The thule proride 598 locking upright cycle carrier is a quick and convenient bike roof carrier thule have added in a revised clamp with extended lower jaw which holds your bike in place whilst you secure the wheel straps and tighten everything up the integrated torque limited dial prevents over tightening on lightweight carbon frames whilst ensuring the clamp is still secure deep and flexible padding integrated into the 598s jaws adapts to the shape of your frame giving a more secure hold w