ALFAGTV6.COM

Mats · Post by **Mats** » Thu Apr 06, 2006 2:53 am

630mm? In what width?

Micke · Post by **Micke** » Thu Apr 06, 2006 3:21 am

Whatever you feel appropriate!

I.e. 225 mm

Post by **Zamani** » Thu Apr 06, 2006 8:21 am

Micke,

Can you explain the measurements on race tires? The profile part is a little strange. No 40,50,55 series, more like 610 etc.

Micke · Post by **Micke** » Thu Apr 06, 2006 9:02 am

The dimensioning is different as you noticed.

Width (TREAD not maximum) / Tire Diameter - Rim diameter
First two measures can be mm, cm or in for some extra confusion. Rim is always inch.

So 205/50R15 would be about 160/590R15.

Mats · Post by **Mats** » Thu Apr 06, 2006 9:27 am

In my experience all the "race" rubber (i.e. A032R, 540S and such) always measure tread width.

I must say I find it difficult to believe you can fit a 225/630 in a GTV without cutting metal. (Unless you make it really high).

Micke · Post by **Micke** » Thu Apr 06, 2006 11:43 am

If the size is given in the "street way" the width is maximum section (also A032, A048). If it's in the racing form it's the tread.

Some sizes:
http://www.yokohama-motorsport.de/conte ... &Itemid=26
http://www.yokohama-motorsport.de/conte ... &Itemid=27

A 225/630 might be tight as it could be 240 wide but 225/50R16 (63 cm OD) is not a problem in mine anyway. And yes, it is low, and yes, I've given it a couple of rounds with Mr. Sledgehammer.
In the rear you can fit almost anything.