Transport your bike on the roof without removing the front wheel
Self-adjusting padded jaws automatically close around the downtube for precise frame hold
Large wheel trays securely hold the bike during transport
Locks included to secure the bike to the bike rack
Fits SportRack roof rack systems, square and round racks, and most stock racks (max. crossbar diameter, 3.5 in.)
Can carry 1 bike
Maximum weight 45 lb / 20 kg

https://canada.sportrack.com/produit/upshift-plus/?lang=fr