hey there,
Does anyone know if the wheel bolts on all/most fiat cars are the same? (M12 x 1.25) i.e. puntos, 500's, old and new etc.
Got some new (fiat) alloys on their way to me for my Mk1 75sx N reg, and wondering if the current bolts, and any locking wheel nuts i might buy, will be the correct size.

Cheers in advance
:worship:

the wheels don't effect the thread size....

Your existing bolts should do unless you are replacing steel wheels with alloys in which case you will need longer bolts with same thread, or if you need spacers to fit these new wheels then the bolts will need to be longer as well.

thanks for the quick reply,
yeah sorry should have said 'length' rather than 'size', i do have steelies on at the moment, so they might be too short? that's was what i feared :/.

the 'M12 x 1.25' measurement of bolts does not include the length i assume? i found out the M is for medium offset, are the 12 and 1.25 diameter and thread size?

usually quite thorough in my research before i purchase anything but overlooked this rather important factor lol

yes 12 and 1.25 and the thread width and thread pitch. The alloy is clearly thicker than a steel wheel so bolts are longer.

How long your bolts need to be depends on whether the wheels will fit straight on or if they need spacers, as again clearly if you have spacers the bolts need to be longer to accommodate that as well. To know whether they need spacers requires more wheel details. Need to know width (often referred to as j) and offset (referred to as ET) to establish whether they fit further in or out than the original wheels.

No - M12 means Metric 12mm, not 'medium' anything.

thanks for all the help guys, really appreciated.
they are genuine Fiat alloys off a later model punto, i think Mk3, size 165/70/R14. I assume they will not need spacers since they are stock fiat alloys, but maybe i'm wrong?

FIAT used a variety of offsets, so assume nothing. The ET will be stamped somewhere on the wheel -- compare it to the ET on the steelies and get back.

You'll need longer bolts in any case.

ah ok thanks, will report back when i get home in the next week or 2 (at uni at the moment doing exams, Fiatforum and ebay proving great outlets for procrastination lol)

bought this set of wheel bolts + some locking ones, should hopefully do the trick.
(am i allowed to link stuff here?)
http://www.ebay.co.uk/itm/140974112223?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Will report back when they arrive and I get a chance to replace the wheels.
Cheers again for all the help.

Those wheel bolts won't fit, they have a 60 degree seat not radius seat for oem fitment

haha well they've been on the car for about a year and a half, had no trouble so they must do the trick