Jake Sales Chain Link Rolling GATE Track Wheel Roller: to 2" Gate Frame & 1-5/8" Track Pipe 1 Pack. : Amazon.co.uk: DIY & Tools
4 Pcs Sliding Gate Wheels 50mm, Steel Wheels with U Groove, U Groove Wheel for Reverse Track, Industrial Machine, Rolling Door, Load Capacity 300kg per Wheel
Skelang 2 Inches Sliding Gate Wheels, V Groove Gate Wheel, Sliding Gate Track Wheels with 360