One week in a VECTRA CDXI

[Jerram]

i wish it was 89, then i could go 215/40
so i wouldnt scrub as much

I'm 215/40...?

[nuggz]

I'm 215/40...?

215/40/18

215/40/17 is a bit small for the vec aint it??

[McTwistie]

Well, I have spent the last 90 Minutes reading threads from here and Veccy-c about tyres. All about size, weight, speed rating and brands.

It's a fascinating subject, and thanks to all you guys who posted about this previously, seems you really know your stuff.

There are some nice Mags for sale out there, but I can't afford the rubber, if you know what I mean.

Cheers

[Jerram]

215/40/18

215/40/17 is a bit small for the vec aint it??

5mm too small I believe (the guy who used to own a vec, now has an audi 1.8t suggested that (can't remember his handle))

mind you if the proper size for vecs is a 45 profile for 17" that would mean that 40s with 18s would be something like 25mm too big? That'd scrub fo sho wouldn't it? Also your speedo would be significantly (like 7%+) out and your 0-100 would probably be slower due to the larger rims acting like a taller gearing

[nuggz]

5mm too small I believe (the guy who used to own a vec, now has an audi 1.8t suggested that (can't remember his handle))

mind you if the proper size for vecs is a 45 profile for 17" that would mean that 40s with 18s would be something like 25mm too big? That'd scrub fo sho wouldn't it? Also your speedo would be significantly (like 7%+) out and your 0-100 would probably be slower due to the larger rims acting like a taller gearing

http://www.miata.net/garage/tirecalc.html

difference between 215/45/17 and 225/40/18
is 1.9%
100kph -> 102
not much difference

[stevedee3]

Tyre size is very easy for a dealer to change...