Black VX SS
20" wheels and spedo
Hi guys, just got 20" wheels put on my vx ss and it feels like the car is goin faster than 60 when i sit on 60 by the spedo. Could it be out.
Slayer of Stupid Threads
What profile tyres are on it?
Chances are its out. However, when I went from 18 to 20's mine actually dropped about 3k's.
Black VX SS
Slayer of Stupid Threads
You might be ok. Just grab a phone and download a speedometer type program.
Same as above sort of thing
Try using a gps and looking at the speedo on that, see if there is a variation from your speedo that will tell you
That's what my vy has on it and it's out by 2-3 km/h at 100km/h. So you would t notice it at 60k's. I think ya mind is playing tricks on you
Moderator Puppeh
Use Google and search for miata.net tire size, you should be able to work it out from there.
my VY has 20's on it too and its out by 2-3kph at 100 as well
245/30R20 is the correct tyre size for a VY, the difference in rolling diameter from the stock size to the 20" size isn't so bad.
My VY Berlina Build Thread - Mainly Stereo
http://forums.justcommodores.com.au/...ure-heavy.htmlOriginally Posted by xVisions
Mucca Mad Boys
easiest way to tell is borrow or use your gps
SSM11K
My VY was 5% out, can get it reprogrammed to suit, either Holden, or someone handy, with the right tools - Phreddy, if you use a GPS make sure its on flat ground, apparently they can't work out if you're going up a hill so it thinks you're going slower than you really are
Donating Member
"Success is the ability to go from one failure to another with no loss of enthusiasm" Sir Winston Churchill.
My VS II Berlina Wagon
MY12 II SV6 Sportwagon
Well i got 225/35/20 on mine, (being a larger profile, i'm doing 103kph when it displays 100kph), you've got the right size so you should be fine.
Calais man
20's with correct tyres make little or no differnce, use a GPS to check your speed, my car was doing 50km when the speedo read 57km after I changed the diff and was 25km out at 100km/ph just check it with a GPS and if your that worried next time you buy tyre get the correct size. Speak to your local tyre shop if the tyre cal. app's dont make any sense.
225/35/20 or 245/30/20 are two acceptable and legal sizes.
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