Topeak beam rack rx v wsupport 264 31 8a light weight seatpost pannier rack with included side frames for use on road and fitness bikes compatible with all rx trunk bags 15lbs carrying capacity includes rubber bungees and clip for redlite featuresclamp fits 254 31 8mm shims incl side frame equipped rubber bungees clip for redlitematerial aluminumweight 555g1 22lbssize43 x 115 x 23cm16 9 x 45 x 91buy topeak accessories from chain reaction cycles the worlds largest o