jbed

For those with a Porsche roof transport system rack AND a Porsche bike carrier, what size is the square head of the screw that slots into the groove? I’m trying to see if my Thule ProRide XT carriers are truly compatible - they look like they are but curious on the size of the top of the t slot screw in mm.

thanks

C60Record

I’m not sure what the size is, but both my Thule UpRide and 1Up fit the slots no problem.