Home

Belarus.NET > Belarus Information Network

ADVISABLE TYRE INSTRUCTIONS

1. WHEEL CHANGE
It's not useful to change wheels often. Their frequent twisting (usually without a dynamometric wrench which provides equable tightening up of nuts) may cause wheel disks' straining. It's advisable to drive untill front wheels approach limiting wear.
Then it is necessary:
- to set two new tyres or a spare wheel and one new tyre in front;
- to set two old but good tyres from behind keeping the same direction of tyre turning, as direction change is undesired at tyre replace. Tyres are adapted for such a change after significant beginning wear.
ATTENTION ! Moment of bolt tightening is 110Nm.

2. WHEEL BALANCING
Wheels of mass manufacturing are balanced by their producer. Balancing adjustment is necessary to compensate maldistribution of heaviness of material heterogeneity. Absence of balancing eventually causes defect of wheel bearings and sometimes carbody swinging. Mainly it's felt on a steering-wheel. Wheels should be sent to balance after every 15000 kilometreage and after every repair connected with tyres because in consequence of wear and replacement connected with repair there is another weight distribution in tyres.

3. CHECK OF TYRE PROFILE
If wheels are balanced, then under careful maintenance of advisable pressure, right fixing of wheel geometry and regular work of absorbers, wheel tyres are worn evenly over the whole relief surface. It's impossible to point tyre's lifetime as it depends on :
- pavement state;
- tyre pressure;
- manner of driving;
- atmospheric conditions.
The main reasons of fast tyre wear are sport drive, surges and hard braking.
ATTENTION !
Check if a pattern has cuts and determine their depth with a small screwdriver. If a cut goes to the bottom, penetrant water may cause steel wire cord corrosion. Sometimes it leads to tread lamination and tyre distortion like "eight". That's why it's necessary to change tyres for safe purposes if they have deep cuts.
ATTENTION !
Instructions require that tyres should be used only till the depth of tread pattern is minimum 1,6 mm. But for safe purposes it's recommended to replace tyres when the depth of a tread pattern is already 2 mm.
If the depth of a tread pattern approaches minimal allowance ( indicator of tyre wear on high of 1,6 mm doesn't have profile) the tyre must be changed immediately.
INSTRUCTIONS FOR MINI-SPARE WHEELS
(mini-wheels, находящихся в а/м зарубежного производства type 115/70R15, 105/70R14 ect.)
If a wheel tire is damaged it's necessary to change the wheel for a new one as soon as possible.
After the mounting of a spare wheel, tire pressure must be checked immediately and be 0,42 MPa (4,2 atm),
as for the seed it shouldn't be more than 80 km/h.
You should avoid acceleration with utter pedal pressing, hard braking and fast drive at corners.
By size a spare wheel is less then the common one which leads to air-gap decrease between an axle and the wheel roughly for 30 mm. To avert the damage of low car details you shouldn't pass significant barriers and delves. It's not recommended to use automatic car-washes because a car can stick in them.
The spare wheel is designed for a special type of an automobile and couldn't be used for another one.
As the spare wheel is not big use of tire chains is unallowable.
It's impossible to set usual tires and snow tires on the disk of such a wheel.
There is no telling about simultaneous setting of two spare wheels with smaller dimensions.
OFF-NORMAL TYRE WEAR
Wear mode
Reason
1. Considerable tire wear of both sides of work face
Too low tire pressure
2. Considerable tire wear in the middle of work face
all over the perimeter
Too hightire pressure
3. Attrition of profile cheek in some places
Absence of static and dynamic wheel balancing.
Excessive side disk runout, too great gap in wheel
bearings or hinges of suspension arms.
4. Attrition of center work face in some places
Absence of static wheel balancing. Excessive side
crown runout.
5. Considerable ware in some places in the middle
of the tread.
Aftermath of wheel blocking at abrupt braking.
Probably a brake drum has an oval form and is
always in the same position at wheel balancing.
6. Scaly or cogged ware of work face profile. In
extreme case it's connected with the break of carcass
base which is lately noticeable outside.
Overloading car. You should check if tire interior
has cracks.
7. Side edges of work face pattern are torn.
Wrong wheel mounting.Tyres rub against the
pavement. If they are back wheels it's necessary
to check absorbers' condition (in front driving cars)
8. Sharp ribs are formed from one side of the front
wheel.
Wrong wheel mounting.Tyres rub against the
pavement. Frequent drive along a very bad
pavement. Farst drive at corners.
9. Carcass base is torn. At first it's noticeably only
from within a tire.
Drive over sharp stones, rail joints with high speed.

Wear mode	Reason
1. Considerable tire wear of both sides of work face	Too low tire pressure
2. Considerable tire wear in the middle of work face all over the perimeter	Too hightire pressure
3. Attrition of profile cheek in some places	Absence of static and dynamic wheel balancing. Excessive side disk runout, too great gap in wheel bearings or hinges of suspension arms.
4. Attrition of center work face in some places	Absence of static wheel balancing. Excessive side crown runout.
5. Considerable ware in some places in the middle of the tread.	Aftermath of wheel blocking at abrupt braking. Probably a brake drum has an oval form and is always in the same position at wheel balancing.
6. Scaly or cogged ware of work face profile. In extreme case it's connected with the break of carcass base which is lately noticeable outside.	Overloading car. You should check if tire interior has cracks.
7. Side edges of work face pattern are torn.	Wrong wheel mounting.Tyres rub against the pavement. If they are back wheels it's necessary to check absorbers' condition (in front driving cars)
8. Sharp ribs are formed from one side of the front wheel.	Wrong wheel mounting.Tyres rub against the pavement. Frequent drive along a very bad pavement. Farst drive at corners.
9. Carcass base is torn. At first it's noticeably only from within a tire.	Drive over sharp stones, rail joints with high speed.