Advice required on tyre sizing please

Pondrew · Post by **Pondrew** » Wed Mar 02, 2022 5:47 pm

I am looking at buying a set of 666m copies (CM wheels), but am undecided whether to go for 19" OR 20". To help make the decision I want to get prices for tyres for each from my local tyre place, to see the difference in cost.
Is the 'rule of thumb' to go down a profile size for every inch larger diameter? I.E if a 19" should have 35 profile, would a 20" need a 30?
Also is there a 'rule of thumb regarding width of tyre? I.E for a 10.5" (267mm) wheel, would the correct width be 275mm, or 285mm, or what?

Any advice appreciated

brillomaster · Post by **brillomaster** » Wed Mar 02, 2022 5:54 pm

generally yes, up the diameter by an inch, drop the profile by 5. as for widths, plenty of charts on line for these things...

brillomaster · Post by **brillomaster** » Wed Mar 02, 2022 5:56 pm

this pdf has a good chart for tyre sizes.

https://www.lvvta.org.nz/documents/info ... _Guide.pdf

and something like willtheyfit.com to help calculate widths, offsets, rolling radiuses etc.

Pondrew · Post by **Pondrew** » Wed Mar 02, 2022 6:01 pm

Thanks Brillo, that's brill

B21 · Post by **B21** » Wed Mar 02, 2022 6:10 pm

What car are you fitting them to ?

Pondrew · Post by **Pondrew** » Wed Mar 02, 2022 6:13 pm

B21 wrote: ↑Wed Mar 02, 2022 6:10 pm What car are you fitting them to ?

Probably a white one..

The.Analyst · Post by **The.Analyst** » Wed Mar 02, 2022 6:24 pm

Pondrew wrote: ↑Wed Mar 02, 2022 6:13 pm
B21 wrote: ↑Wed Mar 02, 2022 6:10 pm What car are you fitting them to ?
Probably a white one..

Very helpful…

Pondrew · Post by **Pondrew** » Wed Mar 02, 2022 7:27 pm

The.Analyst wrote: ↑Wed Mar 02, 2022 6:24 pm
Pondrew wrote: ↑Wed Mar 02, 2022 6:13 pm
B21 wrote: ↑Wed Mar 02, 2022 6:10 pm What car are you fitting them to ?
Probably a white one..
Very helpful…

Thank you. I thought so

The.Analyst · Post by **The.Analyst** » Wed Mar 02, 2022 7:32 pm

Pondrew wrote: ↑Wed Mar 02, 2022 7:27 pm
The.Analyst wrote: ↑Wed Mar 02, 2022 6:24 pm
Pondrew wrote: ↑Wed Mar 02, 2022 6:13 pm
Probably a white one..
Very helpful…
Thank you. I thought so

Why do you need to s**t in this forum and act like a t**t?

Pondrew · Post by **Pondrew** » Wed Mar 02, 2022 7:34 pm

The.Analyst wrote: ↑Wed Mar 02, 2022 7:32 pm
Pondrew wrote: ↑Wed Mar 02, 2022 7:27 pm
The.Analyst wrote: ↑Wed Mar 02, 2022 6:24 pm

Very helpful…
Thank you. I thought so
Why do you need to s**t in this forum and act like a t**t?

It's what I do!
I call it a sense of humour, you should try getting one. Amazon probably sell them.

sars · Post by **sars** » Wed Mar 02, 2022 8:53 pm

Pondrew wrote: ↑Wed Mar 02, 2022 7:27 pm
The.Analyst wrote: ↑Wed Mar 02, 2022 6:24 pm
Pondrew wrote: ↑Wed Mar 02, 2022 6:13 pm
Probably a white one..
Very helpful…
Thank you. I thought so

20” on a 30 profile on the Skoda, classy

Pondrew · Post by **Pondrew** » Wed Mar 02, 2022 9:48 pm

sars wrote: ↑Wed Mar 02, 2022 8:53 pm
Pondrew wrote: ↑Wed Mar 02, 2022 7:27 pm
The.Analyst wrote: ↑Wed Mar 02, 2022 6:24 pm

Very helpful…
Thank you. I thought so
20” on a 30 profile on the Skoda, classy

I have a new business venture in mind. Drug dealer. So need the wheels to go with the whole 'thang'.

Being serious (for a moment to please Mr Anal...yst) I am actually looking at getting an F33 440i, but like the M4 comp wheels. That was the reason behind the original enquiry.

sars · Post by **sars** » Wed Mar 02, 2022 10:03 pm

Oh nice, replacing the Alpina or is it for the wife?

Pondrew · Post by **Pondrew** » Wed Mar 02, 2022 10:42 pm

sars wrote: ↑Wed Mar 02, 2022 10:03 pm Oh nice, replacing the Alpina or is it for the wife?

I was actually considering replacing the wife, but that would be far too expensive (so the lawyer tells me)

The Czech Golf is going next week, to be replaced with a Mazda 3.

Looking to consolidate cars TBH. Alp going, E89 also and replacing with the above. I really want an M4 comp vert, but the 440i makes more sense. Looking at options (again)

tiglon · Post by **tiglon** » Wed Mar 02, 2022 10:49 pm

Pondrew wrote: ↑Wed Mar 02, 2022 7:34 pm
The.Analyst wrote: ↑Wed Mar 02, 2022 7:32 pm
Pondrew wrote: ↑Wed Mar 02, 2022 7:27 pm
Thank you. I thought so
Why do you need to s**t in this forum and act like a t**t?
It's what I do!
I call it a sense of humour, you should try getting one. Amazon probably sell them.

Nope. I'm fully paid up on Amazon Prime and still no sense of humour. Also, if you could buy a sense of humour Putin wouldn't need to be such a stupid c**t.

Willtheyfit.com is useful for calculating diameter and making sure you get the right fit. 20" seems a bit much on a Z4 to me, aesthetically, but go for it if you like it

Z4-forum.com

Z4-forum.com