A crown-shoulder seal lets pressurized spiked wheels stay airtight under dirt and load while improving traction, smooth running, and ground pressure.
A bead lock retention ring secures snow chains on large tires while preserving wheel rim access, easier handling, and a cleaner look.
Movable tread segments and heat-conducting elements help a rim-clamped emergency wheel attachment maintain traction and reduce wear on flat, icy, or snowy roads.