Waterproof modular rear rack top bag system with removable 14L dry bag.

Quick-access pockets • Stable cradle • Easy to remove • Dropper-post friendly • Naturally aero

Why a rack top bag?

A rack top bag is a great middle ground between a saddle bag and panniers.

Compared with a large saddle bag, it is usually more stable and works better with smaller frames, low saddle height, or dropper seatposts.

Compared with panniers, it keeps the bike slimmer and more aerodynamic, with less side movement and less chance of catching branches, walls, or your own legs while pushing the bike.

It is also part of a larger modular rack setup. When you need more carrying capacity, you can add full-size panniers, mini panniers, or side dry bags mounted with cargo cages.

It is a very practical setup for modern bikepacking, especially if you already use a rear rack.

Dropper-post friendly

Because the load sits on the rack and not under the saddle, the PackTrain system is dropper-post friendly.

This makes it a good choice for gravel bikes, hardtails, ATBs and modern adventure bikes where a classic saddle bag may limit seatpost movement or rub the rear tire.

Modular by design

The dry bag can be removed literally in seconds.

Arrived at camp? Take your clothes and sleeping gear with you.
Going into a shop? Grab the bag like a tote.
Stopping for coffee? Take your valuables with you instead of unpacking the whole bike.

The cradle can stay mounted on the rack when you ride without the dry bag. Just wrap it around the rack platform, and one pocket stays on top for quick access.

Extra storage between the cradle and dry bag

One of the small but very useful advantages of this system: you can place extra items between the cradle and the dry bag.

Real-life examples:

• Camp shoes
• Tent poles
• Rain jacket
• Wet layer
• Small tarp
• Food bag
• Anything you want to keep outside the main dry bag

This gives the system more flexibility than a simple fixed rack bag.

Two quick-access side pockets

The cradle has two Ultra Stretch fabric side pockets with YKK AquaGuard zippers.

They are great for small items you want to reach quickly:

• Snacks
• Wallet
• Gloves
• Tools
• Power bank in a dry bag
• Headlamp
• Keys
• Trash from snacks

One pocket also stays usable when the cradle is wrapped around the rack without the dry bag.

What is it good for?

From our personal experience, pretty much everything.

• Bikepacking and off-road multi-day trips
  Pack clothes and sleeping gear in the dry bag. Put camp shoes or tent poles between the cradle and dry bag.
• Camping and picnic rides
  Kitchen stuff, towels, swimming suit, food, extra layers — all easy to pack and easy to remove.
• Commuting and city rides
  Carry your daily things without using a backpack.
• Shopping
  Yes, it works great! Except maybe fresh herbs and berries — they deserve a gentler life.

Compatibility

PackTrain works with many popular rear racks, including the following racks:

• ORTLIEB Quick Rack
• ORTLIEB Rack Three
• Tubus Cargo / Logo
• Tubus Vega
• Tubus Fly Classic
• Salsa Wanderlust
• Salsa Alternator Rack
• Axiom Streamliner
• Blackburn Outpost Rear Rack
• Mica Rat Tail
• Old Man Mountain Divide / Elkhorn style racks

Please check rack platform width and dimensions before ordering.

PackTrain cradle versions are available for 10 cm, 12 cm and 14 cm rack platforms.
Minimum required inner spacing between rack struts: 18 cm.

Materials

Cradle

• Challenge Sailcloth ECOPAK™ EPX200 laminated recycled polyester fabric
• Ultra Stretch™ fabric side pockets
• CORDURA® TPU-coated fabric reinforcement on the bottom contact area
• YKK AquaGuard® water-repellent zippers for the pockets
• ITW Nexus WSR CAM 20 mm side-release cam buckles for the closure straps
• Woojin Plastic® eyelets for strap positioning and water drainage

Dry Bag

• Challenge Sailcloth ECOPAK™ EPLX400 waterproof laminated fabric
• CORDURA® TPU-coated fabric reinforced bottom
• Seams taped with Challenge UltraTNT™ PSA Seam Tape

Dimensions

Cradle size: 18 × 46 cm
Fits racks with 10 cm, 12 cm and 14 cm platforms
Side pocket height: approximately 12 cm

Dry bag size when rolled three times:
Length: 32 cm
Width: 14 cm
Height: 35 cm

Volume: approximately 14L

Set includes

• Rack cradle
• 14L waterproof dry bag
• Pair of attachment straps

The cradle can also be purchased separately.

Small note from real life

The dry bag is made to carry gear, not furniture duty.
But if you are tired at camp and it somehow becomes a soft chair… well, we didn’t say that loud.

Custom color option

We can make the PackTrain bag in custom colour, fabric or size combinations.

Custom price = regular bag price in the chosen size and fabric + 10%

This is a good option if you want to match the bag to your frame bag, handlebar bag, rack bag or the overall look of your bike.

We charge only a deposit when you choose the Custom option on our website.

Turn your rear rack into a clean, modular cargo system — ready for bikepacking trips, daily rides, camping weekends and everything in between.