Hub Centrics
 

So i've lost my hub centrics, what size do i need ?
I run xxr's 550 17x8.5
Wheel bore is 73mm if im correct, just need clarification.
Thanks.

Do you have a receipt from when you bought them?

You dont need any.

Hub bore is 56.1





17x8.5 is a rare size. :cheers:

Wrong. You cannot locate the wheel reliably using the lug seats. Bolt circle tolerances don't work that way.

Wrong. Tapered seat lugs are actually designed to precisely center each lug on the stud.

Flat seat lugs would be an issue, but conical (spherical) or tapered seats are 100% fine.

http://www.agcoauto.com/content/imag...ug_designs.jpg

You're both right.

Yes, a hubcentric ring will help support the wheel on the hub and make sure it is centered better than just the lug nuts.

However, will using only the lug nuts to keep the wheel centered work? Yes, and you probably won't have an issue, depending on usage. It's just less robust.

Hub Centrics
 

I'm not worried about the conical seats.
The hole pattern in the hub is not nearly as accurate as the surface of the hub bore, hence why I mentioned bolt circle tolerances.

I've used conical lugs without a hubcentric ring and gotten significantly vibrations in the wheel. I'd rather use the hub surface if it was designed for it.

What kind of shitty wheels are you guys using that a spherical lug hole wheel needs to be hubcentric to avoid vibrations?


My stock miata wheels aren't hubcentric and work perfectly. I can't imagine an OEM would use non-hubcentric wheels if it was going to be such shit.

Hub Centrics
 

Volk TE37s. Maybe I'm just anal and what is a significant vibration for me isn't for most people.

Sometimes disbalance might come also from other unnoticed reasons. For example if tire on wheel is non remounted/rebalanced for years, some uneven wheel/tire wear/damage or fix/patch w/o rebalance, or if some balancing wheels happened to fall off at some point, if one tightens lug nuts in wrong order not in cross/star fashion. By my experience in most cases even without spigot center rings lugcentric wheels itself always centered right with properly tightened lug nuts on all cars/wheels i had so i'd rather blame other reasons as more possible. Though then again hub rings are cheap, so one's budget won't be broken if one buys them for ease of mounting and some piece of heart/extra ensurance. Just that imho they are not must have/mandatory on lug centric wheels, but cheap nice to have extra.

I never used hubcentric rings back in he day. Then one car I had needed them, and I had to wait to get them. Now I always get them. They do not cost much, and can save a big headache.

Are you suggesting that a plastic ring will hold the wheel in place more than 5 steel lugs/studs properly torqued down? If the lug bores aren't centered properly around the bolt circle the metal lugs and studs will definitely squish the plastic ring vs offsetting themselves within the bores.

If you're properly torquing down wheels (wheel in the air, star pattern a bit at a time), the wheel will absolutely center itself. If you set the car down before the lugs are seated properly, then you'll definitely get a wobble. Going into my 6th summer with the car running RPF1's without centering rings, no vibrations ever.

If you google it, it does answer pretty much all the stuff you're looking for.
This site shows XXR 550 specs. Which show what size centerbore is. Member already answered stock hub bore size in the post.

With that info go to Amazon or eBay to search hubcentric ring: "(wheel centerbore)mm to (hub bore)mm".