Thanks, but I mean the diameter of the center bore of the rim, Outer Diameter in the picture below:
Inner Diameter, which is the diameter of the hub circle should be 67.1mm
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i20N wheel compatibility
- Thread starter KCUFRADIO
- Start date
Inner Diameter, which is the diameter of the hub circle should be 67.1mm
Yep, my info also gives 67.1mm. The ring pictured above doesn’t exist with the stock wheels and is provided with aftermarket wheels so they can fit a number of different bore sizes. The outer diameter depends on the wheel manufacturer and it is the inner diameter that is the issue. I’m afraid I’m not clear on what you want to know?
No, mine definately didn’t have them (I say didn’t because I now have aftermarket rims that did need rings).
Our original hub is not 67.1 mm
I bought original braid wheels with centerbore that Hyundai claims (67.1mm) and guess what… that is space between wheel hub and car hub and of course some vibration on up to 120km/h
I had to buy aluminum rings made with the perfect size to fit properly the hub of the car.
My measure was 66.9 mm.
I bought original braid wheels with centerbore that Hyundai claims (67.1mm) and guess what… that is space between wheel hub and car hub and of course some vibration on up to 120km/h
I had to buy aluminum rings made with the perfect size to fit properly the hub of the car.
My measure was 66.9 mm.
You gotta be kidding me, I just bought braid wheels thinking I wont need to buy rings…
Do you have link for aluminium rings maybe?
No is not a joke
If you ask Miguel Rigol from braid, he will remember my case. I consider return the braid wheels, because I thought was a braid mistake that had made the wheels with large centerbore but no, the braid wheels have the “correct Hyundai claimed centerbore”.
I had to go on wheels shop, take the original wheel and they compare the wheel hub and made correct ring.
On market you will not find.
That’s not true, rings have only the function to help fitting correctly the rim. Actually alloy is worse as they might get stuck and are harder to remove. If you properly tight the nuts the rings are actually not necessary, but they do help to be sure everything is centered
As you trash the car as it should be, plastic melts away or changes its form. Normally bolts should center enough alone but, same with spacers that haven't a center hub, you get vibrations. The bolts need a static hub to take all of the forces seriously!
Agreed on the plastic, although I haven’t had issues despite the front wheels of this car literally become lava at the track (brake cooling WIP)
For the forces not really, bolts simply do not take shear forces, what keeps the wheel attached to the hub is only the friction force between the two metal surfaces of hub and rim.
With very roughy math, 120Nm of nut torque means 5000kg of clamp load per nut (see here), so for 5 nuts that’s 20000kg. With a nominal friction coefficient of 0.15 that amounts to 3000kg of friction force keeping together hub and rim. The weight of the car per wheel is roughly 300kg, so you have a 10x safety factor. Even if you jumped with the car you’d likely break something else before the friction between hub and rim fails…
I think the plastic ones for normal driving are safe. For track and long spirited driving the risk of melt is bigger.Agreed on the plastic, although I haven’t had issues despite the front wheels of this car literally become lava at the track (brake cooling WIP)
For the forces not really, bolts simply do not take shear forces, what keeps the wheel attached to the hub is only the friction force between the two metal surfaces of hub and rim.
With very roughy math, 120Nm of nut torque means 5000kg of clamp load per nut (see here), so for 5 nuts that’s 20000kg. With a nominal friction coefficient of 0.15 that amounts to 3000kg of friction force keeping together hub and rim. The weight of the car per wheel is roughly 300kg, so you have a 10x safety factor. Even if you jumped with the car you’d likely break something else before the friction between hub and rim fails…
About the hub, the rings are not just for center the wheel. All of the weight in every corner, jump of suspension, are supported by the center hub of the car if the hub wheel match the last one. If there is a space between this two, all of the weight is supported by the lug nuts.
Maybe not broken on 100 first attempts but on track and spirited drive is certainly big risk. One more thing, the vibration is guaranteed and is not a good sign.
Nope, it’s friction
Admittedly one of the most counterintuitive things I learned in engineeringAfter some researching I'll try it without centering rings.
Most say that if you tighten the nuts to spec and in good order there should be no vibration, especially since there is only 0.2mm in hub difference. I'll come back with more information when I put my wheels on, this or next week.
Most say that if you tighten the nuts to spec and in good order there should be no vibration, especially since there is only 0.2mm in hub difference. I'll come back with more information when I put my wheels on, this or next week.
I just want to check that I'm reading the above correctly.
Your new wheels have a bore size of 67.1mm (the claimed Hyundai hub diameter) and your hubs measure 66.9mm, so you had aluminium rings made that are only 0.1mm (less than 4 thousandths) thick to take up that 0.2mm difference? Is that correct?
Your new wheels have a bore size of 67.1mm (the claimed Hyundai hub diameter) and your hubs measure 66.9mm, so you had aluminium rings made that are only 0.1mm (less than 4 thousandths) thick to take up that 0.2mm difference? Is that correct?
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What the experts have done was this:
with the original wheel and the braid wheel, they compare the hub of both and made rings for braid wheels.
66.9 that’s my measure on the hub car, maybe it’s less.
One thing I’m sure
The braid ones have originally 67.1
Our original wheels don t have. They try to put circular oring of metal with exactly 67.1mm on our original wheel and is not possible! Don’t enter!
So, the thickness of my center rings I don’t know!! But I have center rings because I had those on my hand when I changed my tires.