Spigot rings and wheel fitment

85 is an odd centrebore, best betbwpuld probably be to get someone to turn some on a lathe for you

May I ask why you want spigot rings? The only thing they are good for is making it easier to fit the wheel. If you don't mind a bit of hassle when changing a wheel I wouldn't bother with them.

Not this again..
All the spigot does is ensure the wheel is dead central while the wheel is bolted on. Some cars are bolt-centric rather than hub-centric. What holds the wheel on isn't the shear force in the bolts at all, there is only undue stress exerted on them if they are not tight enough, what holds the wheel in place is the tonnes and tonnes of clamping force creating friction between the hub face and the wheel by the bolts.
So there you go. You can get away without spigot rings on the condition the wheels aren't sleeve nut or uni-lug type.

what they all say.
the idea hubcentricity is actually a fairly new thing. it only really started happening when the majority of cars went to wheel bolts rather than studs and nuts (as a manufacturing cost-cutting exercise). its rare ot see a pre-70s car with a spigot. as noted its only to to make it easier to line up the wheel bolts. back when cars had studs, it was actually fairly rare for them to have a hub spigot as well, as the studs provided that function.

in engineering terms, the wheel bolts/studs should never see a shear force. if they do, they're not tight enough. the wheel is held on by friction between the hub face and wheel generated by the tension in the bolt/stud.

the only time you actually NEED a spigot is when the wheel isnt being centred by anything else, e.g' the taper or radius on the bolt/nut, or if you are using wobble bolts. still, it didnt stop quite a few manufacturers both OE and aftermarket specifying sleeve nuts with no centre spigot...i guess they though that as its studs by the time youd got 4 or 5 nuts on any play left would be so small it wouldnt effect balance.

there is also quite a few notable examples of cars that have neither studs nor a hub spigot. like pretty much every aircooled VW ever made... and they made *quite* a few of those without the wheels falling off.

In that case Dez, is there no issue running those cheaper non hub centric spacers over the more expensive hub centric ones?

As the subject is being discussed can I ask a related technical question please? Yes, OK thanks...

I fitted Peugeot 205 GTi wheels to my Porsche 924. The original Porsche wheels used radius seat bolts and center spigot mounting too. The after market alloys I was replacing used 60 degree taper bolts but no spigot rings used, these were just centering on the taper bolts. The Peugeot wheels use flat seat shank bolts when fitted to a Peugeot, to fit them on the Porsche I fitted some adapters in the flat seat bolt holes to allow use of 60 degree taper bolts. I also used spigot rings as the wheels had already been machined to take them.

So my question is; did I really need to use spigot rings? The potential problem is that adapters may have a TINY bit of lateral slack/inaccuracy as they aren't a machine fit, but apart from that the taper bolts will center the wheel up. Do you think that this fitting would center the wheel accurately enough without using a spigot ring? It would mean I could run another set of Peugeot/Citroen wheels which don't have the recess for spigot rings.

-Steve-

PS. These pictures may help to understand the adapter/inserts I used to fit the taper bolts...

Assuming they're a reasonably tight fit in the holes you'll be fine without spigots.

Out of interest where are they from and what size is the shank? A set of those might solve some issues I have with missing seats on some wheels I have.