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Topeak MTX Bike TrunkBag DXP

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The MTX TrunkBag uses a unique material process to provide Topeak's largest, stiffest, and most weather resistant MTX series bag. In addition to the expandable top section and rear water bottle holder, the side panels expand to full panniers maximizing capacity. Compatible with all MTX QuickTrack™ racks with attachable side frames. MTX Dual Side Frames are required when using panniers on MTX BeamRacks.


  • This is Topeak's largest MTX trunkbag featuring a new process that marries rigid molded panels with flexible 600 denier fabric to make these our stiffest, most weather resistant MTX bags yet
  • The divided main compartment features a two-stage expanding top plus side panels that zip open into full panniers for even more capacity
  • Compatible with all MTX QuickTrack racks with attached side frames


  • 22.6 L / 1380 cubic inches capacity
  • 1160 g / 2.53 lb weight
  • 36 x 25 x 21.5-29 cm / 14.1” x 9.8” x 8.5”-11.4” dimensions