I have contacted the seller but he has not responded. My application was for a jet ski trailer with a 12" forged wheel. The fully closed temple tips snag not with the spokes and the boot just smacks the wheel.While this would offer minimal protection if the trunk were left in front of the wheel, cargo trailers are light enough to be lifted/jacked up to close the trunk behind the wheel position so that the trunk just drags behind the wheel.The boot is solidly constructed.