found this on the net (link given to my by blackers10)

Lies, Damn Lies and Speed ratings.

All tyres are rated with a speed letter. This indicates the maximum speed that the tyre can sustain for a ten minute endurance without coming to pieces and destroying itself, your car, the car next to you and anyone else within a suitable radius at the time.



'H' rated tyres are becoming the most commonplace and widely used tyres, replacing 'S' and 'T' ratings. Percentage-wise, the current split is something like this: S/T=67%, H=23%, V=8%. Certain performance cars come with 'V' or 'Z' rated tyres as standard. This is good because it matches the performance capability of the car, but bad because you need to re-mortgage your house to buy a new set of tyres.

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Load indices.

The load index on a tyre is a numerical code associated with the maximum load the tyre can carry. These are generally valid for speed under 210km/h (130mph). Once you get above these speeds, the load-carrying capacity of tyres decreases and you're in highly technical territory the likes of which I'm not going into on this page.
The table below gives you most of the Load Index (LI) values you're likely to come across. For the sake of simplicity, if you know your car weighs 2 tons - 2000kg - then assume an even weight on each wheel. 4 wheels at 2000kg = 500kg per wheel. This is a load rating of 84. The engineer in you should add 10% or more for safety's sake. For this example, I'd probably add 20% for a weight capacity of 600kg - a load rating of 90. Generally speaking, the average car tyre is going to have a much higher load rating than you'd ever need. It's better to have something that will fail at speeds and stress levels you physically can't achieve, than have something that will fail if you nudge over 60mph with a six pack in the trunk.

my tyres can handle fast

lol. i think i should throw mine out... AFTER SOME SKIDS

my BA that i just got has the falken Z-326 Tyres wrapped around my 17'' rims

compared to my EL this thing is on skates... it just doesnt let go..

i was reaching the end of my braveness with my new car and not the limit of it

i believe i was told that passenger cars have to have Z...!

tyres have to have a minimum of 's' speed rating

re-treads I think are 140

a lot of retreads are limited to 100. My sister had one delaminate at 110 on the hume. She has had a couple of tyre related accidents. Now she buys yokohama's after I taught her the difference.

They should be able to handle up to the speed limit ... no need to go faster on public roads.

My tyres have a 94Y rating which I think is 300km, but my old EB will never go that fast...ever.

Ben

With the experiences I've had with remoulds in previous years, they're more trouble than they're worth - I've lost count on how many eggs they always developed - too dangerous IMO. I'd always limited speed to 100 with them also.
The speed rating on remoulds is usually moulded at the edge of the tread and the tyre wall. IIRC the ones I run years ago were rated around 125kmh.

I have a set of Yokie ES100's rated to 270km'ph..

ok so the tyres are there.. now I just need an engine to challenge the tyre.

outright speed mmm.

lol my tyres are 300+ rated ner ner ner

too bad your car wont ever see those speeds frank!

when I got my EA, the tyres on the side said max limit 140km/h and when I took it to 140 oneday, the steering wheel felt like it was gonna fall off.