Tie Down your roof items- canoe, kayak, ladders etc- for safety and comfort. The racks from Thule, Yakima, and Toyota are fine, but those long items up top need to be tied down at the front and back for safe and comfortable driving.
Rayfield Tie-Downs are tough and tested tie-downs for your Prius. The 3/4 inch diameter steel tie-down bolts screw right into the Prius frame. They have a ring to hold your rope or webbing from the front left and right up to the prow of your boat, and from the rear left and right up to the stern.
The small roof on the Toyota Prius dictates that your canoe, kayak, ladder, or other long roof-top carry item be secured front and back. Your roof racks are only about 30 inches apart. What’s the leverage when your canoe or kayak or other long roof item gets hit by a wind gust, or turbulence from a semi trailer in a rain storm. We know- we’ve had a canoe that WAS tied down in front pulled loose and with broken gunwales and punctured fiberglass when a truck blew by us.
The Prius’ aerodynamic body does not have solid places to hook on. The frame does. Two small panels in front allow insertion of a tow hook that screws into the frame. This is how a tow truck pulls a Prius out of a ditch. Two small panels in the rear also have these tow screw-in holes. All four were used to tie down the car during transport from the factory give access to four threaded holes in the collision panels of the body frame.