Hub centric rings
Thread Starter
Heel & Toe
Joined: Jul 2025
Posts: 20
Likes: 5
Hub centric rings
I bought a set of C4 Grand Sport Replica wheels off of jegs (oe wheels brand) for my 1985 Corvette. The spacers I’m using to makeup for the offset are hub centric. The wheels have an inner diameter of 70.7mm’s and the hub bore is 70.3mm’s. Does anyone know of a place where I could get hub centric rings to fill that gap? I’ve been looking for awhile and I can’t find any. Thanks in advance.
Pro
Joined: Jul 2023
Posts: 541
Likes: 280
From: Marysville WA
This company may be able to make you a custom ring. 4/10 of a millimeter is a pretty skinny ring.
https://www.uswheeladapters.com/shop...ings-aluminum/
https://www.uswheeladapters.com/shop...ings-aluminum/
Thread Starter
Heel & Toe
Joined: Jul 2025
Posts: 20
Likes: 5
This company may be able to make you a custom ring. 4/10 of a millimeter is a pretty skinny ring.
https://www.uswheeladapters.com/shop...ings-aluminum/
https://www.uswheeladapters.com/shop...ings-aluminum/
Le Mans Master
Joined: Aug 2015
Posts: 6,119
Likes: 1,997
From: St. Charles MO
This company may be able to make you a custom ring. 4/10 of a millimeter is a pretty skinny ring.
https://www.uswheeladapters.com/shop...ings-aluminum/
https://www.uswheeladapters.com/shop...ings-aluminum/
WVZR-1 is 100% correct. The hub pilot is never, ever what locates a wheel on a hub. Hubcentricity doesn't matter one bit in terms of locating the wheel. It never has and it never will. The ONLY thing that EVER locates our wheels are the tapered conical lug nuts' "zero-clearance" fit in the tapered bolt holes. That's it. Then, once those locate the wheel (as you start torquing the lug nuts), the immense clamping force supplied by the lug nuts holds the wheel in place on the hub's face with static friction. The studs don't react any wheel forces, and neither does the hub pilot. Hubcentric fitment is only done at the factory to make assembly line wheel mounting faster. That's it.
Instructor
Joined: Nov 2012
Posts: 240
Likes: 18
From: Carrollton Illinois
You can typically assume that wheels with conical lug nuts (American, Japanese, some German) are all lug centric and located with the typically 60 degrees lug taper. Cars with spherical lug seats, typically lug bolt cars and mostly German, are generally hub centric.
Le Mans Master
Joined: Aug 2015
Posts: 6,119
Likes: 1,997
From: St. Charles MO
There's no way a wheel bore and hub can have a tight enough tolerance to locate the wheel accurately while still allowing for easy mounting/dismounting. You could machine bores and pilots to a very tight tolerance, but then the wheel would be a PITA to mount, and the slightest bit of dirt or corrosion would make it impossible. Also, if you did try to locate the wheel that way, then you would absolutely not want a conical or spherical nut and seat, because they might end up "fighting" with each other if they were not micron-perfect, which would put a hell of a side load on the studs. In that situation, you would want a flat-seat lug nut that only applied clamping force without any lateral locating force at all. I found a good writeup on that on Facebook.
