My Eunos Mk1 V-Spec just sailed through its MOT although was cruising along the Motorway and noticed a bit of a wobble through the car/steering wheel when going between certain speeds and hitting a bump. Never really notice it before.
Thought it may be the balancing on the rear passenger wheel as I had a new tyre put on for MOT and it was not balanced on a machine.
Took the car to Kwik Fit to balance the wheel and they revealed that it appears my alloys are missing spigot rings which is resulting in said wobble! I am now bricking it in case the studs on my wheels fail.
I am running some 15" Cosmic alloys which were on when I got car last year and I am thinking that spigot rings were never fitted as one of the wheels removed at the garage has never been off the car since I bought it…
Is there a certain type of spigot ring that I can get for my Eunos, I dont have a clue about these things!
In the 5 years I’ve been using my MX5 on track I’ve never had spigot rings. They are just there to locate the wheel as you bolt it up. They take zero load (they are only little bits of plastic).
All of the load in the joint is transfered via friction generated by the bolt clamp load. Not having spigot rings will not cause your studs to fail as the studs are not loaded in shear (unless the nuts are loose).
You can locate the wheels perfectly well by gradually tightening the nuts in the usual sequence - the taper on the nuts is self-centring. Banging them on with an airgun can lead to them not seating properly if there are no spigot rings.
You can buy spigot rings from most places that sell wheels, although they will need the wheel off to measure the spigot recess in the wheel. They’ll be a few quid each, which is cheap for the peace of mind they can bring. But I don’t use them.
The inner diameter (ID) for my spiggot rings on my Mk1 Eunos was 54.1. This is the size I needed to fit on the hub part of the Mazda.The Outer diameter (OD) will depend on the wheel.
As an example, on my Rota JSPL wheels, I purchased OD 67.1 - ID 54.1, but when I then changed to Rota RB wheels, the OD was different again! I just ordered up three sets in the end
to cover myself as I was desperate to fit the wheels lol.
I have 2 sets of spiggots going spare here that I can send and you can try if you like.You may get lucky and they may fit, but there are so many different types, they also may not.Either way,
the ID was 54.1 for me and if you look at the back of your wheel and measure how big the hole is, that will give you the OD, so you will likely need OD xxx and ID 54.1.That’s assuming
all Eunos models are the same, of course.
I rang several local alloy wheel places to get them, but many didn’t sell them believe it or not.Halfords could get them in, though, but I ended up getting mine from here…
As has been said, most wheel retailers stock spigot rings. If you’re having trouble sourcing them, a local engineering firm could probably make some metal ones up for you. Or Bimecc are a company that supply most spigot rings to retailers. 01923 855234 the inner diameter is 54.1 I believe the outer diameter may be 65.1 on your wheels, but you’re best off measuring it yourself.
Yes the centrebore on the mk1 hub is definitely 54.1mm but you need to take a wheel off to measure the bore on it. It is the circular rim inside the four stud holes and will be somewhere between 54.1 and about 70mm approximately. You can measure it with a steel rule but a caliper is better (like a dividers from a geometry set). When you’ve worked out the measurement you can get them from ebay - search for spigot rings MX5 - I paid about £10 for 4.
O.D. is 73.6mm on some aftermarket alloys that I have. The spigot rings are only made of plastic and will not stop your wheels from wobbling. Make sure that you have the correct wheel nut profile for your wheels and torque the wheel nuts evenly to 75ftlb. If this does not cure it then check the ball joints for wear.
I bought a set of spigot rings on eBay for £4.95! This was when I fitted a set of alloys to my Clio that had originally come from (IIRC) a Golf with 72.1mm bore that needed sleeving down to 60.1.
Think I’m right in saying that all 4-stud MX-5 wheels are 54.1mm bore.
