions. If your car has a non-adjustable suspension, thrust angle is
compensated for by aligning the front wheels to the rear wheels.
Why is a Wheel Alignment
It’s no surprise that your vehicle will drive better if all the wheels are pointed in the same
direction. That’s called wheel alignment. If your wheels are out of alignment you may
notice that your car pulls to one side or the other.
Something that you won’t notice right
away, but you will if you keep driving on Highways such as I-71,
I-480 or the Ohio Turnpike when
you’re out of alignment, is that your tires are
wearing unevenly and fairly quickly. That’s because when the
vehicle is pulling to one side, you have to steer it back
straight. The outside of the tire just wears out fast because
you’re constantly turning, which can be very exhausting on a long
road trip from Cleveland – fighting to keep the vehicle
going straight down the road.
Some of the things that commonly throw a wheel out of
alignment are slamming into a pothole in Parma, smacking
a curb in Brunswick or something like a rock while traveling through the Metro-Parks. And it
doesn’t have to be a big shock, it can just be the regular bumps
and bangs of daily driving that add up and eventually take your
vehicle out of alignment. That’s why one of our advisors at
Parma Tire & Automotive
suggest having your alignment checked periodically.
at Parma Tire & Automotive, we measure each wheel’s alignment
and to see where they are relative to factory specifications.
While we have the vehicle on the alignment rack, we inspect the
tires for wear as well as the suspension and steering components
for damage or wear – things that can contribute to
alignment problems. With some sedans you can adjust all
four wheels so we bring all wheels into alignment. On those
vehicles where you can only adjust the front wheels, we bring the
front into alignment relative to the rear.
Cost varies by whether or not it’s two or
four wheel adjustable. Four-wheel drive vehicles may have an
additional charge because they’re more difficult to align. At any
rate, it’s cheaper than having to replace tires every few months.