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Crazed Please could someone.......

.....explain tyre ratings to me

The GT needs a set of boots. Rears are down to the TWI's and as Clare does lots of M Way miles we need to be safe. Fronts are OK but will do the four for the sake of the VDC.

The tyres are 225/45/ZR17 91Y (good for 186mph - it's a V6 GT).

Looking at event, the contenders are Bridgestone - 225/45 R17 [91Y] - Potenza RE050A IZ for £402.80 all in (they are standard fitments) or Continental - 225/45 R17 [91Y] - Sport Contact 3 for £384.03 all in.

Bridgestone also do a BZ version of the same tyre

What's the difference between IZ & BZ and what is the significance of the 91 bit (they do a 90, 91 & 94 to).

Evo rates the Conti just higher than the Bridgestone and as they are cheaper will probably go for these

Event tyres look good and come to you. I can then supervise the jacking so as to avoid yet more sill dents in our GT

Cheers in advance,

Simon

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Re: Please could someone.......

Hold tight Sqn, if no one beats me to it, I've an article on it, which I'll dig out.:
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Re: Please could someone.......

"All" is a bit of bold claim but I think it answers your questions:

Tyres, all you need to know
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Re: Please could someone.......

91 tyres max.load rating, varies from 62 (265kgs) up to126 (1700)

Most cars rated between 84 (500kgs) and 110 (1060.

S -111.8 mph

T-118.1 mph

U-124.3 mph

H-130.5 mph

W-167.8 mph

Y-186.4 mph

VR-130mph plus

ZR-150mph plus

IZ/BZ? no reference.:
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Re: Please could someone.......

Cheers padders & ZF

So 91,94 etc. is the load aspect?

What happens if I fit a higher load tyres then (94 instead of 91)
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Re: Please could someone.......

Quote:
Originally Posted by Squadrone Rosso View Post
What's the difference between IZ & BZ and what is the significance of the 91 bit (they do a 90, 91 & 94 to).
Can't help with the IZ/BZ bit, but the 91 is the load index, which states the maximum weight the tyre is rated to support at the maximum speed.

Tyres :: What does the writing on my tyres mean?

It's the weight per tyre, so I guess you need to take the weight of the car, then look at the front:rear weight distribution, and then take half the axle weight?

edit - beaten to it, twice.

For a given size of tyre, the sidewall will be stiffer if you get a higher load index.
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Re: Please could someone.......

ive used event tyres myself and the guy who came to me was spot on, they use airbags to jack up one side at a time,he put them under the proper jacking points, he put 4 new tyres onto new alloys in about 30min, no damage to the wheels, no gunk all over the wheels either, and automatically used the internal stick on weights, highly reccommended.
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Re: Please could someone.......

Thanks guys. I'll make the call to Event. Good to here another positive recommendation too JW
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Re: Please could someone.......

Now that airbag jacking system is the answer to a maidens prayer, to save damaging the motor? Do one that connects to the exhaust, or did advertise one,that did, or am I dreaming agin'?
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Re: Please could someone.......

I used Event last time for mine - I could safely recommend them
 
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Re: Please could someone.......

Just emailed Even to ask about the BZ IZ bit. Also asked about lifting the car as concerned about jacking / sill dents
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Re: Please could someone.......

Had a call back from a friendly chap called Mark. He'll do 4 Goodyear Eagle F1 Asymetric for £360 all in. They'll be the "extra load" variety to These tyres won the latest Evo tyre test so I guess she'll be safe on them.

FYI, they only use the airbag jacks to avoid sill / suspension damage and will fit on a Saturday if required. Will get them done one day next week

Overall, so far, so very impressed

Last edited by Squadrone Rosso; 28-01-08 at 15:41.
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Re: Please could someone.......

I'm going for new tyres on friday.Sticking with the Pirelli P Z Neros 215/45ZR17's 91Y extra load.Good price £87 all in each Just hope they use airbags to lift as i have suffered damage in the past from jacks
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Re: Please could someone.......

P Zero Nero's (19"s) on my Ti. Good grip but a tad noisy and allegedly wear really fast
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Re: Please could someone.......

Quote:
Originally Posted by Squadrone Rosso View Post
P Zero Nero's (19"s) on my Ti. Good grip but a tad noisy and allegedly wear really fast
They don't last long, have done about 10,000mi and the fronts are shot.Although now Mrs Alfie drives we use her little Fiat more
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Re: Please could someone.......

Quote:
Originally Posted by zulu ferret View Post
Now that airbag jacking system is the answer to a maidens prayer, to save damaging the motor? Do one that connects to the exhaust, or did advertise one,that did, or am I dreaming agin'?
How about this?

Last edited by filipharvey; 28-01-08 at 18:32.
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Re: Please could someone.......

Quote:
Originally Posted by Squadrone Rosso View Post
Just emailed Even to ask about the BZ IZ bit.
Did you ever find out what these ratings meant?

Edit: Never mind I've found out that these letters are part of the Bridgestone coding for the tyre. The BZ has a W rating and the IZ a Y rating.
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Re: Please could someone.......

Quote:
Originally Posted by Big Jon View Post
Did you ever find out what these ratings meant?

Edit: Never mind I've found out that these letters are part of the Bridgestone coding for the tyre. The BZ has a W rating and the IZ a Y rating.
Sorry. Yes I did but forgot to post
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Re: Please could someone.......

I've just ordered my tyres with Event as well.

Goodyear Eagle F1 GSD3's for this thursday, £145.00 all in, they came out £5 cheaper than Etyres!

Very polite and friendly on the phone.
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Re: Please could someone.......

i used EVENT when i put 17's on my 156. their service was top notch! great price and service!
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Re: Please could someone.......

Quote:
Originally Posted by Squadrone Rosso View Post
.....explain tyre ratings to me

The GT needs a set of boots. Rears are down to the TWI's and as Clare does lots of M Way miles we need to be safe. Fronts are OK but will do the four for the sake of the VDC.

The tyres are 225/45/ZR17 91Y (good for 186mph - it's a V6 GT).

Looking at event, the contenders are Bridgestone - 225/45 R17 [91Y] - Potenza RE050A IZ for £402.80 all in (they are standard fitments) or Continental - 225/45 R17 [91Y] - Sport Contact 3 for £384.03 all in.

Bridgestone also do a BZ version of the same tyre

What's the difference between IZ & BZ and what is the significance of the 91 bit (they do a 90, 91 & 94 to).

Evo rates the Conti just higher than the Bridgestone and as they are cheaper will probably go for these

Event tyres look good and come to you. I can then supervise the jacking so as to avoid yet more sill dents in our GT

Cheers in advance,
I just got four Toyo Proxes T1-R for my GT.

Bloomin brilliant. HEAPS better than the Goodyears in terms, of noise, comfort and handling.

DG
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