will these tyres throw out my speedo

**vauxaidy** · 29-06-2005 19:57

just fitted some 17" momo wheels with 215/45/17 tyres will they affect the speedo or will it still read right

**Rob** · 29-06-2005 20:09

What is the standard tyre size?

**vauxaidy** · 29-06-2005 20:14

195/60/15 were on gsi rims these are 215/45/17 on 7.5*17 momo wheels

**Rob** · 29-06-2005 20:17

About 6% bigger now so you'll be showing slower than you are actually doing. When you are showing 60, you'll be doing 63.6.

**vauxaidy** · 29-06-2005 20:26

cheers mate thanks for the help just didnt want to get caught out speeding as i drive for a living and already have six points

**Rob** · 29-06-2005 20:30

And we all know points do not win prizes!!

Just got to be careful when you are showing 65. Could get a big slap on the wrists for that.

**vauxaidy** · 29-06-2005 20:36

tell me about it i'll have to keep a closer eye on my speed now but at least my car looks better

**Mark T** · 29-06-2005 20:56

1.67% bigger, not worth worrying about.

Your speedo will bit a bit closer to real speed.

**Rob** · 29-06-2005 21:20

I got 5.93%.....??!!

**Mark T** · 29-06-2005 21:28

try again

**Mark T** · 29-06-2005 21:30

**Rob** · 29-06-2005 22:48

My mistake. Apologies for the wrong solution.

Thread: will these tyres throw out my speedo