WTF: Hub Centric Rings
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WTF: Hub Centric Rings
What do I have to do to get some 70mm to 56.1 mm rings. I have Brand New Wheels and Tires sitting in my garage because no one has these on hand. Any pointers or vendors I can order from and pay for overnight. Still waiting on my order from ECS. It's been a week as it's direct from supplier. HELP!
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I have no vibration at 125+ on the track or on the street at highway speed with or without centering rings, you may want to find another shop for your tire balancing, if single weight find someone that will do dynamic balance
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Did that. Twice on first set of wheels by 2 different shops that deal with cars that actually require dynamic balancing, Porsche's, Ferrari's etc. Spent double on the next set of wheels (went from Sparco's to OZ's). Both sets of wheels required hub centric rings. The only thing that stayed the same from set to set was plastic rings (new set for each set of wheels).
That's why I recommended maybe the metal centering rings. In the end, stock is where I landed. If I were to buy aftermarket again I'd get wheels with the proper bore for the application.
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Somewhere there is an article on how the wheel is held to the hub via torqued bolts/nuts. That is why both wheel bolts and nuts are tapered with the wheel also being machined/cast with a similar receiver tapered hole.
It is a matter of physics and not the hubcentric ring.
It is a matter of physics and not the hubcentric ring.
Almost all of the vehicles I've ever owned have had aftermarket wheels and have never had the vibration issue. However this is my first that requires hub centric wheels and uses bolts instead of studs.
I went thru hell and back with the issue. Had calls with the vendor and manufacturers that led nowhere. They sent a couple new sets of rings, changed out a set of wheels completely. Problem persisted. It'll be a while before I venture back to the aftermarket world for wheels on this MINI. And really, aside from being a heavy 23lbs., the R112's are sweet wheels.
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I was in construction, built everything from houses to some very sophisticated pharmaceutical facilities. Dealt daily with tolerances. If you want a rotating mass such as a pulley to have minimal vibration then the pulley is installed on a tapered shaft and is either pressed or torque bolted in place. To remove the pulley, a puller most be used to overcome the force used in the initial placement. A wheel on a car is not installed similar to a pulley as the wheel can be easily removed once the fasteners used to attach are removed. The bore of the wheel compared to the hub that it is placed over has a difference of possibly up to 1 mm, and IMO that tolerance is great enough so as to lend no "support" in minimizing vibration.
I am under the impression that when you torque the wheel lugs, thinking around 88 ft. lbs., it is not to keep the lug from loosening up but rather so that sufficient force is applied to keep the wheel rotating true in the "x" axis. The tire is balanced to keep the rotation true in the "y" axis.
I am under the impression that when you torque the wheel lugs, thinking around 88 ft. lbs., it is not to keep the lug from loosening up but rather so that sufficient force is applied to keep the wheel rotating true in the "x" axis. The tire is balanced to keep the rotation true in the "y" axis.
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Qik420 (08-28-2017)
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This hasn't been my experience with my e46, or my e34. Not sure if those are considered "modern". I've always understood BMW to be hubcentric.
The following users liked this post:
Qik420 (08-28-2017)
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I am under the impression that when you torque the wheel lugs, thinking around 88 ft. lbs., it is not to keep the lug from loosening up but rather so that sufficient force is applied to keep the wheel rotating true in the "x" axis. The tire is balanced to keep the rotation true in the "y" axis.
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I have plastic hub adapters, metal ones, and I've ran with none, no difference. I'm not sure how the plastic ones hold up to track temps, my rotors have been 650 degrees after a cooldown, the wheels are too hot to touch, I have to let them cool down before I rotate tires
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I've also ran plastic, metal, and none. I've not noticed any difference with vibrations with different materials. I've noticed a massive difference without running them. I'm not sure where you've read that they're lug-centric. In all of my experience and with everything I've ever read regarding BMW, they're hubcentric and it makes all the difference.
Could you cite something that says they're lug centric? All I can find with a quick google search is forums on forums saying they're hubcentric and need rings, which coincides with my personal experience.
Could you cite something that says they're lug centric? All I can find with a quick google search is forums on forums saying they're hubcentric and need rings, which coincides with my personal experience.
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