This is going to be 19s so from what I can gather, when the speedo reads 70mhp I'll be doing around 81 ish. Might ask Vauxhall or ABP if they can alter it or set it up.

alter the speedo urself! when i was changing my dials! i had to remove the speedo arms, and when i put them bk on, i had to follw a mate to get a rough speed! but i have 17" on now, had 15" when i did that! so god nows how fast i'm going!! just tell by the revs:lol:

it can be re-set, im sure of it, but cant remember where and how much it costs

Cheers for that. Anyone else know if it can be reset??

The website that will tell you the differences it:

http://www.chris-longhurst.com/carbibles/index.html?menu.html&tyre_bible.html

And as far as I know you can't get the speedo calibrated...... its the price you have to pay for haveng nice big alloys :)

As above basically, 19s alter the reading quite a bit- bout 15% aprox I think, IE 70mph reads as about 60mph on speedo so Im told. There is a website that tells you what the difference is.

Basically can you get the speedo calibrated to the new sized wheels so dont get caught speeding basically.??

Cheers
:thumbs: