 www.etyres.co.uk
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In the site:
4x4 tyres off-road performance requirements & 4x4 vehicles of BMW, Porsche luxury terrain use
They are a tyre that will give a relatively quiet, comfortable ride whilst used on-road but also possess a better off-road ability that the two previous categories.
Tyre Categories
On Road: Performance
4x4 tyres designed primarily for on-road use are now more popular than ever.
Obviously with such a heavy, aggressive tread pattern, mud terrain tyres, whilst useable for on-road driving would not be a recommended fitment due to the relatively high levels of noise and vibration - think of a tyre from the rear of a tractor!
Off-road All Terrain v Mud Terrain (Bridgestone): All Terrain.
On-Road: Terrain
Although on-road terrain may seem to be something of a contradiction, these tyres are designed for vehicles that, although used predominantly on-road DO have the occasional off-road experience.
Tyres for vehicles such as these now include such features as directional tread, high performance tread compounds and many others.
Conclusion:
In order to obtain the best possible performance form a 4x4 vehicle it is essential to determine which tyre is the correct one for your vehicle.
You can clearly see the aggressive, directional patterns that give the tyre its excellent dry and wet grip although off road and heavy snow performance will be limited - not a major problem with vehicles used predominantly on-road.
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Off-Road
Performance requirements for an off-road tyre will, obviously, differ greatly than those for an on-road.
The 4x4 market has expanded to become the fastest growing sector of new vehicle registrations. Gone are the days when a 4x4 vehicle meant driving an ex-army vehicle with no heaters, wipers, performance, etc. Today's 4x4 vehicles are some of the most sophisticated on the road. Even manufacturers that many years ago may not have considered a 4x4 vehicle in their model line-up are selling as many as they can build - BMW X3 and X5, Porsche Cayenne... to name but a few.
Vehicles such as BMW X5, Porsche Cayenne, Volvo XC90 to name but a few are demanding performance from a tyre previously only required for high performance road cars.
The vehicles that these are designed to be fitted to, although capable of working off-road will be limited in their off-road capabilities.
Again with these vehicles there is always the option to upgrade wheel and tyres to 20" or even 22" and above.
Drive any long distances on the motorway with these tyres fitted and you will soon be aware of the reasons they are not recommended for regular road going use.
All terrain tyres usually have a heavy tread pattern (compared to on-road tyres) and a robust tread construction to resist impact damage whilst working of road.
Off-road tyres, in particular Mud Terrain tyres, perform superbly in all conditions encountered off the beaten track.
Even manufacturers that many years ago may not have considered a 4x4 vehicle in their model line-up are selling as many as they can build - BMW X3 and X5, Porsche Cayenne to name but a few.
Most manufacturers break down their range of 4x4 tyres into different categories dependant on the type of vehicle and also the usage of the vehicle.
For instance, a high performance 4x4 used predominantly for on-road application will require a relatively quiet, comfortable tyre compared to an older type 4x4 that spends the vast majority of its life working off-road.
In recent years the 4x4 market has expanded to become the fastest growing sector of new vehicle registrations, in 2002 the demand for 4x4 tyres was 250% of that for 1997.
They will know what sector of the market a particular vehicle is aimed at and will fit tyres accordingly.
The development and diversification of the 4x4 tyre market requires that these 3 main categories be further split into sub categories as below: Performance - high performance, 100% on-road use.
The main difference is that, due to the type of vehicle to which they are fitted, they need to offer a higher degree of performance whilst offering a similarly high degree of comfort - low noise and vibration.
Tyres for off-road use will include such features as heavy, rugged tread patterns, stronger carcass construction (to resist the heavy impact and deflection associated with off-road use) and cut resistant tread compounds.
In the past most 4x4 vehicles were equipped with either 15" or 16" wheels and fitted standard (80 series) or possible 70 series tyres with either "S" (113mph) or "T" (118mph) speed rated tyres.
Winter tyres are designed to run at very low ambient road temperatures and will have very different characteristics and technologies to "normal" 4x4 tyres including ice compound tread rubber, special sipe arrangements and even holes in the tread to allow for studding of the tyre for ice use.
On Road: Luxury
Luxury 4x4 tyres are, as are the performance tyres, designed to be used predominantly on-road.
Whereas an on-road tyres' main requirement is good dry surface performance and comfort, an off-road tyre will be more concerned with traction in a variety of conditions.
The market tends to split 4x4 vehicles into 4 categories: SUV's (Sports Utility Vehicles) - Freelander etc.
Probably the biggest improvement is to be seen in the vehicle performance - for instance the Porsche Cayenne Turbo puts out 450bhp with 620 nm of torque, and will easily outperform the vast majority of cars of the road.
4x4 tyres off-road performance requirements 4x4 vehicles of BMW, Porsche luxury terrain use.
Gone are the days when a 4x4 vehicle meant driving an ex-army vehicle with no heaters / wipers / performance etc.
To cope with the extra power and performance of these new vehicles the tyre requirements have changed dramatically.
High performance on-road tyres such as those listed previously will perform very well on the surface they are designed for - take them off road into heavy conditions and the off-road capabilities will be put severely to the test.
In order to accommodate the extra requirements of the vehicle manufacturer in relation to the performance of these vehicles the tyres have had to change dramatically.
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