Centre bore on aftermarket alloys

Found that a previous owner had done some high quality modification work to these alloys:





I've only taken off the rear wheels so far. One had a spigot ring and the other didn't



Is the centre bore > hub fit important or do the 4 bolts do enough to keep the wheels in the right place?
At the moment the fit can best be described as 'baggy'.

Currently thinking that a solution could be to get a local machine shop to turn the centres and then use thicker spigot rings or similar - would appreciate any input / comments etc.

The wheels are 15" ATS alloys with 4*100 PCD and I want to continue using them on a mk2 golf

Cheers

 

Need spigot, if you do the nuts up super tight it can distort the alloy.
One of my borbets had that happen,
And I've run a set if ats alloys on a metro with no spigot rings (odd hub bearing on them) and it used to snap wheel studs.

I have altered the centre bore on a set of alloys too without problem, used a jig and a tct router cutter to go to a larger size.

If you found a machine shop that would turn your centres, see what size spigots are available, obviously 57.1mm inner, but 66, 70 and 80 external I think I've seen in the past. So you could up size and have an off the shelf ring, but check for the amount of meat left, alternatively get machine shop to turn and sleeve back to 57.1mm.

 

Thanks Dave pretty much all the info needed in one concise response! Will update with progress

 

I'd be tempted to buy the thicker Spigot rings first them get the wheels machined to suit.

I'd by 8 spigot rings as well but I always like a spare!.

 

Sounds like a good idea that.

Next question is - aluminium or plastic spigots!?

 

Had alloy ones corrode on the ferrous spigot of the hub in past, although a smear of copper grease or similar would help.

 

I've had both and prefer the plastic ones too.

 

Thanks both, had a browse for some plastic rings this evening. Also measured up the bore / wheel:





Bit scared to get 57.1 - 66.6 rings so decided to go for 57.1 - 65 instead - hoping that should leave enough material.

 

Hmm, maybe sleeving would be better?

 

You do know if you flip the vernier around it’ll measure the inside of the hole.

I get mine from here - https://ej-parts.co.uk/category/wheel accessories/Spigot Rings/

 

Oh, the spigot doesn't need to go right through, so it's only the back that needs machining, sorry if pointing out the obvious there.
What is your original centre bore of the wheels?

 

Taking the wheels to a local engineering place this week along with the spigot rings. What kind of fit is ideal? I'm guessing closer to interference fit than 'loose' but is there an ideal size or tolerance to go for?

@dodgy no idea about original centre bore of wheels because of the hack job a previous person did on them

 

It would have if the jaws (teeth? ) were long enough and the other end didn't foul on the rim. I was just going for 'good enough' / rough indication of bore size.

Thanks for tip on the spigots

 

I had a wheel priced up for a similar job and it worked out cheaper to buy a new wheel.

 

Spigot ring should be a good snug fit in the wheel.

Maybe take a rear brake disk in so they can gauge the proper size, should be snug in the wheel but slide over the disk hub.

Not a bad job to take a back disk off and the hub is same dimension as front hub.

 

good idea that - rears are drums so will whip one off and take it with me.

@PhilRyder I'm friendly with the place and guy so think it will be done for beer money

 

Nothing like a happy ending. Dropped the wheels off last week and picked them up today.







Plenty of wheel left on the front side and everything looks good to me.

Thanks for the input / advice

 

Excellent result for small outlay ,I like this style of wheel,cheers

 

Always worth saving something from scrap! Especially when it's cheap

 

Nice to see you go it sorted .