how to tell if an alloy is 5x100 or 5x114?

[lanceuppercut]

say you have a mystery alloy, how do you find out if its 5x100 or 5x114? any markings i should be looking out for? on the underside there is: 18x7.5J ET45

[richiewong]

Well obviously it's an 18" wheel and 7 1/2" wide with an offset of 45mm.

To measure it's PCD try:
http://www.towingandtrailers.co.uk/s.../165/index.htm

Rule of thumb, classics, bug and early blobs are 5x100, it was around MY05 that the 114PCD came out on the STi's

[tubbytommy]

Originally Posted by richiewong

Well obviously it's an 18" wheel and 7 1/2" wide with an offset of 45mm.

To measure it's PCD try:
http://www.towingandtrailers.co.uk/s.../165/index.htm

Rule of thumb, classics, bug and early blobs are 5x100, it was around MY05 that the 114PCD came out on the STi's

but hawk wrxs are still 100 pcd

[RRP1STI]

Measure from the centre of one of the bolt holes to the centre of the centre bore,if it is 50 mm,its a 5x100,if it measures 57 mm,its a 5x114,hope this helps

[lanceuppercut]

Originally Posted by richiewong

Rule of thumb, classics, bug and early blobs are 5x100, it was around MY05 that the 114PCD came out on the STi's

i try and go by that, but the situation is that i recently checked my spare, the tyre was knackered and alloy a bit on the rough side, i should've checked sooner after buying the car tbh.

so its more for my own peace of mind because if the previous owner didn't care about the condition of the spare, i just wanted to make sure the thing would go on properly in the first place! ..hence asking about checking for the correct PCD.

[alcazar]

Jack it up, remove one wheel and try it?

But SURELY you wouldn't use that thing you showed us yesterday?

[lanceuppercut]

Originally Posted by alcazar

But SURELY you wouldn't use that thing you showed us yesterday?

going to be honest, I am but obviously with new rubber. it is only to be a spare so if I got a puncture all I need it for is to get me to a garage to swap the rubber over.

[alcazar]

Wow.....that wheel has had such a clout, I'd be worried about it cracking.

[lanceuppercut]

i'm looking at the space saver route now, my initial reasoning for the mangled spare was it only ever going to be used as a very short term stop gap to drive and get the punctured tyre replaced, as it was damaged and the wrong colour anyway.

but that got me thinking that i might look at space savers (it would only be used long enough to get to a tyre place and plus it saves a bit of weight too) but that might need unnecessary switching unless space savers have enough clearance for standard 4 pot fronts?

any issues (apart from the obvious: take it easy) if using 18's and probably what will be a 16" space saver?

i would like a full sized spare though but there are hardly any around, its either sets of 4 or nothing