Advice 1: How to determine tire wear

The reason for the huge number of accidents and road accidents is failure to replace worn-out motorists tire.So if you are the owner of the car, it should clearly follow the rule: if the rubber "bald", it must be replaced. But how to determine whether you need tyres to be replaced or not? There are several reliable ways to determine the degree of wear of the tires of your car.
How to determine tire wear
You will need
  • - measuring tire tread
  • - line
  • - Vernier caliper.
Instruction
1
The easiest way to determine the tire wear with the help of the device measuring tire tread. This affordable and easy to operate device can be purchased at almost any parts store or service center where your car is serviced.In order to determine the degree of tire wear, turn on the meter and place it in the groove of the tread. Then take a look at the numbers that will appear on the screen. If you have winter tires, the device should show not less than 4 mm residual thickness of the rubber, if the summer - not less than two millimeters. If the readings of the meter protector less, you need to replace the tires.
2
The degree of tire wear can also be defined manually using calipers and a ruler.
It is necessary to measure with a caliper the height of the tread. You do this by placing the needle in the groove Vernier caliper, measure the distance from the bottom of the groove to its top edge. Then remove the caliper and with a range of calculate how much would be the distance in millimeters. Criteria for the evaluation of wear the same as when measured with a meter tread: four and two millimeters respectively.
3
On some models, tires, e.g. tire manufacturing, Michelin and Nokian on the inner part of the protector marked numbers, which are gradually disappearing, showing the degree of wear rubber. Figure 8 refers to eight millimeters of the residual thickness, 6 - six millimeters, and so on. Focusing on these figures, you will be able not to miss the moment when the tires need replacement.
Note
To change tyres it is necessary not only when they wear from the time the rubber ages, causing worse sticks to the road, it cracks and deformation. In this case, replacement of tyres: continued operation may be unsafe.

Advice 2 : How to calculate depreciation of the car

Know the depreciation of your car not only necessary, but very necessary. First, it is necessary in those cases, if the car is used for business purposes. That you gave money for its repair or purchase of some necessary details, you need to calculate how worn out a vehicle during operation. Also, the depreciation required for a contract with an insurance company. After all, according to her, there will be insurance payments.
How to calculate depreciation of the car
Instruction
1
Experts recommend make a special diary. It is necessary to specify in sufficient detail the work that was done with the car during the year. For example, fill the column how many miles was the car passed, how many times has changed the consumables (oil, filters, pads, etc.). Of course do not forget to specify global and repairs. For example, glass replacement, muffler repair and more. Be sure to specify in this diary prices. They need to confirm cheques. Therefore, if you want to wear the car was counted correctly, we have to do the monotonous work of collecting checks.
2
Please note that sometimes the accountant are certain systems of calculation. Them car amortization for the year on average is around 10-20 % of the cost of a new car. So, if you want to calculate depreciation, according to this system, simply multiply the number of years of your vehicle on these percentages. However the position is relevant only for "young" cars, usually not older than 5 years. After depreciation is calculated somewhat differently. But in this scheme, calculate no repairs to be paid by you will not. Therefore, in this situation to collect checks is a waste of time.
3
Another method to calculate the depreciation of a car is called non-linear. Here, the basis of depreciation for the residual value of the car. When the residual value is 20% of the initial price, the calculation looks like this: you receive a base rate from which further and produced the rest of the calculations. As a rule, to simplify the problem of calculating wear this base rate divided into the number of months that remains until the end of the period of use of this tool in operation.
4
In some cases, the amount of depreciation can be increased by raising factors. These include work in an aggressive environment, the use of the vehicle for agricultural purposes, the vehicle is in the industrial economic zone special purpose. This is subject to paragraph 7 of article 259 of the Tax code of the Russian Federation.
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