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Re: My wheel fell off tonight! (archive)

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Posted by Kurt Z. on October 10, 2000 at 15:26:54:

In Reply to: Re: My wheel fell off tonight! posted by eric on October 08, 2000 at 14:58:46:

Sorry, I've been away for a few days. If you look at your wheel and your lug bolt you will see a cone shaped area on the wheel where the bolt goes through it and on the bolt itself. If both the bolt and the wheel cones have the same angle, then the lug bolt will completely mate to the wheel. This is what I mean by seating. If the angles are slightly different then instead of having several square centimeters of surface area pressed together you will only have a thin ring of surface contact. Make two cones out of paper, one tall and skinny, one short and fat, then try to stick one inside the other and you will see exactly what I mean.

I you purchase longer lug bolts and you told the vendor what type of wheel you had, then your lug bolts should seat properly. They could have accidentally sent the wrong bolts.

As for rebalancing the wheel, put it on, drive it and see if you feel a vibration. If you don't feel one, don't worry about it. Remember, however that if you ever rotate it to the front, you may suddenly get a vibration through the steering wheel that you couldn't feel on the rear, but this can happen with all wheels.

Kurt

85 lbs of torque is plenty. Are you sure that your lug bolts (or lugs nuts if you have studs) seat properly in your wheels? If the bolts are seated properly, you should never have a problem. However, if they don't seat properly it really doesn't matter how tight you torque them, they will work loose.

My friend put some 325i wheels on his 2002 using his 2002 lug nuts, they didn't seat properly and he lost his front wheel on the freeway. Amazing that he didn't total his car then (a thunderstorm and a tree branch totalled it later :-( ).

Kurt


I put them on last tuesday. I tourqued them down to 85 pounds, should I have gone tighter? I found the 15mm H&R spacer on the road, the lip was completly gone, I don't know if this was the reason for the wheel coming off or not.

Oh yeah, I'm also going to need ONE 15mm spacer since this one is ruined, anybody got just one?

I'm also going to need to re tap at least 3 threads
Eric
88M3
Hey!
I feel your pain...Good thing you were going slow. Who tightened your wheels recently?
Denis
91M5
95 CBR600


what do you mean "seat properly?" The rims are 98 M Contour II's on my 88M3 with 15mm H&R spacers and longer bolts. I've never heard of them not seating properly, but I don't know what that means.

Also when the wheel came loose, the brake rotor and caliper smashed against the rim makeing some abrasions on the inside of the rim, nothing bad, just mainly took off the paint. Should the rim be re balanced?
thanks
Eric
88M3





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