Castor exceptional for its design quality and robustness.
Everything is oversized: a very dense solid rubber tire, a 4 mm thick galvanized steel rim, a bearing 6204Z sealed ball bearing in steel that will allow you to apply minimal pushing effort.
The treads allow you to roll on all terrains even in the presence of mud.
You can leave the castor with a constant static load, it will only compress very little and will not deform the wheel unlike other models on the market.
Ideal product for rolling a piano over long distances, moving jet skis, small boats, etc...