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Bags · Topeak

Topeak MTX TrunkBag DXP

The MTX TrunkBag DXP is the classic commuter trunk bag: it slides onto a Topeak MTX QuickTrack rack and locks with a click, then fold-down side panels drop into small panniers when groceries run over. It has a bottle holder, reflective trim and a rain cover. The catch is the rack: you need a Topeak MTX-compatible rack or adapter plate for the slide-on mount. For e-bikes with a stock rack, Topeak sells adapter plates, but measure first. It is a very convenient system for the charger-and-lunch crowd because you can pull the whole bag off and carry it inside.

Commuters carrying a charger, lunch and a layerQuick grocery runsRiders who want a bag that clips on and off in secondsTopeak MTX rack owners

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Key considerations

  • Needs a Topeak MTX QuickTrack rack or adapter plate
  • Expanded panniers can touch fat-tire heels on some frames
  • Not fully waterproof without the cover
  • Weight capacity is modest

Pros

  • Quick-release slide mount
  • Expands into panniers
  • Rain cover and reflective trim
  • Durable

Considerations

  • Rack compatibility required
  • Zippers are the usual wear point

Compatibility notes

  • Requires a Topeak MTX QuickTrack-compatible rack or the MTX adapter plate.

Goes well with

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Topeak Explorer Rack (Disc Brake version)

The Explorer is Topeak's everyday aluminum rack with the MTX QuickTrack plate on top, which opens up the whole MTX bag and basket line. The disc version has offset legs to clear rear disc calipers. It bolts to frame eyelets at the dropouts and seat stays and is rated for around 55 lb, which covers panniers and a trunk bag but not a passenger. On e-bikes, the common snag is that the rear axle area is crowded by hub-motor wiring and torque arms, so leave slack in the cable and use the included spacers. It is a reliable, affordable rack for bikes that did not come with one.

Best for: E-bikes without a stock rack · Commuters who want MTX bag compatibility · Disc-brake bikes

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Ortlieb Back-Roller Classic Panniers (pair)

Ortlieb's Back-Roller Classic is the pannier most shops recommend first, and the reason is boring in the best way: it is fully waterproof, the QL2.1 hooks clamp securely on racks from roughly 8 to 16 mm tubing, and they last for decades. The roll-top closure keeps rain and road spray out of a charger or laptop. Sold as a pair, they hang on a standard rear rack and unhook with one motion of the handle. They are not cheap and not flashy. Check rack rail diameter and heel clearance on smaller-wheeled e-bikes, since the bags are tall.

Best for: Daily commuters who ride in rain · Laptop and charger carry · Grocery runs

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