i think these are from a Audi A6 

they are 112x5 is not the only measurement i need to know about?

Can some one please educate me.. 

Thanks

x

iirc audi use a bigger centre bore

Well...

 

When you say 'these wheels', there is no 'these' there. I think you intended a link,

 

You need the diameter, Whatever diameter you think is appropriate. you need to get tyres of the right sidewall height to get the right rolling radius. Conventionally, people go for roughly the same RR as standard, so the speedo reading is unaffected.

 

You need the 'J' dimension (inches, between the two fitting positions on the rim). This determines how wide a tyre fits. Usually, it is best to use something that was an original fitment to the car, as going too narrow reduces grip, and going too wide can induce sudden breakaway. 

 

Then there is the ET. this is the amount that the centre-line of the wheel is inset from the mounting face. You should stick to a value that is used originally on the car. If you go to a seller of wheels, they'll tell you it is all about whether the tyres foul on the bodywork, but this is only part of the story. There are some odd conditions where having wheels too far out can reduce your ability to control the car (split mu surfaces, for example). For that reason, ET should be in the range originally used, or within a few mm.

 

You can find websites that will help you tell whether the wheels will fit (will they fit). A site like will they fit also allows you to check speedo error.