For Riders Going Further

Use Coupon Code KEEPONCRANKIN for 10% off all items when you spend AU$100 or more.

Keep on Crankin’

We are still operating and able to take and ship orders.

Things are not quite normal at the moment but we are continuing  to process and ship orders for Cranktank4 and accessories. This applies to the majority of international as well as domestic orders. (Please contact us for confirmation for international destinations. For more information see here:  For urgent shipments, please contact us for a DHL Express quotation.)  

Whatever your situation might be, I hope that you are able to still dream about and plan that next adventure on your bike. Let’s hope that the opportunity to undertake it is not too far away. And if you’re thinking that you’d like to add the Cranktank4 to your equipment list, use KEEPONCRANKIN in the coupon code area for 10% off all items in the store.
Stay safe and look after one another.




Cranktank4 is a different and very easy way to carry and access a larger quantity of water on your bike.

Conceived with the more remote traveller in mind, we have come to realise that it is also a great piece of kit to have even when just heading off on a big day out. No more detours to find water.

When designing the CrankTank4, we had these objectives.

  • Large capacity
  • Easy and safe access for drinking while on the move
  • Space efficiency
  • Minimal impact on handling when full
  • Securely mounted but still quick and easy to remove
  • Robust and lightweight
  • Able to fit as many conventional double triangle frames as possible

We reckon we did what we set out to do.


These two bottles hold 1350ml of Water.

CrankTank4 holds 4 Litres of Water in less frame space.

Kosciuszko National Park NSW, Australia


You, like us, like to ride.

On longer adventures, whether it’s for a day or a few, carrying enough water on our bikes is often a challenge. The usual solutions have been bottles mounted in various locations about the bike, a hydration pack on the back, a bladder in a frame bag, an unwanted detour or various combinations of these. Well, they all work, but we were looking for something a bit different. Something that just made it easy.


We came up with a list of attributes that we wanted in a water carrying device that we could use on any ride, be it just a quick one or for a self contained trip. They are:

  • To be able to carry enough for riding all day when hot or 24 hours in milder conditions. So 4 litres
  • To carry it on the bike and in a position where it has minimal impact on handling when full. That meant low and central
  • To use no more frame space than two standard bottles. Ideally less.
  • To mount securely but still be quick and easy to remove
  • To be able to drink from it easily and safely while on the move
  • To be robust but lightweight for the capacity
  • And it had to fit as many conventional double triangle frames as possible

Thinking was done, ideas were formed and toil took place and we’re excited to bring the first of those ideas into reality and to make it available to our riding community.


Against the list? Well, it does mount super securely and low in a wide range of frames and is quick to remove. It’s easy and safe to drink from on the move via the insulated tube with bite valve, it occupies a little less frame space than two bottles, weighs about the same as three mounted, but carries 4 litres (more than 5 standard bottles). And, even when full, it has minimal effect on bike handling.

It IS different and DOES challenge the norms, but, if you’re looking for the same things we were, it can’t be denied.

What to call it? How about CrankTank4?

You’ll find the CrankTank4 Kit and other associated products in our store.



Why Cranktank4?

The Cranktank4 is a uniquely shaped food grade polyethylene container designed to sit low into  the space between the down and seat tubes of conventional double triangle frames.

The “V” profile indents in the front and rear facets allow positive location into most frames without any additional hardware and it secures quickly and simply with two hook and loop “D” buckle straps.

A broad range of tube profiles and sizes and frame angle variations are accommodated by the design. Rounded profile down tubes up to around 50 millimetres are fine and even some squared off profiles work well also. Really broad squared off tubes may require use of the optional Wedgie mount which simply bolts to standard bottle cage bosses. Cranktank4 then locates onto the Wedgie.

The insulated drinking tube with bite valve includes a quick disconnect fitting to allow rapid release from the tank cap so the tube can stay on the bike while you refill. The tube is supplied at 120cms (47 inches) in length for taller riders and is easily made shorter if required.

Also in the kit is a tube keeper which can be fixed in your desired position (handlebar for me) using the included zip ties. The tube is easily accessed while on the move and held securely when not drinking.

The tank has been designed with a relief to the lower section of the seat tube face which provides clearance for most cable operated derailleur mounts. Use of an electronic derailleur will most likely require the use of the optional Wedgie mount fitted to the seat tube cage mounts.

Will it Fit my Bike?

Cranktank4 has been designed with the aim of fitting as many double triangle frames as possible. So touring bikes, gravel bikes, road bikes all the way through to mountain bikes. You’ll find photos on our Instagram page giving you an idea of the broad range of frames it is suited to. The main limitations are small mountain bike frames with heavily dropped top tubes and gravel style bikes with hockey stick style down tubes.

It is designed to sit flat along its length against the down tube and slide down (and back) to locate on the seat tube. (Most curved seat tubes are fine.) This provides for very secure location in the frame.

To make sure it fits your frame, take a measurement at 90 degrees to the down tube across to the junction of the seat and top tubes. ( See diagram. The red line is the measurement position.) For down tubes around 38 mm in diameter, the measurement should be 240 mm minimum. For down tubes around 50 mm in diameter, it should be a minimum of 245 mm. For squared off tubes often utilised on carbon or aluminium frames or for use with the Wedgie mount, the measurement should be minimum 250 mm.

Isn't drawing the water from that low on the bike difficult?

Care has been taken to make the inside diameters of the various components as large as possible to remove any restrictions. Comparing the required effort for the Cranktank4 to various backpack style hydration packs, tests show it fits in mid range effort.

When used correctly, water remains in the tube once primed, even when the tube is disconnected from the tank for refilling. (Catch the disconnected end somewhere around the handlebar to make sure.)

Is it heavier than bottles?

The weight ready to fit is around the same as three standard 750 ml bottles and their cages. Taking into account that the Cranktank4 has the capacity of more than five standard bottles it has the potential to save weight.

Any Effect on Riding?

Being situated low in the frame, even when full Cranktank4 has little to no effect on the handling of the bike and the hook and loop retaining straps ensure it is very securely fixed in position and remains in place even in the roughest terrain. No more lost bottles and their contents.

Can I get Replacement Parts?

Lost a component or need a replacement? You’ll find spares in our store and if it’s not there just get in touch. We’ll be happy to help you out.

CRANKTANK4 Accessories

Prices are in Australian Dollars



I don’t know about you, but one of my dislikes while out on the bike on a hot day is drinking water from a bottle that is the temperature of a cup of tea. While it’s not exactly a fridge, the CrankTank4 Neoprene Cover provides insulating properties to keep the water cool while adding some visual appeal.

The cover fits simply over the tank and fixes securely around the seat and down tubes using hook and loop fasteners. It takes just a few seconds to fit.

All the rage grey contour pattern with Adventure Hydration logo in the top corner.



  • 4 mm printed neoprene with hook and loop fasteners
  • Weight: 145 grams.



A choice of tube keepers for hydration system drinking tubes fitted with an insulated cover (or taped to an appropriate diameter) as supplied in the CrankTank4 Kit.

New! Top Loading Tube Keeper now re-designed for greater holding power while maintaining ease of access.

Available soon! Side Loading Tube for even more tube security.

These keepers are designed to be fixed to round tubes (handlebar, top tube etc) in either of two orientations.

Ideal for if you’re using CrankTank4 on a second bike or even for use with a bladder in frame bag set-up.


  • 1 3D Printed Tube Keeper
  • 1 piece Self Adhesive Rubber Strip
  • 2 Cable Ties



This is the 120 cm length Insulated Tube with Bite Valve as supplied in the Frametank4 kit. It can be supplied with the standard female quick disconnect fitting as used in the Frametank4, with a male quick disconnect fitting for use with Camelbak bladders or with no quick disconnect fitting.

Ideal as a longer replacement for using with a bladder in a frame bag.


1 x 120 cm length Insulated Hydration Tube with Bite Valve and Camelbak style male quick disconnect fitting. (Left pic.)


1 x 120 cm length Insulated Hydration Tube with Bite Valve. No Fittings (Middle pic.)


1 x 120 cm length Insulated Hydration Tube with Bite Valve and CrankTank4 female quick disconnect fitting. (As supplied with CrankTank4 kit.) (Right pic.)



Plain cap without fittings for use in camp or if Frametank4 is just required for carrying water and not drinking on the bike.


  • 1 Plain Cap with O ring seal.



Pack of three Silicone Bite Valves for use with most hydration tubes. Suitable for tubes with outside diameter of around 9 mm to 10 mm. These bite valves simply slip onto the tube or tap fitting.


  • 3 x Silicone Bite Valves
Out Of Stock



The Sawyer 3.78 litre (1 US Gallon)Water Bladder is a lightweight robust solution to provide extra capacity and can also be coupled to the Sawyer Micro Squeeze Filter to form a gravity filtration system ideal for topping up your CrankTank4.

Ideal for bikepacking, touring, backcountry camping, and emergency preparedness, the reservoir features a wide mouth cap that allows for fast and easy filling and also a convenient carry handle.

Kit Includes:

1 – 3.78 litre (1 US Gallon) Water Bladder


  • Wide Mouth for Fast Easy Filling
  • Compatible with the Sawyer MINI, Micro, and Squeeze Filters (not included)
  • 110 grams.
  • Convenient Transportation Handle
  • 3.78 L (1 US Gallon) Capacity



Enjoy clean and safe drinking water wherever you roam with the ultra-compact, lightweight, reusable Sawyer Micro Squeeze Water Filtration System.

With a total field weight of 56g, this tiny filter fits in the palm of your hand.  While small in size, the powerful Micro Squeeze removes 99.99999% of bacteria (salmonella, cholera and E. coli) and 99.9999% of protozoa (cryptosporidium and giardia) — exceeding EPA recommendations for removal rates.



Kit Includes:

  • 1x Micro Squeeze Filter with Push/Pull Cap
  • 1x 1 Litre Ultralight Collapsible Pouch
  • 1x Backwashing Plunger
  • 1x Cleaning Coupling (To connect the pouch or a 28mm threaded beverage bottle to filter outlet for backwashing.)
  • 1x Spare Gasket
  • 1x Drinking Straw (To attach to the filter inlet to drink directly from a water source.)



The Wedgie fixes to the frame using the standard two boss bottle cage mount. It provides positive location for the CrankTank4 when extra clearance is required or frame profiles restrict.

It is designed for use on the seat tube when extra clearance is required for a derailleurs or for use on down tubes for cable stop clearance or for those that utilise broad, squared off profiles as often seen with carbon or aluminium frames.


  • 1 3D Printed Nylon Wedgie
  • 2 x 5mm Stainless Bolts
  • 2 x 5 mm Stainless Washers

Kosciuszko National Park NSW, Australia

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