Kev hloov kho tshiab siab kub, plua plav pov thawj thiab tiv thaiv kev laus, ua los ntawm polyurethane, hnav-tiv taus, tensile-resistant, tsim kua muag-resistant, siab-lub zog, compression-resistant, high-compression-resistant thiab compressive, maximizing cuam tshuam ntawm shock absorbers thiab springs kom muaj kev ruaj ntseg ntawm lub tsheb.