A strong fit for commuters, shoppers, e-bike users and day-touring cyclists who want substantial, organised rack storage that can be removed and carried off the bike.
The TOPEAK MTX TRUNKBAG EXP is a rigid, high-capacity rack bag designed for everyday transport and longer rides. Its divided main compartment keeps your load organised, while the two expandable side panniers add useful carrying space when shopping or packing extra layers. Elastic top bungees provide a convenient place for bulky items, and the rear holder gives you another bottle position—particularly useful on e-bikes or frames with limited bottle space.
The MTX QuickTrack® attachment slides onto compatible racks and locks in place, so you can fit or remove the bag without dealing with multiple straps. Rigid EVA foam helps the bag retain its shape and protects the contents, while the 600-denier polyester construction offers water repellency for ordinary riding conditions. For prolonged wet weather, an optional rain cover is available.
Practical details make the EXP useful off the bike as well: a carrying handle and included shoulder strap let you take it into work, a shop or a café. The 3M™ reflective strip and safety light clip improve visibility at the rear. Before buying, check that your rack is an MTX QuickTrack® rack with attached side frames; if you plan to use the panniers on an MTX BeamRack, you will need the MTX Dual Side Frames.
16.6-litre capacity
The generous combined capacity gives you room for commuting clothes, food, tools and everyday essentials without filling a backpack.
Expandable pannier sides
Deploy the two side panniers when you need extra space, then fold them away to keep the bag compact for lighter loads.
MTX QuickTrack® mounting
Slide the bag onto a compatible rack until it locks, then use the release button to remove it quickly at your destination.
Divided main compartment
The main storage area helps separate and organise your load instead of leaving everything loose in one large space.
Rigid EVA foam construction
The shaped construction helps the bag hold its form and provides added protection for the contents while riding.
Bottle and visibility features
A rear bottle holder, 3M™ reflective strip and safety light clip add useful capacity and visibility for everyday riding.
Carry it off the bike
The included shoulder strap and carrying handle make it easier to take your luggage into work, shops or accommodation.
Rack-specific compatibility
Designed for MTX QuickTrack® racks with attached side frames; MTX BeamRack users need optional MTX Dual Side Frames for the panniers.
General
Materials & construction
Dimensions & weight
Compatibility
Features
QuickTrack®
Slide the bag forward along a compatible MTX or RX rack until it locks securely in place. Press the release button to remove the bag quickly and carry it with you.
Expandable side panniers
The two side panels expand into panniers when you need additional carrying space, while keeping the main trunk compartment organised.
Rigid EVA foam construction
Rigid EVA foam helps the bag retain its shape and provides added protection for your contents while riding.
Prepare to Ride
TOPEAK is a cycling accessories brand focused on practical equipment for riding, maintenance, transport and storage. Its product range includes pumps, tools, bags, racks, lights, fenders, bottle cages, bike travel cases and workshop equipment for road, mountain, gravel, touring, urban and electric-bike use.
The brand describes its work as being driven by cycling experiences ranging from short trips around town to long journeys. TOPEAK’s history of product development includes the QuickTrack® BeamRack and TrunkBag introduced in 1997, alongside later systems and accessories designed to support everyday riders and performance cyclists.
