Motoring Solicitor

[rover220]

So if I’m running 20” on my t5. How much difference is the speedo out.

Let me just consult the crystal ball

 

[oldiebut goodie]

Here, borrow mine!

 

[Shredder]

So if I’m running 20” on my t5. How much difference is the speedo out.

Use https://www.willtheyfit.com/ to approximate for you (other useful data is shown too) when choosing wheels and tyres. Then download a GPS Speedo onto your phone and compare that reading with your speedo after you've fitted your new wheel / tyre set up. Bear in mind the website calculates based on your speedo being accurate but apparently (as has already been stated) manufacturer speedos have to read under a bit (EU Law) to ensure no one can use it as an excuse for speeding. I have been told the average on a T6 speedo is 5% under actual