What size boots do you have on?

[tigerleo62]

Hi, I was wondering what size tyre/wheel combination you guys have employed for your Stagea and how it affected the ride/handling (if any) when using stock springs and struts (if applicable).

I was calculating the change in relative speed to the speedo when choosing different tyre/wheel combinations and came up with the following chart:

W = tyre width in mm

Ra = tyre wall height to width ratio

R = wheel diameter in inches

H = tyre wall height based on Ra

D = approximate tyre diameter in mm

% = percentage of tyre diameter compared to stock (in orange)

60 = real speed when speedo reads 60 kmh

100 = real speed when speedo reads 100 kmh

W	Ra	R	H	D	%	60	100

[COLOR=DarkOrange]205	55	16	113	631.9	100	60	100[/COLOR]

225	50	16	113	631.4	99.92	59.95	99.92

205	40	17	82	595.8	94.29	56.57	94.29

215	40	17	86	603.8	95.55	57.33	95.55

225	45	17	101	634.3	100.38	60.23	100.38

235	45	17	106	643.3	101.80	61.08	101.80

225	45	18	101	659.7	104.40	62.64	104.40

225	40	18	90	637.2	100.84	60.50	100.84

225	35	18	79	614.7	97.28	58.37	97.28

235	40	18	94	645.2	102.10	61.26	102.10

245	40	18	98	653.2	103.37	62.02	103.37

255	35	18	89	635.7	100.60	60.36	100.60

265	35	18	93	642.7	101.71	61.03	101.71

235	35	19	82	647.1	102.41	61.44	102.41

255	40	19	102	686.6	108.66	65.19	108.66

Anyhow, made me curious as to what tyre/wheel combinations peoples were choosing, and what your thoughts are about the combination(s) you have chosen.

Cheers

[SafT]

we have a couple on 235 45 17's

[Jay95R33]

Yepp, that's what I have on mine too. 235/45/17's

But one thing to remember, one brand tyre is usually a different size compared to another, even if they say they are the same size..

I found the ride to be a slight bit firmer compared the the 235/50/16's that I had on before, but not a massive difference.

J

[tigerleo62]

Yepp, that's what I have on mine too.  235/45/17's

But one thing to remember, one brand tyre is usually a different size compared to another, even if they say they are the same size..  

I found the ride to be a slight bit firmer compared the the 235/50/16's that I had on before, but not a massive difference.

J

That's interesting - that's a fair difference in profile I would have thought - about 12mm by my calculation...

W235 Ra50 R16 H118 D641.4 %101.50 kmh60.90 kmh101.50

perhaps I need to be aiming at a lower profile than I thought...

Cheers

[ICE12]

Mine came with 225/40ZR18 all round would like to go a little wider when ready for new ones maybe 245 or 255. As they were already on the car I can't tell you what difference it makes.

ICE

[tigerleo62]

Mine came with 225/40ZR18 all round would like to go a little wider when ready for new ones maybe 245 or 255.  As they were already on the car I can't tell you what difference it makes.

 ICE

The ride doesn't feel too harsh? I was thinking of going with 225/40R18, but was worried about feeling every bump on the road and tyre noise...

What makes you want to go wider?

Cheers

[ICE12]

I have standed suspension so the ride feels good and it covers the bumps well. I want to go wider as on 18's they look a little narrow and a bit more rubber on the road would be good.

Cheers ICE

[tigerleo62]

Thanks Ice - I am getting some 235/40/18 fitted on Friday at C-Red tuning (bottom right corner of this link AVS Model 5's: http://www.c-red.com.au/parts/wheels.shtml )

They will also do the sway bars and stuff to tighten up the steering as well. Will look at struts and springs after that if necessary.

Thanks for the info

[Terminal]

I've got the stock rims still, 225/50/16, and also stock suspension. i definately need some wider tyres and suspension work, it rolls a lot.