The quickest and most convenient cycle roof carrier on the market the revised clamp with extended lower jaw holds your bike in place whilst you secure the wheel straps and tighten everything up thule use an integrated torque limited dial to prevent over tightening on lightweight carbon frames whilst ensuring that clamp is still secure using deep and flexible padding integrated into the 598s jaws the mount adapts to the shape of your frame giving a more secure hold whilst minimising the chanc