bigger wheels

[lil3520]

IF YOU PUT BIGGER WHEELS ON CAR, THIS WILL AFFECT YOUR SPEEDO READING ?

is this correct ?

regards

ANDY

 

[RobM]

Yup, kind of....

It depends on the overall rolling radius of the wheel and tyre combination, not just the rim size itself.

If you go from, say, a 16" wheel to a 17" wheel on a lower profile tyre it is possible to keep the overall radius the same, thus not affecting your speedo.

But if you go from a 16" wheel to an 18" wheel it's much harder to do this so your speedo might be out. You'll end up on tiny thin tyres to try and match the radius which will ruin the ride.

It is possible to have your speedo calibrated though so it displays the correct speed regardless of the new wheels. That's a main dealer job though.

HTH

 

[lil3520]

i have standard 15" wheels on my leon, thinking of getting some wheels like on FR or CUPRA 17"

thanks for your reply.

regards

ANDY

 

[AndyHazza]

It will have an affect yes, have a look here to see how it will change, it isnt the best calculator out there but gives you an idea....

http://www.csgnetwork.com/tireinfo4calc.html

 

[lil3520]

It will have an affect yes, have a look here to see how it will change, it isnt the best calculator out there but gives you an idea....

http://www.csgnetwork.com/tireinfo4calc.html

cheers for info, will look at it later as wife wants to go out for lunch now

regards

ANDY

 

[Mark Anderson]

Hi,
I have gone from standard 16 inch to 18 audi TT wheels with 225 40 18 tyres and the speedo has hardly changed. Got the roadangel in with satalite speed reading and there is no real difference. The ABS is cool also with no lights on the dash. There is no catching of the rubber under the wheelarch liner either. No probs, go for it!

Mark