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[STEMO]

GY Eagle F1 is an asymmetric but NOT a directional tyre, so can go on any wheel provided the outside is on the outside ..   which is quite easy to check as it has a rim protector .. which should be visible ..... 

UniRoyal RainSport 3 is an asymmetrical directional tyre .... 

The asymmetrical bit is not that important .. providing its on the wheel the right way round - as directional tyres can only be swapped front - rear on the same side .. and NEVER side to side

It can be swapped from side to side. Inside becomes outside.

[05omegav6]

GY Eagle F1 is an asymmetric but NOT a directional tyre, so can go on any wheel provided the outside is on the outside ..   which is quite easy to check as it says OUTSIDE on it.. which should be visible ..... 

UniRoyal RainSport 3 is an asymmetrical directional tyre .... 

The asymmetrical bit is not that important .. providing its on the wheel the right way round - as directional tyres can only be swapped front - rear on the same side .. and NEVER side to side

It can be swapped from side to side once it has been removed from the wheel turned over and refitted. Inside becomes outside and the direction of rotation remains the same.

Both fixed

[STEMO]

GY Eagle F1 is an asymmetric but NOT a directional tyre, so can go on any wheel provided the outside is on the outside ..   which is quite easy to check as it says OUTSIDE on it.. which should be visible ..... 

UniRoyal RainSport 3 is an asymmetrical directional tyre .... 

The asymmetrical bit is not that important .. providing its on the wheel the right way round - as directional tyres can only be swapped front - rear on the same side .. and NEVER side to side

It can be swapped from side to side once it has been removed from the wheel turned over and refitted. Inside becomes outside and the direction of rotation remains the same.

Both fixed

That's exactly what I said, just more long-winded.

[Entwood]

Further research ...

The RainSport 3 is NOT a directional tyre .. even thougth many suppliers quote is as one ..my apologies.. explanation can be found here .. right down the bottom ..

http://www.oponeo.co.uk/tyre-article/the-uniroyal-rainsport-3-a-new-rain-tyre

" According to the manufacturer’s website, the RainSport 3 is a tyre having an asymmetric tread with optimized water flow, rather than a directional tyre. The contact patch of a UHP tyre is short and wide, and the tread channels in the RainSport 3 are long and set at an acute angle to the direction of travel, so only small sections of them are in contact with the road at the same time.

The direction of the tread channels in the Uniroyal RainSport 3 is not important, because they function more or less the same as circumferential grooves in a standard tyre."

My apologies

A "true" Asymmetric Directional tyre is the P Zero Corsa ,,,

http://www.tirerack.com/tires/tires.jsp?tireMake=Pirelli&tireModel=P+Zero+Corsa+System

"The P Zero Corsa Asimmetrico tread design features a semi-slick, low void ratio and a large external shoulder structure with a minimum number of grooves to eliminate the blocky structure of a conventional pattern. The P Zero Corsa System Asimmetrico asymmetric and directional tread design requires separate left and right side tires for the vehicle as branded on each tire's sidewall. The tire's internal structure includes highly flexible steel belts reinforced by spirally wound nylon to enhance cornering stability and provide high-speed capability while reducing weight."

My bold ... 

Original Equipment for the road versions of Ferrari 360 Challenge, Lamborghini Gallardo and Porsche GT2 & GT3 cars, so 'Kin expensive !!

[TheBoy]

But a directional and asymmetric is sided, so if you have wrong tyre, you're stuffed

[TheBoy]

And most directional tyres now are assymetric

[STEMO]

Further research ...

The RainSport 3 is NOT a directional tyre .. even thougth many suppliers quote is as one ..my apologies.. explanation can be found here .. right down the bottom ..

http://www.oponeo.co.uk/tyre-article/the-uniroyal-rainsport-3-a-new-rain-tyre

" According to the manufacturer’s website, the RainSport 3 is a tyre having an asymmetric tread with optimized water flow, rather than a directional tyre. The contact patch of a UHP tyre is short and wide, and the tread channels in the RainSport 3 are long and set at an acute angle to the direction of travel, so only small sections of them are in contact with the road at the same time.

The direction of the tread channels in the Uniroyal RainSport 3 is not important, because they function more or less the same as circumferential grooves in a standard tyre."

My apologies

Please don't apologise, Nigel. Your input is greatly appreciated and we only get to a conclusion (sometimes) after we've all had our say 

[Andy B]

Further research ...

The RainSport 3 is NOT a directional tyre ..  ...

I know, I fitted four to my Smart the other month. They have 'outside' written on the side of the tyre

[STEMO]

And most directional tyres now are assymetric

Depends where you look:

Standard car tyres usually have a symmetrical pattern running across the entire tread. Some high performance cars however are fitted with tyres with special tread patterns. These asymmetric and directional tyres must be fitted the right way round on the wheel. Incorrect fitting of both is a reason for MOT failure.

[Entwood]

I was amending my post while you guys posted ... info on a "true" Asymmetric Directional tyre now a few posts back !!

[05omegav6]

So basically...

Webby has his work cut out matching the original tyre characteristics for his 0-60 test

[Webby the Bear]

as I said before I am yet to fit a tyre that have both arrows for direction and marked outside

[STEMO]

Further research ...

The RainSport 3 is NOT a directional tyre .. even thougth many suppliers quote is as one ..my apologies.. explanation can be found here .. right down the bottom ..

http://www.oponeo.co.uk/tyre-article/the-uniroyal-rainsport-3-a-new-rain-tyre

" According to the manufacturer’s website, the RainSport 3 is a tyre having an asymmetric tread with optimized water flow, rather than a directional tyre. The contact patch of a UHP tyre is short and wide, and the tread channels in the RainSport 3 are long and set at an acute angle to the direction of travel, so only small sections of them are in contact with the road at the same time.

The direction of the tread channels in the Uniroyal RainSport 3 is not important, because they function more or less the same as circumferential grooves in a standard tyre."

My apologies

A "true" Asymmetric Directional tyre is the P Zero Corsa ,,,

http://www.tirerack.com/tires/tires.jsp?tireMake=Pirelli&tireModel=P+Zero+Corsa+System

"The P Zero Corsa Asimmetrico tread design features a semi-slick, low void ratio and a large external shoulder structure with a minimum number of grooves to eliminate the blocky structure of a conventional pattern. The P Zero Corsa System Asimmetrico asymmetric and directional tread design requires separate left and right side tires for the vehicle as branded on each tire's sidewall. The tire's internal structure includes highly flexible steel belts reinforced by spirally wound nylon to enhance cornering stability and provide high-speed capability while reducing weight."

My bold ... 

Original Equipment for the road versions of Ferrari 360 Challenge, Lamborghini Gallardo and Porsche GT2 & GT3 cars, so 'Kin expensive !!

And not tyres any of us are likely to come across.

[Sir Tigger KC]

Ah we havn't had a decent tyre thread for a while! 

It's only a matter of time before one of Gixer's doppelgangers chips in!   

[baggers]

http://www.oponeo.co.uk/tyre-article/the-uniroyal-rainsport-3-a-new-rain-tyre

Quote from website-- "The Uniroyal RainSport 3 has an asymmetric tread with a directional outer part." Unquote.

So with the "OUTSIDE" showing on the O/S of the car it will clearly grab water to the centre of the tyre unlike being fitted to the N/S.  But Uniroyal say it doesn't matter.