what size wheel spacers do i need ;so i can fit fiat coupe 16 inch 205/50/16 wheels to my multipla at the moment using 185/65/15 many thanks kate my multi is a 2003 jdt

You need to know the ET of the wheels first. And that the bigger the ET, the closer the wheel sits to the centre line of the car. So, if the ET of the new wheels is bigger, you use spacers to make up the difference. If the ET is smaller, you're pretty much screwed.

The safe way to do it is to use the ET of the old wheels as a gold standard to stick to -- this prevents horrible geometry changes which can, at the extreme, have you in a ditch in the blink of an eye.

Another way is to buy a stack of washers and use these to pad the wheels out until it all fits. You absolutely must not run the car in this condition, it's for measuring only.

Please don't use nasty "universal" spacers, get decent ones with the right PCD and counter bore, hubcentrics if over 10mm.

A stud conversion will be a better idea than longer bolts, especially with wheels that big unless you have majic muscles.

Multiplas do look good with bigger wheels and tyres.

my offset is 38 and the new ones are 43

does this mean i need 5mm spacers ?

Look here: http://www.driverstechnology.co.uk/wheel-offset.htm

You will note that offset can be positive or negative. With your 38mm offset then this means that the centre line of the wheel is +38mm from the nave/mount face of the wheel.

Offset increase for three primary reasons

1) to allow the spokes of the wheel to clear the brake calipers and any other mechanical obstusions into the wheel rotation area

2) to increase track width

3) allow wider wheels to be fitted

On face value you *may" require a 5mm spacer. It will depend on tyre and rim sizes and current running clearances on your existing rims & tyres. Also on the size, shape and rake of the wheel spokes into the back of the wheel.

thanks for all he reply's they have all been very helpful ;;;;

the wheels i hope to put on my multipla are the fiat coupe blade alloy wheels they are 205/50/16 with an offset of 43

Basically they're 20mm wider with a 10mm smaller diameter, so test fit them without spacers and trying turning the steering from side to side (with the wheels on the ground) to see if they catch anywhere. If they don't you should be OK but keep a listen out for anything that sounds like rubbing, if they do look like they're going to catch then you'll probably need spacers and 5mm would be the ones to go for.

thanks to all the people who replied to my post this forum has been very helpful ;;cheers Kate

Pop up a photo when you've done it. Should look great!

will put up pictures when done many thanks all ;;