Alloy wheel size, offset, tyres...

[Cliff]

Hi

I am going to put some 17's on my Cliff (I still want some kind of ride comfort with where I live so anything bigger is out). Cliff is lowered out of the factory, same as the DTM I think (30mm?) - I absolutely don't want any rubbing or other hassles.

I currently have 205 55 16s (BBS) so I was thinking 205 40 17s - right size given the rim size increase? 205 or 215?

And for offset, I know GM have a high offset, highest I can get in the wheel design I am looking at is 42 - should be OK though I assume, low mileage per year anyhow - right?

Cheers
Andrew

[Callyman]

Think 215/40/17
Will give closer diameter/rolling circumference etc.

Good website to compare

Google 'willtheyfit'

[rich30mex]

Google 'willtheyfit'

Just curious Andy how did you come across that web site

[MarkV6]

Might be a bit late but this is a very informative website

http://www.carbibles.com/tyre_bible_pg4.html

has a nifty tyre size calculator about 2/3 way down the page too.

[Cliff]

Never too late, someone else will need the info at some point - thx!


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[EddeyDancer]

I am going to put some 17's on my Cliff (I still want some kind of ride comfort with where I live so anything bigger is out).
I currently have 205 55 16s (BBS) so I was thinking 205 40 17s - right size given the rim size increase? 205 or 215?
And for offset, the wheel design I am looking at is 42 - should be OK

I've previously fitted, on ET40 wheels, I suggest tyre size of 205/45R17 with the option of fitting 225/45R17 on the Rear
Tyres of a 40 profile will give You a harsh ride, as well as looking too small for a Calibra on 17 inch wheels...

[JcSE6]

Know it's a long time ago, but did you change those wheels in the end?

Going through the same research now, was wondering what you're experience was if you had. Looking at a set of 7j x 17 ET40 Pro Race 1.2 with 205/45/17s on mine.

[Cliff]

Hi there

Yes, I did go ahead and change them.

In the end I bought Wolfrace Wheels Assassin Alloy Wheel 17x7 Inch ET42 5x110 and paired them with 215 40 17” tyres. They worked out great, no regrets.

Hope that helps.
Andrew

[JcSE6]

Thanks Andrew.

Helps a great deal haha. Looks like these wheels should push out about 2mm more than what you've got, which should be nothing to worry about I hope, even with the 30mm lowering I want to do at a later date.

Appreciate the info!

Jack