Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[cem_devecioglu]

Note from Pirelli technical:-

NEW TYRES TO THE REAR
An analysis of technical enquiries received through the Pirelli Technical "Hot Line" has confirmed the belief that many customers - dealers and users alike - are of the opinion that, when only two tyres are replaced on a car, they should be fitted to the front "axle". This was undoubtedly the case a number of years ago when it was felt that the retention of vehicle control was more critical with front wheel deflations and, therefore, that the new, and thus less vulnerable tyres should be fitted to the front.
However, the current recommendation on the part of the tyre Industry is, as a general rule, NEW TYRES TO THE REAR. This applies to both front and rear wheel drive cars.
Primarily, the justification is increased safety, particularly in the wet, where it has been demonstrated that, with the partly worn tyres fitted to the rear, their diminished water dispersal capability leads to a greater tendency towards oversteer and thus loss of control. Similarly, straight line braking, in the wet can be adversely affected.
It is also arguable that used tyres are more prone to punctures and since it has now been established that rear deflations are more likely to cause loss of control, this is another reason for fitting new tyres to the rear.
As a secondary benefit for the owners of low mileage front wheel drive cars, the switching of the partly worn rear tyres to the front, enabling the new tyres to be fitted to the rear, creates a cycle which helps prevent their deterioration due to ageing/prolonged exposure. The rear tyres wear relatively slowly and leaving them in their original positions for a prolonged period can result in the need to replace them before they are significantly worn.
Note: There are certain circumstances where the principle of NEW TYRES TO THE REAR does not or may not apply. For example:• Where the front and rear tyre sizes are different.
• Where the two new tyres are of a lower speed rating.
• Where the characteristic rear concave wear pattern has developed to an extent that moving rear tyres to the front would affect the stability of the car.
• Where the PZero System™ (directional tyre at the front, asymmetric at the rear) is adopted.
• With certain combinations of winter and summer tyres.• On certain four wheel drive vehicles where it would result in significant differences in tread depth.

it doesnt say anything about snow/ice.. according to them its nonexistent the above rule apply to normal road conditions like dry/wet.. but we are in winter now..

[cruisetopoland]

Note from Pirelli technical:-

NEW TYRES TO THE REAR
An analysis of technical enquiries received through the Pirelli Technical "Hot Line" has confirmed the belief that many customers - dealers and users alike - are of the opinion that, when only two tyres are replaced on a car, they should be fitted to the front "axle". This was undoubtedly the case a number of years ago when it was felt that the retention of vehicle control was more critical with front wheel deflations and, therefore, that the new, and thus less vulnerable tyres should be fitted to the front.
However, the current recommendation on the part of the tyre Industry is, as a general rule, NEW TYRES TO THE REAR. This applies to both front and rear wheel drive cars.
Primarily, the justification is increased safety, particularly in the wet, where it has been demonstrated that, with the partly worn tyres fitted to the rear, their diminished water dispersal capability leads to a greater tendency towards oversteer and thus loss of control. Similarly, straight line braking, in the wet can be adversely affected.
It is also arguable that used tyres are more prone to punctures and since it has now been established that rear deflations are more likely to cause loss of control, this is another reason for fitting new tyres to the rear.
As a secondary benefit for the owners of low mileage front wheel drive cars, the switching of the partly worn rear tyres to the front, enabling the new tyres to be fitted to the rear, creates a cycle which helps prevent their deterioration due to ageing/prolonged exposure. The rear tyres wear relatively slowly and leaving them in their original positions for a prolonged period can result in the need to replace them before they are significantly worn.
Note: There are certain circumstances where the principle of NEW TYRES TO THE REAR does not or may not apply. For example:
• Where the front and rear tyre sizes are different.
• Where the two new tyres are of a lower speed rating.
• Where the characteristic rear concave wear pattern has developed to an extent that moving rear tyres to the front would affect the stability of the car.
• Where the PZero System™ (directional tyre at the front, asymmetric at the rear) is adopted.
• With certain combinations of winter and summer tyres.
• On certain four wheel drive vehicles where it would result in significant differences in tread depth.

Been through this a few times with tyre places, they say the new "rule" is to prevent novice or uninterested drivers losing the rear if tyres are less grippy than the front and not being able to deal with oversteer.

I always use the same brand and type all round, preferring the same wear all round too-possible with decent rotation.