Genoa cars for 1-1/4" (32mm) T-track with spring-loaded plunger pins for fast, positive positioning, that can be locked in the “Upx9D position. RC73234 includes a 60mm Core Block that articulates in three planes with an integrated anti-clatter rubber buffer. RC73231 uses plain bearings and can accommodate two sheets for easy headsail changes. For boats up to 40'. Max. Line Dia.: 1/2" MWL(lb.): 2,200