The custom-designed R-Trac Wide wheels feature low profile no-flat tires, lightweight but strong polymer hubs, low rolling resistance, pneumatic-like cushioning, vastly wider load dispersion
over soft terrain, and a stunning racing-style look. 6"x3" brake casters are 50% wider than typical casters and can glide over soft terrain.
The R6x3CSTR is a replacement caster for the R16RT
and can be purchased as an upgrade caster for the R14RT.