Spatium SUP Inflatable Water Bike 2.0 – Stable Pedal Kayak Pedal Boat for Lakes, Easy-Drive Inflatable Watercraft for Outdoor Adventure & Fitness

Two hulls, not one board

A paddleboard asks you to balance before it gives you anything back. This does not ask. There are two separate inflatable hulls running parallel and set well apart, and the frame sits in the gap between them — so you are sitting on a saddle above the water on a base that is wider than it is tall, not standing on a single floating plank.

That is the whole design argument. Spread the flotation across two hulls set well apart and the craft stops caring what you do with your weight. It is why a first-timer can get on it and pedal away instead of spending the first hour falling in.

If you can ride a bicycle, you can ride this

There is nothing to learn. You sit on a bicycle saddle, hold a bicycle handlebar and turn bicycle pedals. Pedalling forward drives you forward. Pedalling backward drives you backward — which is the trick nobody expects, and the reason coming off a dock is undramatic. Turning the bars turns the propeller, so the craft steers from the same place your hands already are.

The drive is a toothed belt from the chainring back to a sealed gearbox, then down a slim leg to an aluminium surface-piercing propeller. There is no engine and no battery, so there is no noise beyond the water — which matters more than it sounds if you fish, or if you want to get near birds.

The propeller lifts, which is what saves it

A fixed propeller on an inflatable is a blade waiting to meet a gravel bottom. This one is on a leg that swings up and locks, so you launch and land with it raised and drop it once you are clear. Spatium rates the drive as working in water as shallow as 50 cm (about 20 in). In practice that is the difference between a craft you can put in anywhere there is a bank, and one that needs a slipway.

No trailer. That is the actual point.

Most people who want a boat never buy one, and it is almost never the boat that stops them. It is the towing, the ramp, the mooring, the winter storage and the fees — a permanent commitment for a dozen weekends a year.

This comes apart on quick-release clamps. The frame weighs about 21 kg (46 lb) and Spatium's own manual says it goes in the boot of an ordinary family car; the two hulls deflate and roll into the carry backpack that comes with it. It lives in a cupboard, not in a marina.

Setting it up, honestly

It is eight steps in the manual, and most of the clock is the pump. A two-way hand pump is in the box — you do not need to buy one, and you do not need mains power or a compressor.

• Inflate the hulls first, part way. Bolt the frame together, clamp on the handlebar and saddle, screw in the pedals.
• Sit the frame across both hulls and strap it down — four velcro straps, then two hooks per cross bar into the hulls' D-rings.
• Then finish inflating. Spatium recommends this order because a soft hull is far easier to line up with the frame than a hard one.
• Fit the propeller last: blade onto the shaft, leg into the stern clamp, and clip the safety carabiner to the frame.
• Take it apart the same way. Rinse with fresh water and dry it before it goes back in the bag.

Pressure, and the mistake that catches people

The hulls are drop-stitch PVC — the same construction used in stiff paddleboards, two layers of skin held apart by a dense weave of internal threads, which is what lets a fabric hull behave like a rigid one. Drop-stitch only works at pressure, so this is a number worth knowing.

Spatium's ceiling is 1 bar / 15 PSI, and their manual is explicit that you should not exceed it. It is also explicit about the trap: in hot sun, or on a dark-coloured hull, keep the pressure down to 10–12 PSI, because the trapped air heats and the pressure climbs on its own while the craft sits on the bank. Several of the twelve colourways here are dark ones. Worth knowing before you pick.

What is in the box

Taken item for item from Spatium's own packing list, not from a marketing bullet:

• Bicycle body frame × 1, handlebar × 1, saddle × 1, pedals × 2
• Cross bars × 4 — the tubes that join the frame to the hulls
• Inflatable pontoons × 2
• Detachable propeller × 1
• Manual two-way hand pump × 1
• Screw kit × 1 and repair kit × 1 — bolts, spanners, patches and adhesive
• Carry backpack × 1

What we are not claiming. Spatium's assembly guide has a step for an inflatable deck that sits between the hulls, and the deck appears in their component diagram — but it is not on the packing list in any language edition of their manual, and their retail listings disagree about whether it ships with this model. So we are not listing it. The same goes for the handlebar basket, phone mount and cup holder: the manual shows you how to fit them, which is not the same as saying they arrive. If any of those is the reason you are buying, ask us first and we will confirm in writing with the manufacturer before you order.

The one job that decides how long it lasts

Rinse it with fresh water and dry it before it goes away. That covers the hulls and the frame.

The part worth being straight about is the propeller. Inside that leg is a spring-type flexible shaft, and Spatium's manual says plainly that it is made of steel and cannot be treated for corrosion resistance — their instruction is to oil it regularly, and if rust does appear, to clean it off with WD-40 and then protect it with machine oil. That is a maintenance job, not a fault, but it is the reason we are not going to tell you this thing is immune to salt water.

Before you go on the water

These are Spatium's own safety instructions, reproduced rather than paraphrased. Read the manual that comes with it before the first ride.

• Always wear a personal flotation device. A buoyancy aid or life jacket is not supplied with this craft. Sourcing one that fits you, and wearing it every time however well you swim, is on you.
• Not for use by anyone under 14 years of age. This is a single-rider adult craft.
• Fully inflate both hulls before use, and do not exceed the maximum load.
• Not for whitewater or rapids, and not for breaking waves. Calm inland water — lakes, reservoirs and sheltered flat water.
• Stay within a safe distance of the shore — Spatium says 150 m maximum. Check the wind before you set off: an offshore breeze carries you out far faster than you pedal back.
• Tell someone where you are going, and check local rules. Many inland waters need a permit or licence even for unpowered craft.

This craft carries no coastguard, ISO or CE marine approval, and we make no claim of one.

Frequently asked questions

What weight will it carry?

We are not going to print a number, and here is why. Spatium's own documents give four different answers — the manual's feature page says 130 kg, the safety checklist two pages later says a 200 kg maximum load, their website says 150 kg, and their retail listings say 350 kg. Those cannot all be right. If your weight is anywhere near the question, email us before you order and we will get a figure in writing from the manufacturer rather than guess on your behalf.

Do I need to buy a pump?

No. A manual two-way hand pump with a pressure gauge is on the packing list and comes in the box. An electric pump is optional convenience, not a requirement.

How long does setup take?

Spatium does not publish a figure and we are not going to invent one. It is eight steps, the bolt-together part is quick, and the pump is the bulk of it. Expect your first assembly to take considerably longer than your fifth.

Can I use it on the sea?

It is built for calm inland water. Spatium's safety guidance rules out breaking waves and rapids and asks you to stay within 150 m of shore, which is not compatible with open sea. Sheltered coastal water in settled conditions is a judgement call you are making yourself — and if you do take it in salt, rinse it with fresh water afterwards without fail, because of the propeller shaft above.

How shallow can I take it?

Spatium rates the drive to about 50 cm (20 in) of water. Shallower than that, lift the leg and let the hulls carry you — they draw very little.

What happens if I puncture a hull?

A repair kit is in the box. Spatium's procedure: deflate fully and dry, cut a patch that overlaps the damage by at least 2 in on every side, clean the area with alcohol, apply three coats of adhesive five minutes apart, roll the patch down, then leave it a full 24 hours to cure before re-inflating. It is not a lakeside fix — plan for the day after.

Does it fit in a normal car?

Spatium's manual says the quick-release frame goes in the trunk of a typical family car, and the deflated hulls roll into the supplied backpack. No trailer and no roof bars. We have not measured it into a specific model, so if your boot is unusually small, measure before you order.

Which colour should I choose?

Twelve colourways, all the same craft underneath. The one practical consideration is heat: on a dark hull in strong sun, Spatium asks you to hold 10–12 PSI rather than the full 15, because dark PVC gains more heat and the internal pressure rises with it.

Can two people ride it?

No. One saddle, one set of pedals, one rider. Spatium sells a separate tandem model; this is not it.