[TTDegs]

Originally Posted by JonTypeS

Yeah dont get 20’s. I remember when the Stig first test drove the type on Top Gear he was amazed at how good it was, and even made the point that the 19’s that were available would probably ruin the handling.

Oh and in answer to Wooly rest assured your tape is fine as I found this on the Web

Wheel Sizes:
Alloy wheel sizing is generally a simply science, width and diameter. All alloy wheels have 2 main measurements these are always shown in imperial sizes as inches and also tend to always be written in the same way. If you look on the Race and Road website or on an actual alloy wheel you will see the following example of measurement 7.5x17”.

The first is the measurement of the wheels width. The width of an alloy wheel is measured from the inside of the rim where the tyre fits the wheel. So if you measure a 7.0” wheel from outside edge to outside edge you will find it measure 8.0”, but if you measure from bead seat to bead seat, where the tyre sits, you will see it measures 7.0”.

The second is the measurement of the wheels diameter. Again the measurement can be deceiving is you were to measure a 17” alloy wheel on the outside from its furthest point to point it will measure around 18”. As with the width of the wheel the diameter is measured from the points at which the tyre sits on the wheel.

shows what I know!

cheers Jon