Manage to get original fiat multipla alloys and I am just wondering of I could use the bolts off my steel wheels for them or dog they have to be longer or bigger shoulders ass I donte want the bolts to rip into the alloys. Thanks in advance

On other cars of mine they have been the same.

If your old bolts are 'flanged' as in like a flat washer as part of the bolt they nay not work with alloys. If your old bolts have a 60 degree radius they may work with alloys if they are the correct length.

Multipla wheels are hubcentric anyway so you may need to fit spacers to get the alloys on anyway.

- Hubcentric - means that the wheel relies on its centering at the hub
- lugcentric - wheels rely on fastener alignment alone.

Measure, measure, measure.

If the new wheels are thicker than the old ones (and it's hard to see them being thinner) you'll need longer bolts.

Consider a stud conversion.