Bakfiets washing: cleaning electrical parts safely

A cargo bike gets a lot of abuse. Mud, sand, brine and food scraps from the cargo box accumulate quickly, especially with daily use in the city.

Still, “just hose it down” is not always wise. Especially with an e-bike, you want to clean without slowing down brakes or letting moisture creep into electrical parts.

In this article, you will learn step-by-step how to wash a cargo bike without damage, with additional focus on the topic of bakfiets washing electric parts.

Why gentle washing is important

A cargo bike has more surface area than a regular bike and often more vulnerable areas. Consider cable passages, a large cargo box, often hydraulic disc brakes, and in electric models: motor, battery, display and connectors.

Improper cleaning can lead to squeaky brakes, rust on bolts, drying out rubbers or malfunctions due to moisture. It's a waste if a wash causes more maintenance than it prevents.

Common mistakes that cause damage

• Use pressure washer on bearings, motor, bottom bracket or hub.
• Get degreaser on brake discs or pads.
• Put the bike away wet without drying (especially in brine).
• Wet the battery and contact points and then charge immediately.

Supplies: this works safely and quickly

You don't need a special cleaning trolley. A few basic items will get you far, as long as you choose the right tools.

Handy washing kit for cargo bikes

• 2 buckets: one with suds, one with clean rinse water.
• Bicycle or car shampoo (pH neutral, without harsh degreasers).
• Soft sponge or microfiber glove.
• Soft brush (for tires, rims and bucket edges).
• Microfiber cloths (preferably several).
• Bucket/plant sprayer or garden hose on soft booth.
• Silicone spray or rubber conditioner (optional, for rubbers).
• Chain lube/belt cleaning recommendation appropriate for your drive.

Looking for practical gear that you often use with your bike anyway? Take a look at accessories for maintenance and daily rides.

Preparation: how to avoid hassles during washing

Proper preparation makes the difference between “equally clean” and “thorough but safe.” Preferably put your cargo bike in a place where water can drain away and where you can work quietly.

Step 1: choose the right place and timing

• Preferably wash in the shade: shampoo then dries less quickly.
• Avoid washes during frost (water can freeze in cables/connectors).
• After a ride in brine: rather rinse immediately with low water, than let it sit.

Step 2: make the e-bike parts “wash-ready”

With an electric cargo bike, the main rule is: avoid moisture at openings and contact points. Waterproof doesn't mean you can submerge everything or hose it down hard.

• Turn off the system and remove the key (if applicable).
• Take the battery out if it is easy to do so; in any case, do not let the battery get wet during washing.
• Protect display and buttons with a clean, slightly damp cloth working next to it (do not “soak” directly).
• Check that rubber caps over charging ports/connectors are tightly sealed.

Bakfiets washing in 7 safe steps

The sequence below works well for both longtail and bucket models with two or three wheels. The principle is simple: remove loose dirt first, then wash, then rinse and dry in a controlled manner.

1) Remove dry dirt

Start by brushing away sand and dried mud, especially around the wheel wells, fenders and underside of the body. This will prevent you from creating a sandpaper effect on paint and decals with a sponge.

2) Careful pre-rinsing

Use a watering can, plant sprayer or garden hose with a soft jet. Never aim directly at bearings, motor, bottom bracket, headset or hubs.

For disc brakes: do rinse lightly over the caliper and disc, but keep your distance and avoid soap in this area.

3) Wash frame and tub with pH-neutral shampoo

Work from top to bottom. This way dirt will naturally wash down and keep your sponge clean.

• Use the “two-bucket method” (suds + rinse).
• Pack gaps around the tray and edge profiles with a soft brush.
• Be careful not to leave too much water in the bottom of the container.

4) Tackling wheels, tires and fenders separately

Wheels are often the dirtiest. Preferably use a separate brush or cloth for this, so you don't smear brake dust and sand all over your frame.

On a three-wheel cargo bike: don't forget the inside of the front wheels, where dirt accumulates quickly.

5) Braking: clean without losing braking power

Brakes are susceptible to contamination. Disc brakes in particular can squeak or bite less if shampoo, oil or degreaser gets on disc or block.

• Around the brake discs, preferably use only water and a clean cloth.
• Do not touch brake discs with greasy hands or a “drive cloth.”.
• If you accidentally get soap on the disk: rinse immediately and dry afterwards.

Doubting whether your brakes still feel good after washing? Take a short test drive and brake firmly (safely, without traffic) a few times to get the discs dry and up to temperature.

6) Electrical parts: cleaning without wet misery

Here comes the core of bakfiets washing electric parts. You want to clean, but without water pressure and without allowing liquid to run into connectors.

• Engine: wipe with a damp microfiber cloth; no directed jet on seals.
• Battery room: remove dust and sand with a dry cloth; in case of stubborn dirt, damp slightly, then dry well.
• Contacts: dry cleaning only; do not use spray or grease unless explicitly recommended by the manufacturer.
• Cabling: remove carefully; do not pull on cables or pry open caps.
• Display/control: wipe lightly damp, then wipe dry.

7) Replay and dry immediately

Do the final rinse briefly and in a controlled manner. The less water you use, the less chance of intrusion at bearings or electrical connections.

Then dry immediately: frame, body, bolts, chain guard/belt area and especially the areas around connectors and battery opening.

Pressure washer: when really not to do it

A pressure washer is the fastest way to force water past seals. This is especially true with cargo bikes, as they are often subjected to heavier loads and therefore bearings and pivot points already have a lot to endure.

Avoid high pressure in any case:

• Bottom bracket and crank area.
• Ball head bearing (at the front fork/steering column).
• Wheel hubs and bearings of front wheels (especially on tricycles).
• Motor housing, sensor areas and cable entries.
• Calipers and brake discs (splashes dirt and grease right around).

After washing: small actions that save a lot

A cargo bike may look clean after washing, but the “damage” often occurs afterwards. With a short post-treatment, everything stays smooth and prevents squeaks and rust.

Checking and drying check (5 minutes)

• Check that the tray is dry, especially under mats or cushions.
• Visually check bolts and pivot points for water droplets.
• Check tire pressure (dirt gone = chance to inspect immediately).
• Brake test: drive off slowly and brake a few times.
• Electronics: do not turn on until everything around battery/contacts is dry.

Lubrication: only where it should be

Lubrication is important, but don't overdo it. Oil splashing around on brakes or tires actually makes your cargo bike more unsafe.

• Chain: after drying, re-lubricate with suitable chain oil and wipe off excess oil.
• Belt drive: usually no oil; follow the maintenance recommendation of your belt system.
• Hinges/stand: a drop of suitable lubricant can prevent squeaking.

Persistent dirt: brine, tar and stains in the bin

Daily use sometimes produces stains that shampoo will not remove. Think tar, chain grease, shoe marks or food scraps.

Brine and winter dirt

Brine is notorious for retaining moisture and accelerating corrosion. In winter, rinse rather more often light Then occasionally very thoroughly with lots of water.

More background on what salt and winter conditions do to materials can be found at Wikipedia on road salt.

Tar and grease splashes

• Use mild citrus cleaner on a cloth, but keep it away from brakes.
• Test on an inconspicuous area first (paint, decals and plastic may react).
• Work locally, not “inject everything.”.

The bin itself: hygienically clean without damaging material

In the tub, you often want not only nice, but fresh. Use mild soapy water and limited rinsing so no water remains under upholstery or in cracks.

• Take out loose pillows/mats and let them dry separately.
• For corners, use a soft brush or old toothbrush.
• Then let the tray dry open (preferably out of the rain).

How often should you wash a cargo bike?

It depends on your rides. A cargo bike that goes through rain and city street grime daily needs a short “rinse and wipe” more often than a bike that is mostly dry indoors.

Practical frequency for daily use

• Weekly: light wiping of frame, bucket edge and lights + brake check.
• Every 2-4 weeks: full wash as above.
• After brine/mud: rinse and dry briefly the same day.

When better to have it checked?

Sometimes dirt is not the real problem, but the symptom. If you still notice problems after washing, it's smart to have a specialist take a look.

• Brakes continue to squeak or feel “slippery.”.
• Electric support falters after wet weather.
• You hear creaking when steering or pedaling (possibly bearings).
• There is play on wheels, handlebars or bucket assembly.

In that case, schedule maintenance via STOER Care service and maintenance, or check your papers and conditions in documents and manuals. Then you can be sure that everything remains safe, even with intensive daily use.

Finally, clean without stress

Washing a cargo bike doesn't have to be exciting, even with electric assistance. If you avoid water pressure, keep brakes clean and electric parts mostly wiped down rather than hosed down, your bike will remain reliable.

Want someone to give your cargo bike a professional check or service after a wet spell? Then take a look at STOER Care and schedule a time that suits your use.