pair hubcentric wheel spacers 30mm

[batchman]

New, test fit only, believe to be H&R, bought from TireRack a few years ago. What you see is what I've got. These were not the answer for our setup but maybe you have something you would like to try.

Figuring $60 shipped continental US, obo. PayPal, check, whatever.

Best of the new year to you all,
- Jeff

[WVZR-1]

I can't read the caliper in the 4th snapshot which would be the "wheel bore diameter". The bore of the adapter looks to be GM 70.3 so that would indicate the OD for the wheel bore might be an issue for a GM application using a GM/OE wheel. What is that dimension? You might confirm the 70.3 on the back-side of the adapter also.

[batchman]

Doh - downsizing seems to have hurt legibility - sorry 'bout that.

They do have a "GM" cast in, I'm not at home but will re-measure later.

Thanks/later,
- Jeff

[XfireZ51]

BTW, they appear to be BOTH hub and wheel centric which is an important point.

[WVZR-1]

BTW, they appear to be BOTH hub and wheel centric which is an important point.

Hub centric to a GM hub (70.3) but wheel centric to what? That's the dimension I can't make out in the snapshot. The back-side isn't actually dimensioned but if you assume it's a consistent bore throughout the 70.3 holds up. Hub & wheel is important but the wheel-bore dimension is important to someone that's interested. It will certainly make them easier to sell for the OP if he knows for sure. They're quality pieces for sure and there's a slight taper on the hub/back-side similar to an OE wheel. That's not done on all spacers.

[XfireZ51]

If you look at the pics closely you'll see that there is an inner chamfer on the adapter to center it onto the hub. Additionally there is an outer lip on the wheel side. This lip helps center the wheel onto the adapter. So the adapter is now centered onto the hub and the wheel centered onto the adapter maintaining concentricity of each component. The measurement for the wheel centric should be the same as a standard GM hub. It's made to mimic the hub for the wheel.

[WVZR-1]

The measurement for the wheel centric should be the same as a standard GM hub. It's made to mimic the hub for the wheel.

That's why I ask because these DO NOT appear to "mimic" (your term) a GM spec dimension. If the bore on the face is 70.X+ then there's no way a GM/OE wheel with a bore of 70.3mm will fit over the OD of the adapter. What I mention is "obvious" in the third snapshot. Simple as that! If you've doubts measure the bore of an OE/GM A-mold, saw-blade or what-ever, beyond the taper/chamfer it's a dimension of 70.3 +/- The back-side of the adapter is certainly as you suggest, a duplication of an OE/GM wheel bore. The only other explanation is the vernier is incorrect but I seem to see 80mm +!

[Blue Flame Restorations]

That's why I like having access to a Bridgeport and lathe.;)

[XfireZ51]

Dave,

Please read again what I wrote. I didn't say it mimic'd a GM wheel spec. I said the outer lip mimics the hub for the wheel whatever the dimension is. My initial post in this thread was simply to point out its a hub and wheel centric adapter. Was not trying to vouch for its application to GM wheels. I was assuming that if one measurement was standard GM then the other would also be.

[WVZR-1]

Dom,

I quoted you on your comment.

My post in #5 where I mentioned hub-centric to 70.3mm GM hub but wheel centric to what? That was intended to maybe get the OP/Jeff to respond as to what the intended application was. I went on to substantiate WHY I questioned what I saw in the snap-shots

an example might be a BBS X-lace with an 80mm wheel bore.

You went on to attempt to convince me that I didn't know what I was looking at, chamfers etc. and then commented the "mimic" of the GM hub. Had you just looked at the snap-shots a second time you would have understood my comments. I assumed nothing.

I understand wheel dimensions, adapters, spacers and the differences. If the Vernier was NOT in error I believe my comments are substantiated by the snapshots.

It's really NOT an issue! Happy New Year!!!!

My only intentions in the thread were to make the OP/Jeff aware of what might help him in the sale of the adapters. Nothing more.

[batchman]

Good points and last night I remeasured the wrong thing. Will try to pay more attention tonight!

At the time I was trying to put clone A-molds with GS offset on the ZR-1. I recall the adapters behaved as hub centric but they were too thick for my large-shouldered slicks (335 Hoosiers on an 11" wheel gets, um, interesting).

Thanks for the questions, I will try tonight to re-confirm hub fitment to an A-mold and re-measure the "snout". And I'll try to do that *before* festivities begin...

Best,
- Jeff

[batchman]

Just realized I did measure the hub side at about 70.6 or .7 (a little hard due to the clearance at the hub face vs the adjust knob on the caliper), and they do "nest". So that would seem to mean no 80mm centric here.

HTH for now,
- Jeff

[Ronstar]

Ever figure out if they are hub and wheel centric for corvette
wheels?

[batchman]

Appears I've ended last year with a twist. In my defense I'll point out it was maybe 5 years ago when we bought these, I bumped into and took 'em out last summer and took pics, then a couple months ago re-sized those to be post-ready, and just now I have gone back and re-confirmed the following:

They are Chevy bolt pattern both directions, 5x4.75".

They are centric on the GM hub, measuring 70.6 or so on the hub side.

The snout, or wheel side, is 81.7 or so. They do not fit in the clone A-mold I had handy. They do fit in my CCWs, which I do wish the spacers I wound up using would support (those are flat).

Thanks for the watchful eyes, folks - wouldn't want somebody winding up with the wrong thing.

Best of the new year to you all,
- Jeff

[batchman]

As it came up in discussion, I am happy to offer a refund less shipping if these do not work out for any buyer. So you can test something risking only the transport.

Thanks and regards,
- Jeff