With the specialized burra burra stabilizer seatpack 10 you can say goodbye to the cumbersome weight and handling of integrated rear racks instead it affixes to your seatpost via an engineered aluminum stabilizer arm that minimizes any bouncing or side to side swaying under load the pack itself features a welded roll closure design that39s highly resistant to inclement weather while its smaller size 50x16x10cm makes it ideal for smaller frames with tight wheel clearances specialized bu