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Bicycle chain lube: which one, how to apply it — and how often

Clean first, then lubricate. What the manufacturers actually say, what wrecks a chain — and why Shimano and SRAM refuse to name a kilometre figure.

Last updated: September 2026 · every figure is sourced where it appears

Short answer

Clean first, then lubricate. A dry rag is enough for everyday riding; for heavier dirt use lukewarm water with washing-up liquid (KMC) or a mild, biodegradable cleaner (SRAM). Dry the chain, then one small drop per link and wipe the excess off — SRAM say so in as many words. Never rust removers or anything acidic or alkaline: Shimano, SRAM and KMC all warn the chain can become brittle and break. Never a pressure washer. Wet lube for rain, dry lube for dust (Park Tool). And WD-40 is not a chain lubricant — the manufacturer describes it as a water displacer.

Wet lube or dry lube?

This is the question the search data says you are actually asking, and the answer is a genuine "it depends" — with a clear rule behind it. Park Tool draw the line by conditions, not by brand.

Wet vs dry lube — documented properties
	Wet lube	Dry lube
Strength	thicker, holds up in damp and rain (Park Tool)	attracts less dirt, suited to dry and dusty riding (Park Tool)
Weakness	dry grit sticks to it more readily	washes off faster in rain
Off-road	Zero Friction Cycling: no wet lube on trails — dust sticks immediately	suitable

The uncomfortable part comes from the independent testing. Zero Friction Cycling run every chain through identical 1,000 km blocks — clean first, then with dust, then wet — and measure how far each one stretches. The differences between products are large. But ZFC also measure that under harsh conditions every lubricant collapses to 50–200 km of useful life. No product buys you out of that.

Why WD-40 is not a chain lube

It is the single most common mix-up, and the clearest answer comes from the manufacturer. WD-40 describe their Multi-Use product as something for displacing water and protecting against rust — a thing to use after washing the bike. Park Tool place it among penetrating fluids, not chain lubricants.

So: driving water out of a chain after a soaking is a job it can do. Lubricating the chain afterwards is a different job, and it needs a different product on top.

Clean the chain first — and why that is not optional

Zero Friction Cycling put a number on it: re-lubricating delivers roughly 0.03–0.05 ml of fresh lubricant per link. If the old lubricant is already full of grit, you have just added oil to grinding paste. This is the routine Park Tool, KMC and SRAM describe for an oiled chain.

E-bike: take the battery out first. Bosch require this before any work on the chain — the bike can switch itself on if you turn the pedals backwards.
Check wear before you start. Park Tool: if the chain is past its limit, skip the cleaning and replace it. Their CC-3.2 gauge reads 0.5 % and 0.75 % elongation; SRAM name 0.8 % for Eagle drivetrains.
Get the loose dirt off with a brush or a plastic scraper.
Run the chain through a rag. Crank backwards with the rag wrapped around the lower run. KMC start with a dry rag — a wet one washes grit deeper into the links.
Heavier dirt: use a cleaner. KMC name lukewarm water with washing-up liquid, SRAM biodegradable cleaners only, Park Tool a degreaser — in a chain scrubber with at least 30 backward crank turns. Do not soak the chain (SRAM).
Rinse and dry. SRAM: rinse thoroughly with water and let it dry. Park Tool: pull it through a clean dry rag and air-dry.
Then lubricate. One small drop per link, let it work in, wipe the excess off. Keep it well away from the brake rotors and pads — Shimano warn that oil on either ruins braking performance.

What to clean with — and what destroys a chain

Cleaning agents for an oiled chain — what manufacturers and trade sources say
Agent	What the sources say	Verdict
Dry rag	KMC: the first step of any chain care	enough day to day
Washing-up liquid	KMC: lukewarm water with washing-up liquid · Park Tool: a good dish soap works	good
Degreaser / chain cleaner	Park Tool use a degreaser · SRAM: biodegradable cleaners only, aggressive agents can wash out the factory lubrication · KMC: aggressive degreasers strip the factory grease from the pins and shorten chain life drastically	mild yes, aggressive no
Rust remover, acidic or alkaline agents	Shimano, SRAM and KMC agree: the chain can become brittle and break	never
Petrol, kerosene, diesel	Park Tool rule out flammable liquids as cleaners · Bosch: keep fuels away from the drive unit	no
WD-40	WD-40 themselves: for displacing water and protecting against rust after a wash	not a chain lube
Isopropyl alcohol	ZFC and Silca: as a final rinse or to wipe dust off — mainly with wax	not a main cleaner

Soaking is a real contradiction in the sources. SRAM forbid putting a chain or cassette into cleaning fluid — it can make the chain brittle. Zero Friction Cycling and Silca do use solvent baths off the bike, but for a different purpose: stripping a chain completely bare before waxing it. For an oiled chain, follow the chain makers: do not soak, do not wash the factory grease out of the pins.

Pressure washers: no. Shimano write not to wash the bike with high pressure, because water gets into components and causes malfunctions or rust. Bosch exclude pressurised water for all e-bike components, SRAM for their AXS parts. Park Tool recommend low pressure and a wide spray when washing a bike.

How to apply it: one drop per link, then wipe

SRAM say it in three words in their user manual — wipe off excess lube. Lubricant belongs inside the rollers, where the wear happens. What sits on the outside of the plates does nothing but collect grit and fling onto your rims.

The exception is drip wax. Squirt explicitly tell you not to wipe theirs off, because the carrier has to evaporate and leave the wax behind. Read the bottle rather than the habit.

How often — the only figures that are actually published

Here the honest answer annoys people, so it is worth being precise about who says what. Shimano write that the intervals between maintenance depend on use and riding conditions. SRAM are asked this exact question — "How often should I lube my chain?" — and answer with conditions and frequency of use. Neither names a distance.

An "every X km" rule with a Shimano or SRAM badge on it is therefore editorial guesswork, not a manufacturer specification. Others do commit:

Care and lubrication intervals — only figures that come from the source
Source	Interval	Applies to
KMC	ideally after every ride, at the latest every 250 km or once a month	oiled chains, road
KMC	at the latest every 100 km	oiled chains, MTB, cyclo-cross, high mileage
Rohloff	clean and re-lubricate after rides in the rain	derailleur chain
Rohloff	at least every 500 km	derailleur chain, viscous chain oil
Rohloff	roughly every 1,000 km	hub gear chain
KMC	every 150–200 km	wax, dry roads
KMC	every 100–150 km	wax, mud and off-road
Squirt (drip wax)	roughly 50–480 km per application	strongly condition-dependent
Silca (Super Secret Drip)	every ~240–320 km	drip wax

Worth noticing: several dry lube makers publish no interval at all. Most of the industry declines to commit — because honestly it cannot.

Wet weather sets the interval, not distance

Rohloff explain the mechanism: re-lubricating after a ride in the rain is necessary so the oil pushes the water that has worked into the joints back out, and prevents corrosion. KMC say the same — after wet riding, clean, dry, re-lubricate.

How much wet weather matters shows up in the ZFC raw data, where each chain runs identical blocks: clean, then dusty, then wet.

Chain wear, measured in chains until 0.5 % elongation — ZFC raw data
Lubricant	after 3,000 km (clean + dust)	then ONE wet block (1,000 km)
Silca Super Secret Drip	0.075	0.444
Finish Line Dry	0.769	1.312

One wet block costs the Silca chain roughly five times the wear of the 3,000 km before it. That is the whole argument for letting conditions drive the interval instead of a number on a calendar.

E-bikes: same chain care, more measuring

Safety first: Bosch require the battery to be removed before any work on the chain — the bike can switch on if the pedals are turned backwards. High-pressure and steam cleaners are out for motor and battery.

Does an e-bike chain need more care? Not fundamentally. But it is worth measuring more often: a mid-motor drives the chain considerably harder, so it reaches its wear limit sooner.

Common questions

What is the best lubricant for a bicycle chain?

There is no single answer, and the honest version is that it depends on conditions. Park Tool splits the field in two: wet lubes are thicker and hold up in rain and damp, dry lubes attract less dirt and suit dry, dusty riding. Independent wear testing by Zero Friction Cycling shows the gap between products is large — but also that under harsh, wet conditions every lubricant drops to roughly 50–200 km of useful life, no matter how good it is. Pick for your weather, not for the label.

Can I use WD-40 on a bike chain?

Not as a chain lubricant. WD-40 themselves describe the Multi-Use product as a water displacer and rust protector — something to use after washing the bike, not to lubricate the chain with. Park Tool lists it among penetrating fluids rather than chain lubricants. Use it to drive out water if you must, then apply a proper chain lubricant on top.

How often should I lube my bike chain?

Shimano and SRAM deliberately give no kilometre figure: Shimano writes that maintenance intervals depend on use and riding conditions, and SRAM answers this exact question by pointing at conditions and frequency of use. Manufacturers who do commit: KMC says at the latest every 250 km or once a month for road use, and every 100 km for mountain biking; Rohloff says at least every 500 km for derailleur chains. The real trigger is wet weather, not distance.

Do I need to clean the chain before lubricating it?

Yes, and Zero Friction Cycling put a number on why: re-lubricating adds only about 0.03–0.05 ml of fresh lubricant per link, on top of old lubricant that is already carrying grit. You are adding oil to grinding paste. A dry rag is enough for everyday riding; for heavier dirt KMC name lukewarm water with washing-up liquid, SRAM biodegradable cleaners only, Park Tool a degreaser.

What should I never use to clean a bike chain?

Rust removers and anything acidic or alkaline. Shimano, SRAM and KMC all warn that these make the chain brittle and it can break. Park Tool also rules out flammable liquids such as petrol, kerosene and diesel as cleaners. And no pressure washers: Shimano, SRAM and Bosch all exclude pressurised water, because it drives water into bearings and flushes the lubrication out.

How much lubricant should I apply?

One small drop per link, let it work in briefly, then wipe the excess off. SRAM put it plainly in their user manual: wipe off excess lube. Surplus on the outside of the chain does nothing except collect dirt. Drip waxes are the exception — Squirt explicitly say not to wipe theirs off.

Sources

Das rechnet BikeCare für dich

Because the interval depends on wet weather and conditions rather than distance, BikeCare reminds you when it is actually due — your rides feed in automatically, and a wet one counts for more than a dry one.

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