Just insert wheel between the frame to stand the bike Frame span is adjustable Using on rear wheel os preferable for greater stability Strongly recommended to use at least 2 units are connected to avoid falling accident.Frame Span 46 62mm Connect Bar Size 22 x 540mm Material Steel Net Weight 1.5 kgs Part Number: 421-1420-01 Barcode: 4944924421458 Product Code: MIN DST 110R