Mileage coefficient for accounting errors speedometer / odometer in the calculated statistics. Changing to other tires of excellent regular size may affect both the larger and the smaller side (usually not more than 10%). Not considered this by you – it’s forgivable. Not taken this into account by the program – it’s a crime 🙂

**What is the the coefficient [K]**

[K] shows an increase in the distance traveled for one revolution of the wheel and is calculated as the ratio of the original diameter of the wheel:

[К] = (**R2***25.4 + W2***H2***2/100)/(**R1***25.4 + **W1*****H1***2/100)

where: W/H R – the tire parameters 185/60 R15, with an index of 1 – manufacturer equipped, with index 2 – other tires

The coefficient defaults to 1. If you increase the size of the tire the coefficient will increase, too.

*For example:* the 15 “wheel, turning from 55% to 60% gives a gain of 1 cm and both the clearance rate and an error path about 3%.

**Where [K] is defined in the app**

[K] is set in two locations:

- Global settings for each Tire Calculation

For your convenience we provide a built in tire calculator

It allows you to calculate the coefficient without the help of third-party programs and services. This feature is available to users in the PRO version.

2. [K] is indicated for each fuel entry. By default, it pulls the current coefficient [K] from the settings of the vehicle but can be changed at any time through the appropriate icon which brings up the input dialog for the coefficient.

In the process of creating / editing fuel entries [K] can be corrected. [K] records are independent of the [K] configuration settings and will not change [K] in the vehicle settings.

**[K] results**

[K] affects the calculation of flow and route costs period which closes the record with the [K], i.e. It participates in local history and falls on the graphics. The global history is not taken into account, still pondering.

Example: Here’s the latest period for calculating the flow rate which shows about 10L / 100km.

But if [K] was input during a recording different from 1, for example – 1.2, the calculated flow rate is already lower because the odometer does not account for changes in tire size.

The standard way to use [K] – when pereobuvaniya abnormal condition – the vehicle is entered in the settings (or deemed to be in place built-in calculator), when you change back, is reset to 1.

**A few important notes about the [K]**

- Task Use [K] is the adjustment path, or a history of conducting path and accounting changes distance traveled to adjust the flow rate and count the cost of the path.
- I did not put [It] is like a universal tool compensation “after market” or PPC curve odometer, all data on the Meter / Odometer introduced as before, the mileage – the basic scale of reference, fix it as it is.
- If you have another temporary tire (eg winter or mud exits) – speedometer / odometer already show an error. So, the odometer entered as is, but with the help of a local [To] give the program to understand that in this region the mileage the other and must be considered in the calculation of the flow [K]. The program entered the same mileage as on tidy. He is not corrected. Just each record has its [K], which affects the local flow display, etc.

*My car, for example, is factory equipped with a 14″(lt) and 15″ (ltz) discs – nominally. And I use, for example, 15″ in the summer and 14″ in the winter.*

- Yet I suppose to different disks you put tires of different profiles – for example 185/55/15 and 185/65/14 – which by the way gives an error in the vicinity of 2%

*Will the deformation of tires or pressure be considered?*

- No. In case you have reduced the diameter of the wheel very much – create yourself a better adjustment factor.