Yakima Tracks 54" w/CapNuts Low profile when towers are removed Use with Yakima Control Towers with Landing Pads for a versatile, adjustable base for your rooftop car rack system Available in 42" (8001126) and 54" (8001127) lengths with Plusnuts and in 54" (8001138) and 60" (8001135) with cap nuts Love it 'Till You Leave It Limited Lifetime Warranty.