Typical Thule (gutter-mount): There are two basic mounting systems used to mount the rack towers on your roof. If you have rain gutters, the Thule 300, 387 or 953 towers are used. Each is a different height to accommodate the roof height above the gutter of the different applications. | Typical Thule aero (non-gutter, style rack tower) If your SUV does NOT have rain gutters, the Thule 400 series towers with vehicle specific adapters are used to locate the rack feet on the roof just above the door jambs. PATROL CCTV offers these rack systems with all necessary components integrated for each specific application rather than ordering each component separately. Once the base rack is installed, all Thule |