Will this work with my roof rails, or do I need crossbars?

This rack is designed for standard crossbar mounting. If your vehicle has only rails (no crossbars), you'll need crossbar adapters—check your vehicle's roof system before ordering.

Does the lock secure the bike to the rack, or the rack to the car?

The lock secures the bike to the rack itself. It prevents theft of the bike while parked. You'll still want to ensure your crossbars are properly tightened to the vehicle.

How do I know if my bike's wheel will fit in the clamp?

The wheel-on design accommodates most standard tire widths, but tire diameter and tire bead width vary. Test-fit your bike's wheel in the clamp before committing to a drive—bring your bike to inspect clearance.