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TT wheels on A4?


Jacob7878
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Hi all,

Not massively familiar with wheel fitment and wanted some advice, I have an A4 B7 with 17” wheels at the moment.

Looking for some slightly larger/nicer wheels and have found some 18” from an Audi TT (2011). 
The PCD both seem to be 5x112 but was hoping someone may have had experience doing this swap or know if there would be any other issues?

Edited by Jacob7878
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Hello Jacob,

Welcome and thanks for joining.

Although the 18 inch wheels you prefer would probably fit your car, it’s not quite as simple as this, since the tyre profile would have to decrease to ensure the dia. of 18 inch wheel + tyre, remains the same as your current 17 inch, otherwise it will affect the gearing etc. 

I used to work these out for members, but now simply suggest referring to websites which supply wheels, where you should find a calculator to input current tyre widths and profiles, then it works out what profile you will need for the increased diameter wheel.

Once you have that information, it would be well worth checking on tyre prices - demand and availability may make them a lot more expensive than your current size - or indeed cheaper, but doing homework before committing avoids surprises. 
Perhaps you could let us know what you find out Jacob.

Kind regards,

Gareth. 

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