Topeak MTX Trunk Bag DXP (Black) (22.6L) (w/ Expandable Panniers)

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Topeak MTX Trunk Bag DXP (Black) (22.6L) (w/ Expandable Panniers)
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Price: $139.95

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The Topeak DXP Trunk Bag provides a flexible carrying solution for whatever gear you need. With expandable pannier pockets, the DXP Trunk Bag can hold up to 22.6 liters or be zipped up for times where less carrying capacity is needed. With Topeak's MTX QuickTrack mounting system, the bag attaches quickly and securely to compatible MTX rear racks.


  • Extra-large capacity trunk bag with divided main compartment, multi-stage expanding top
  • Panels on both sides expand out into panniers
  • Insulating rigid molded EVA foam side panels
  • QuickTrack click 'n go compatible (for use with Topeak MTX racks - see EX Beam, Explorer, Super Tourist racks)
  • 600 denier nylon fabric for rigidity and water repellency
  • Includes carrying handle, shoulder strap, 3M reflective strip, tail light clip, bungees, water bottle holder

Pack Type: Trunk Bag w/ Expandable Panniers
Pack Capacity: 22.6L (Expanded)
Mount: MTX Mount
Waterproof: Water-Resistant
Material: 600D Polyester
Dimensions: 14.1 x 9.8 x 8.5-11.4"
Color: Black
Weight: 1160g

Looking for a trunk bag that is compatible with other racks? Checkout the strap mounted version.

This product was added to our catalog on March 26, 2019

Tim Flanagan
Verified Owner
Tuesday, Aug 29 2023 (10 months ago)
Topeak MTX Trunk Bag DXP (Black) (22.6L) (w/ Expandable Panniers)
Bag was exactly what I was looking for and they got it to me pretty darn quick.

Thanks, Performance!
Harvey Miller
Saturday, Oct 29 2022 (about a year ago)
Topeak MTX Trunk Bag DXP (Black) (22.6L) (w/ Expandable Panniers)
I used this trunk bag on a week long inn-to-inn bicycle ride. This system is the PERFECT one for that purpose. I was easily able to hold everything I needed and, because I used Amtrak, was able to slide the whole thing off my bicycle in seconds so I could hang my bicycle in the compartment meant for that purpose.
Its made of very tough material, all aspects (including the zipper), are first rate quality and function.
The only possible design flaw may be that, in order to carry the system there's either a handle or a shoulder strap. The handle's placement results in the zipper taking on the entire weight of the system. As such I used the shoulder strap instead, having it do double duty by wrapping the strap around my seat post as a back-up safety system just in case the latch holding it all to the rack failed.
Make sure you also purchase the rain cover which is sold separately. In case you think that's a bad idea, note that at least you have a choice whether to buy it or not, otherwise the price would go up anyway.
I highly recommend buying the Topeak MTS Trunk Bag DXP.
Leslie Stewart
Verified Owner
Wednesday, Jun 15 2022 (about 2 years ago)
Topeak MTX Trunk Bag DXP (Black) (22.6L) (w/ Expandable Panniers)
This bag is great, however the back of the bag is not like the photo on your website. I have the same one I purchased several years ago and it has black interior and a buckle to tighten the rear bottle holder. Still it is a great bag.
Jim W
Monday, May 23 2022 (about 2 years ago)
Topeak MTX Trunk Bag DXP (Black) (22.6L) (w/ Expandable Panniers)
It finally wore out. I have been using the one I purchased in 2014 for 7 years. Over time, with moisture, salt, sun exposure, and carrying loads that might have been a bit more than expected, it finally ripped out. Sometimes I felt like a pack mule, but this bag never let me down. Purchasing another as a type. A Great Value!!!