Can you recalibrate your speedo

[coolspot007007]

Can you reclibrate your speedo, as ive got different profile tyres on standard alloys at the moment and my car seems to be reading 10% above the actual speed.

 

[Rich-D]

Err... how the hell can you have got it 10% out?!

You must have gone from tiny wheels/tyres to huge wheels with not particularly low profile tyres on.

What were the originals and what are they now?!

Take a look here >>>

http://www.miata.net/garage/tirecalc.html


This will work it out for you...

 

[BRUN]

well mines 2% out now, its reading too slow, im goin faster than it shows !

 

[coolspot007007]

The tyres went from 185/55/r15 to 195/45/515 on ph2 rims, it says about 5% out but from the people overtaking me yeaterday in a 50 zone on the motorway id say its more like 7-10%

 

[coolspot007007]

195/45/R15 sorry

 

[BRUN]

well m8, even in the digital camera zones people still tend to do slightly over, like 55 in the 50 etc

plus when we were tryin it yesterday, it would seem like 7% cos mine is 2% out too but the other way

say it says 60 on mine and on yours, then im doin 62 and your doin 57, but if you pace me then yours will probably read 55

 

[coolspot007007]

you got to get a different gear apparently, so instead im getting new wheels so i can have the right rolling radius again

 

[Mav]

Bigger wheels make you read slower on the clock than your actually going, not faster. Always handy in keeping the milage down on the clock

If you really want something to accurately give you your speed just go out and buy a cycle computer and attach it to your rear wheel. They work fine up to about 250mph.

 

[Daz]

yea, You can get your speedo calibrated. The place which converted my rev counter to work with my ignition system do it apparently.

Ill think about having it done when I get bigger wheels I think.

Daz.