Standard small wheel trolley central axle 2.0m connecting bar axle, with inserts. Suitable for 25mm stub axles as fitted to many trolley cups – Windsport – CatParts
Genuine Weldtite Bike Wheel Axle - Solid Cro-moly or Hollow QR - Front or Rear
AB Tools 2 PACK Trailer Trolley Wheel Hubs, Wheels & Stub Axles 22 x 11.00-8 Off Road : Amazon.co.uk: Automotive
leisure MART Trailer axle set 2 x taper hubs 4 inch PCD 2 x square stub axles 2 x 8 inch 4PR wheels and tyres Pt no. LMX2321 : Amazon.co.uk: Automotive
Axle - Wikipedia
55mm Single Flanged Steel Wheel with a steel stub axle Castors, Trolley Wheels & Castors Online from Ross Handling
Physical Science 4.4a - The Wheel and Axle - YouTube
Wheeleez® Wheel Axle Kit; 26 cm (10.2") Tuff Tire Wheels - Asian Prime Sources Limited
Simple Machines: Wheel and Axle Craft (teacher made)
Stubb axles and cast wheel set only - Forged Ironmongery