This frame-mount rack lets you carry 1 bike on your roof rack crossbars. The adjustable upright arm has clamps with a locking hand knob that grabs your bike securely by the downtube. Universal hardware mounts to most crossbars. Features: Frame-mount carrier lets you transport 1 bike on your roof rack crossbars Adjustable upright arm with clamp grabs your bike by the downtube Arm folds down for convenient storage and improved overhead clearance Locking hand knob secures bike to the rack Sliding cinch straps quickly secure bike wheels to the tray Adjust to fit bikes of different lengths and wheel sizes Universal, clamp-on mounting hardware attaches to most crossbars Steel construction with black powder coat finish is strong, durable, and rust resistant Specs: Application: round, square, aero, elliptical, and most factory crossbars Maximum crossbar width: 3-1/2" Carrying capacity: 1 bicycle Weight capacity: 45 lbs Maximum tire width: 2-1/4" Maximum wheelbase: 48" Overall dimensions: 57-1/2" long x 8" wide x 24" tall Carrier weight: 7 lbs Limited lifetime warranty The Upshift lets you transport 1 bike on your roof rack crossbars. This unique rack has an upright arm with a locking, adjustable clamp that holds your bike securely by the downtube. Universal hardware mounts to most crossbars, and the upright arm folds down for storage when not in use. Adjustable Upright Arm This rack has an adjustable upright arm that fits various bike shapes and sizes. The arm grabs your bike by the downtube, and a padded clamp with locking hand knob secures your bike to the rack. The upright arm folds down when it's not being used. Folding the arm increases overhead clearance, so the rack can remain installed in a garage or other low-clearance areas. Sliding Wheel Straps Cinch straps let you quickly secure your front and rear wheels to the carrier. These straps slide along the wheel tray so that you can carry bikes of different lengths. Universal Mounting Hardware The Upshift easily installs on your crossbars with universal mounting hardware. U-bolts and hand knobs secure the wheel tray to your front crossbars, and a clamp-on bracket with hand knobs secures the tray to your rear crossbars. The rear clamp can be installed at different points along the tray to fit various crossbar spreads.