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      12-28-2019, 01:00 PM   #1
Rombbb
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Drives: Z4MC
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Z4m BBS CH lugs overtorqued by 40%...

Hello,

For Z4M the advised wheel torque is 88ft/lb's, 120NM, +/- 10% approximately.

BBS CH docs state 82ft/lb's, around 110Nm.

My lugs were torqued at around 115 lb/ft, 155Nm, 40% more.

I guess ft/lb's and Nm's were mixed up during tightening. Thinking it was Nm the wrench was set to 115, but as it was a ft/lb wrench this resulted in 155Nm of torque.

It's corrected now and I checked the lugs on one wheel which looked pretty ok, as far as that can be seen by the naked eye. That alloy wheel did need some persuasion in getting of the hub but that could be normal, don't know.

Happy nothing cracked, the car seemed to drive fine. Was overtorqued for almost a year, not that many miles.

Is all good now or were the lugs stretched too far and I better replace them ?

Thank you

Ps. the idiot that overtorqued them was almost certainly me
Appreciate 0
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