These are the most common malfunctions of components and mechanisms of the chassis of the car
During operation, if the factory adjustments for the installation of the car’s wheels are violated — this occurs due to wear on the suspension assemblies, pivot joints of the pivot pins and steering linkage, wheel bearings, deformation of the front axle beam and swing arms. As a result, the original dimensions change and the backlash in the joints increases.
Also, the alignment angles of the front wheels may vary as a result of:
● deformation of the upper and lower parts of the body in a road accident or when the vehicle’s carrying capacity specified in its technical specification is exceeded;
● driving at high speed on unimproved roads, potholes and bumps;
● impacts on curbstones, collisions with manhole covers, rail tracks;
● replacement or repair of suspension and steering parts entailed deviation of the wheel alignment angles from the norms.
The fact that there is a deviation of the wheel alignment angles from the norm is evidenced by the following factors:
● characteristic uneven one-sided wear of the tyre tread;
● increased noise from tyres while driving;
● “squeal” of tyres when cornering even at low speed;
● loss of directional stability of the car when colliding with road nerves;
● a noticeable increase in the steering wheel’s effort when driving in a straight line or the car drifting to the side when the steering wheel is released.
Violation of the specified angles of installation of the steering wheels of the car causes an increase in 1.5–2 times of uneven, as a rule, one-sided wear of the tyre tread increases fuel consumption and wear of suspension parts due to an increase in unpredictable loads, significantly impairs the stability and controllability of the car, and movement.
When driving on a bend, on uneven or slippery roads, improper toe-in of the wheels often leads to an earlier breakdown into a skid, with all the ensuing severe emergency consequences.
Incorrect toe and camber cause intense wear of the tyre tread due to additional slippage of the tread elements in contact between the tyre and the road. The cause of slippage is a mismatch between the direction of rotation of the wheels and the vehicle’s direction of movement.
With an increased toe angle, increased wear is noted along the tread’s outer edge, on which sharp edges appear directed towards the vehicle’s longitudinal axis. With insufficient toe and toe (negative toe), lateral oblique sawtooth wear occurs along the tread’s inner edge (stepped edges outward). In case of large deviations (10–15 mm) from the recommended toe-in, for example, the tyres of a light truck can be worn out as early as 1000 km.
The tread of the tyres is especially worn out when the wheels toe out. In this case, the car loses stability more than with increased toe-in.
Multiple tests of cars at a speed of 70–90 km / h showed that with normal wheel alignment, the rolling resistance for all four tyres is 20 kg. The additional rolling resistance of the front tyres in an excessive toe or 1 ° toe is 8.5 kg. And this leads to a deterioration in the engine’s fuel economy and the dynamic properties of the vehicle.
We recommend installing Falken Wildpeak HT01 if you own an SUV. Check with your nearest tyre service shop to see if the tyres mentioned above are compatible with your vehicle.
It should be especially noted that wheel convergence has a much more significant effect on tyre tread wear than tyre camber, but to a lesser extent — on vehicle stability while driving. A large deviation of the toe value in one direction or the other leads to a loss of stability — the car begins to “scour” the road, especially when driving at high speed.
With a significant negative camber angle, a stepped (rarely smooth) wear of the tread’s inner edge occurs. The intensity of wear increases sharply with a large difference in the right and left wheels’ camber angles. In this case, when driving in a straight line, the car will noticeably lead to the side.
Suppose the camber of the right and left wheels are asymmetric. In that case, this causes the car to move away from the straight-line movement, and, as a result, it becomes necessary to continually correct the direction of movement by the steering wheel. Therefore, wear in the form of “steps” (sawtooth wear) can occur on the tyres’ tread. With a combination of camber violation (if it remains symmetrical) and toe-in of the front wheels, uneven wear of the tyre tread is also noted.
The strut’s longitudinal tilt affects the treadwear only if the tilt angles are different on both wheels. One of the front tyres will wear out intensively. The wear is one-sided with some stepped or sawtooth signs.