From Street to Track: Why A VTT S55 Crank Hub Upgrade Is Essential
From Street to Track: Why A VTT S55 Crank Hub Upgrade Is Essential If you own an S55-powered BMW, you’ve probably heard about crank hub slip. It can happen for a handful of reasons, but the pattern is consistent: as load increases and driving gets more aggressive, the factory S55 crank hub can rotate and throw timing out of sync. Best case, you’re dealing with warning lights and reduced performance. [...]