Best advice I can offer is "if you drive an sDrive Z4 e89 then stay clear of 296 wheels, if you now have them then change them. For one day when you least expect it in some small town the TPM light will light up and what you will find is a cracked rear rim"
Should this happen to you then be prepared to spend at least 2 days in the small town motel waiting for replacement rim(s) and tire.
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