Bicycle
An object where cleaning it wrong is a mechanical risk rather than a cosmetic one — because the solvent that cleans the chain destroys the bearings.
What not to do
Pressure washer should be avoided for Bicycle
Best avoided
The available guidance advises against this.
The bicycle tool maker's limit is a hose at LOW pressure with a WIDE spray, and compressed air is never blasted at the bearings. A pressure washer is the opposite of both.
Evidence
Supported
Sources
Park Tool Co. · Manufacturer documentation
Relied on for: That a hose is used only at low pressure with a wide spray, that compressed air must not be blasted directly at bearings, and that keeping solvent out of the bearings is an explicit aim. (inferred from the source; not stated directly)
Precautions
- Check the manufacturer's instructions
- Ventilate the area
- Dispose of responsibly
Start here
What this is, what tends to go wrong with it, and what to do about it.
Which part are you cleaning?
These parts take different answers. Cleaning one the way you clean another is a common way to damage this.
- Bicycle chain
The dirtiest component on the machine and the one that must be lubricated immediately after it is cleaned. Cleaning it and stopping there causes wear.
Stainless steel
Things not to use here
- Bicycle cassette
Narrow gaps that trap grass, grit and old lubricant, sitting directly on top of a sealed bearing that solvent must not reach.
Stainless steel, Aluminium
Things not to use here
- Bicycle frame
Painted or lacquered tubing where the damage comes from grit under a cloth rather than from anything in the bucket.
Aluminium, Painted and coated steel, Anodised aluminium
Things not to use here
What tends to go wrong
A tacky lubricant loaded with road grit and metal, transferred as a sharply defined mark. The grit is what makes it more than a grease stain.
Why it is difficult: Why oil resists water, Adhesion and cohesion
The one stain where the first move is mechanical and the chemistry barely matters — and where the folk advice to let it dry first is not what the trade body says.
Hydrated iron oxide from corroding iron or steel. Distinguish a surface deposit, which cleans off, from active corrosion of the item itself, which does not.
Why it is difficult: Corrosion and passivation, Why old stains are harder, Adhesion and cohesion
- Mouldvia its material
A living growth, not a stain. Killing it and removing the staining are two separate jobs, and neither addresses the moisture that caused it.
Why it is difficult: Porous and non-porous surfaces, Moisture control and recurrence, Cleaning, sanitising and disinfecting, Organic load, Surface roughness
- Limescalevia its material
A hard, chalky calcium carbonate deposit left by hard water. Dissolved by acids, essentially untouched by detergents.
Why it is difficult: Water hardness, Crystallisation, Adhesion and cohesion
- Dustvia its material
Mostly textile fibres and skin, held by static as much as by gravity — which is why a dry cloth on a plastic surface makes it worse.
Why it is difficult: Static and dust, Mechanical action and abrasion, Why different surfaces get different dirt, Surface roughness
- Road salt· no established method
A white tidemark on boots, carpet and car sills that is also actively corroding whatever it is sitting on.
Why it is difficult: Chloride attack, Evaporative deposition
A concentrated water-soluble dye with nothing else in it. Nothing has to be emulsified or dissolved — the only question is whether the surface has taken the colour up.
Why it is difficult: Capillary absorption, Dye migration and colour bleeding
A sticky, yellow-brown tar film deposited everywhere at once. It is the reason a room smells after everything visible has been cleaned.
Why it is difficult: Adsorption of odour molecules, Solubility and polarity
Coloured by turmeric in most prepared mustards, and curcumin is a pH indicator — which is why an alkaline cleaner turns a yellow mark red.
Why it is difficult: pH indicators in stains, Fat-soluble pigments, Photodegradation, Pigment retention
The commonest cleaning problem that is not dirt. The tackiness is the plastic's own additive arriving at the surface, which is why wiping it off works for a week.
Why it is difficult: Plasticizer migration, Damage versus soiling
Four agents deep — solvent, detergent, vinegar, then ammonia — because it is pigment, sap and soil arriving together.
Why it is difficult: Pigment retention
The science behind this: Alkali attack on light metals, Solvents and polymers, Solvent crazing, Static and dust, Plasticizer migration
In detail
A bicycle is unusual in that the cleaning has consequences for how the machine works, not only for how it looks. The trade documentation sets the order first: begin with the dirtiest items, which is typically the chain and drivetrain, so that the grit being removed does not end up on surfaces already cleaned. Warm water is specified for the same reason it is at a sink, with a biodegradable dishwashing liquid or similar soap. Two agents in sequence do the drivetrain — a degreaser and then soapy water — because the combination is described as very effective at cleaning the chain and removing grit. Three constraints turn this from a wash into a procedure. Water pressure is bounded: if a hose is used, only low pressure with a wide spray, and compressed air must not be blasted directly at bearings. Solvent must be kept out of the bearings, to the point that the documentation prescribes leaning the wheel so the cogs face the ground. And the chain MUST be re-lubricated afterwards, run through a clean dry rag first and then given one drop per link. A grit detail generalises beyond bicycles: dirt trapped between a clamp jaw and the paint mars the finish, though the jaw itself does not.
Related
- Bicycle has the component Bicycle chain
- Bicycle has the component Bicycle cassette
- Bicycle has the component Bicycle frame
- Bicycle is made from Aluminium
- Bicycle is made from Painted and coated steel
- Bicycle is made from Natural rubber
- Bicycle is made from Household plastics
- Bicycle is commonly affected by Bicycle chain grease
- Bicycle is commonly affected by Mud
- Bicycle is commonly affected by Road salt
- Bicycle is commonly affected by Rust
Hacks and claims involving this
- Washing-up liquid on a bicycle Does not work
Sources for this page
Sources
Park Tool Co. · Manufacturer documentation
Relied on for: That the drivetrain is cleaned first, that a degreaser then a soap is very effective at removing grit, that a hose must be used only at low pressure with a wide spray, that compressed air must not be blasted at bearings, that the wheel is leaned to keep solvent out of the bearing, and that the chain must be re-lubricated at one drop per link. (states this directly)