I know this has probably been asked a million times before but i don't semm to be able to find the right answer when i do a search.

I'm lookng at buying some alloys for my MK , lookng at 15". What offset do i need and what width tyres? All standard wings etc etc, sierra running gear.

Cheers in advance
Adam

7" wide rims et35 should do the trick
LINK

[Edited on 29/4/08 by eccsmk]

[Edited on 29/4/08 by eccsmk]

your MK build manual states 15x6.5J ET38(offset 38mm). They spec tyres as 195x50x15. At least thats what the most current one says, although I've seen one which says 15x6J ET 38, but it's form an older version of the build guide.

To go wider than recomended means that the outside edge of the wheel could protrude outside the wings, if you have enough backspace then you can restore the correct outside edge position by increasing the ET by half the extra wheel width, i.e +13mm(1/2 inch) increase ET from 38 to 45.
Big problem with Sierra based running gear is the large ET built in, you can always get bigger front wings but often the rears need modifying.

I have these if you like:
http://www.locostbuilders.co.uk/viewthread.php?tid=88640

However won't pass SVA if that's what you need them for as the spokes are shaped behond arches.
Cheers
Eddie
PS Anyone know what offset I need for 13" 6J ?

I fitted 195 tyres on ET38 alloys and they fill the rear arches nicely.

Hope that helps
Nigel