Help please Tyres

[cloggy]

Chimaera 4l Estorils alloys.

The Bible says;

225-50 R15 on front
225-50 R16 on rear

Z rated.

Five years ago I had Toyo's T1R fitted but could not get z rated for front so had V rated (no problem with insurance company)

I am speaking to 3 tyre places and so far have found front T1r's but not rears.

What else can I fit or what other sizes without problems.
Must be road tyres not track, not looking for cheapest option just need new tyres, preferably same brand all around.

Thanks in advance for your help.

[Colin RedGriff]

Are you sure about those rear sizes???

Mine are 245/45/16 I've just bought a pair of Toyos in that size from Black Circle Tyres

[Oggs]

Fronts are usually 205 55 15.
205 60 15 for early non pas cars.

[Colin RedGriff]

Try this for compatible sizes but I think the 245/45/16 size would be OK for you

http://tire-size-conversion.com/tyre-size-calculat...

[QBee]

My 99 Chim was 205/55 15 front and 225/50 16 rear. Gives a 25mm rolling diameter difference front to rear.

[citizen smith]

400/450 Chim has 205/55 x 15 front ZR rated for all sizes
225/50 x 16 rear

early cars had 205/60 x 15 on front.



500 Chim with PAS has 225/50 x 15 front
245/45 x 16 rear

It is hard to find ZR,s for the fronts, but if you tell your ins. broker that you have fitted VR then usually they say O.K. but don't quote me on that!

[cloggy]

Oggs said:

Fronts are usually 205 55 15.
205 60 15 for early non pas cars.

Sorry forgot to state mine is a 1999 and has PAS.

Edited by cloggy on Friday 7th March 08:38

[Oggs]

cloggy said:

Oggs said:

Fronts are usually 205 55 15.
205 60 15 for early non pas cars.

Sorry forgot to state mine is a 1999 and has PAS.

Edited by cloggy on Friday 7th March 08:38

I don't think that 225 50 15 is standard size for the front.

[900T-R]

Should be 205/55/15 front and 225/50/16 rear then. I can heartily recommend Bridgestone Potenza RE002 Adrenalin, which conveniently come in the correct speed rating (W) for both front and rear.

Edited by 900T-R on Friday 7th March 09:28

[Oggs]

205 rear?

[900T-R]

Oggs said:

205 rear?

Sorry, was trying to multitask and as we all know that could only end badly... 225/50/16 of course, post above amended accordingly.

[Oggs]

[cloggy]

900T-R said:

Should be 205/55/15 front and 225/50/16 rear then. I can heartily recommend Bridgestone Potenza RE002 Adrenalin, which conveniently come in the correct speed rating (W) for both front and rear.

Edited by 900T-R on Friday 7th March 09:28

There is no W rated Eric. do you mean Z rated?
(o/t will probably be on DSR in May, will you be there?)

Klaas

[A900ss]

[quote=900T-R]Should be 205/55/15 front and 225/50/16 rear then. I can heartily recommend Bridgestone Potenza RE002 Adrenalin

quote]


The sizes above are correct and I can recommend Uniroyal Rainsport 3's as an alternative view for road use.

Good luck

[cloggy]

Thank guys.

[900T-R]

cloggy said:

There is no W rated Eric. do you mean Z rated?
(o/t will probably be on DSR in May, will you be there?)

Klaas

Yes there is, and have been for the past decade and a half...

In de old days, there was only 'Z' which meant any speed rating over 240 km/h (149 mph). Of course, with modern performance cars getting faster all the time this became a bit imprecise, so now we have the 'W' (up to 270 km/h) and Y ( up to 300 km/h) categories.

Sometimes the 'old' and 'new' designations are being used together, eg. 205/55ZR15W - the letter W or Y further specifies the generic 'over 240 km/h' speed rating down to 270 or 300 km/h max speed.

[QBee]

Can someone please explain why we need tyres rated for over 149 mph, or even higher for a Chimaera that is only driven on the road and in the UK? Are the insurers saying that they are insuring us for driving at those speeds? Or am I missing something?

[900T-R]

1) Why would you willingly make the safety margins even smaller on a high performance car?

2) Even the v6 S models had V-rated tyres specified even though their top speed fell within the limits for the H rating (just). The reason is that what makes a tyre withstand high speeds, is also what keeps it from being torn to shreds at high acceleration from, and because the S at less than 7s 0-60 was considered to be a very accelerative car in its time and in relatino to its top speed, V-rated tyres were specified.

As a rule of thumb you can assume the construction of the higher speed rated tyre wil also be more fitting for high performance driving.

Tyres for Chimaeras and Griffiths are dirt cheap - as long as you can get them - anyway compared to other (more modern) cars of similar performance. I see no valid reason to go for anything less than the best (road biased) tyres available.

[QBee]

100% good response