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How to lubricate a bicycle chain?

This post will explain basic things about bicycle chain maintenance. First there will be a few words about chain function, as well as chain and chainring wear, then chain cleaning techniques, followed by chain lubrication methods. Finally it will give some rough recommendations of chain lubricants. For detailed explanation of various chain lubricant types and their characteristics, read this (rather long) post: Bicycle chain lubricants – explained. For a short recommendation, see: The best bicycle chain lubricant.


  1. Bicycle chain role (function)
  2. Bicycle chain wear (“stretch”) and sprocket/chainring wear
  3. When to replace a chain?
  4. Cleaning a bicycle chain
    4.1. Jar with paint thinner
    4.2. Special chain cleaning gadgets
    4.3. Rag (and a brush)
    4.4. Ultrasonic jewellery cleaner
    4.5. Cleaning the other drivetrain components
  5. How to lubricate a bicycle chain
  6. Which chain lubricant is the best
  7. When (how often) should a chain be lubricated?

1. Bicycle chain role (function)

 Bicycle chain is used to transfer pedaling force to the rear wheel. It does so through at least two chainrings (front and rear), and sometimes derailleur. In order to work efficiently, it needs to match chainring teeth, as well as to bend smoothly. It is usually open, exposed to grit, moisture and pedaling forces. Because of all that, even when well maintained and lubed, chain wears gradually.

2. Bicycle chain wear (“stretch”) and sprocket/chainring wear

When a bicycle chain gets worn, visually it gives impression of being stretched, elongated. The elongation happens not because the chain steel is stretched, but because chain pins get thinner, worn. Detailed (and longer) explanation of the phenomena is in this post: Bicycle chain wear (elongation).

Streaching wearing bicycle chain
Chain elongation. The effect noticed is “stretch”, chain being longer, but it results not from material stretch, but from wearing of bushings and pins.
Worn chain pin
Worn chain pin

After chain elongation reaches a certain point, the chain starts climbing on the chainring (sprocket) teeth. The final stadium of this process is that only one or two teeth at a time carry the load, which accelerates chainring wear (as well as further chain wear).

Stretched worn bicycle chain
Worn (elongated) bicycle chain rides higher on chainring (sprocket) teeth.

Because of this, if worn chain is not replaced in time, it will result in chain slipping off chainring teeth when under load (felt as pedals falling freely for short time when pedalling with force, or rear wheel slipping), perhaps even breaking, as well as probable full drivetrain replacement (both rear and front chainrings will quickly become worn when used with an elongated chain).

Rear sprocket wear is not (easily) visible (only with special measuring tools), but if a new chain “skips” over (some) sprocket(s), it is a sure sign of worn sprockets.

Worn front chainrings, on the other hand, are easily recognized. Teeth of worn chainrings look like saw teeth (or top shark fin), instead of being symmetric.

Worn chainrings
UP: new chainring, DOWN: worn chainring with worn teeth.

While worn rear sprockets tend to skip, worn front chainrings don’t, they in fact hold the chain a little too well – not releasing it at the bottom part of the chainring, pulling it up a bit. Effect known as “chain suck”.

3. When to replace a chain?

Once the chain elongation reaches 0.5% of the nominal length, it is time to replace the chain. There are special chain wear measuring tools, but a simple ruler will also suffice. When measuring for wear, chain should be pulled tight and straight. Whether on the bicycle, or taken off.

Replacing the chain in time, allows rear sprockets to last from 2 to 4 chain replacements, without getting worn themselves. Front chainrings, even (lighter, but softer) aluminium ones, can last from 20 to 40 or more chain replacements.

For detailed explanation of chain wear and it’s measuring methods, as well as the consequences of irregular replacement, look at this post: When to replace the chain on a bicycle.

4. Cleaning a bicycle chain

Because bicycle doesn’t take very high loads, chain wear is mostly affected by two factors: lubrication and cleanliness. Outer appearance is not important, critical part is where rollers roll over the pins. It can even be said: chain life = cleanliness + lubrication. Both are equally important.

Bicycle chain parts 1: chain link 2: inner plate 3: roller 4: pin 5: outer plate Picture 2
Bicycle chain parts
1: chain link
2: inner plate
3: roller
4: pin
5: outer plate

When dirt enters the space between the rollers and pins, it starts wearing the chain. Sanding (polishing) pastes are practically made by mixing sand and oil. That is why it is important that chain is as clean as possible (practical) before lubricating it. Following chapters will explain some common chain cleaning methods.

4.1. Jar with paint thinner

Chain is best cleaned by taking it off the bicycle, putting in a jar with some degreaser – oil paint thinner (i.e. odourless mineral spirits) is a great choice – closing the lid and then shaking it. Dirty liquid can be poured in another jar, later poured over a filter coffee filter, and used again – save the environment! 🙂

Then new degreaser is poured and the process is repeated, until the degreaser stops being dirty after vigorously shaking the chain in it. This means that (most of) the dirt between the rollers and pins was removed. If a chain appears clean on the outside, but after shaking the degreaser keeps getting dirty, it means there’s still dirt stuck between the rollers and pins – where it damages the chain.

For this cleaning method, it is best to use a so called quick connect link. Some chains come with this link (for example SRAM and KMC made chains usually do). For others a quick link can be separately bought – as long as it matches the number of speeds the chain is for. I.e. 8 speed link is needed for an 8 speed chain, 9 speed for a 9 speed chain and so on.

Bicycle chain quick connect link. Pins of the link slide into the marked groove, locking it in place
Bicycle chain quick connect link.
Pins of the link slide into the marked grooves, locking it in place

Chains for more than 8 speeds don’t have quick connecting links that can safely be re-used for numerous connecting and disconnecting of the chain! Chains for 9, 10, 11 and 12 speeds are more expensive, and need a new quick connecting link, or a new assembly pin when connecting them back after disassembling them. Chains for more than 8 speeds have thinner plates, so pins have smaller, weaker, groove to catch onto. That is why manufacturers don’t recommend re-using such quick links. They can hold after re-use, but can also disengage without a warning!

4.2. Special chain cleaning gadgets

They try to simulate method 4.1, only without the chain removal.

Chain cleaning gadget
The containter is filled with some degreaser, small wheels with brushes are turned as the chain passes through the container. Simple, quick, but not too effective.

They usually spray a lot of dirt, dirt drips from the chain, but are less effective than the “jar” method.

4.3. Rag (and a brush)

Quick method for cleaning chain on the outside is using a rag with some degreaser. This method won’t clean between the rollers and pins. In fact, it can drive the dirt deeper into the chain, although it will appear clean on the outside.

Quick and easy way to clean a chain
Fastest, simplest, cleaning method. Not the most effective though. Slowly (back)pedalling while holding a rag on a chain.

Advantage of this method is that it’s the fastest, with the least amount of dirt spread around, so those who favour time saving to chain life can use it.

Those who want to make it more messy, with questionably better effect, can use an old tooth brush with some degreaser as well and rub the chain.

4.4. Ultrasonic jewellery cleaner

The opposite of the “rag” method. The name says it all.

4.5. Cleaning the other drivetrain components

Clean chain will quickly get dirty if put over a dirty chainring, with lots of sand stuck to it. That is why, when cleaning a chain, it is also important to clean the rest of the drivetrain as well.

All the cleaning methods shown above do not exclude one another, they can complement each other. Depending on one’s preferences and priorities.

5. How to lubricate a bicycle chain

Proper way to lubricate a bicycle chain is this: one drop of lubricant on each roller, on the inside. It is important for the lubricant to flow between the rollers and pins.

Bicycle chain lubricant
Lubricating a bicycle chain

Afterwards spin pedals for about a minute, in order for the lubricant to spread evenly, between rollers and pins. Then use a cloth to wipe all the excess oil from the chain (method explained in chapter 4.3.). The outside of the chain should be (almost completely) dry – with lubricant only left between the rollers and pins.

Properly lubing a bicycle chain.
Lubing a bicycle chain. One drop of oil onto each link.

There are also special dry lubricants. Usually paraffin wax based. They require a completely clean and dry chain before applying. Advantage is they are dry, so the chain doesn’t get dirty, sticky as with wet lubricants. Disadvantage is they are less resistant to rain washout.

Some even like to remove their chain, dip it in molted paraffin wax, or grease, then let it drip, wipe excess off and reinstall. This requires a bit more time and effort.

I’ve explained how it’s done in this video (without thorough cleaning using some degreaser on the cloth, just explained the principle):

Basic bicycle service - how to do it [1038]

6. Which chain lubricant is the best?

This question will, a bit rudely, be answered with another question: which bicycle is the best? A mountain bike will “shine” in the mud, but on a paved road it will be blown away by a road bike – and vice-versa.

It all depends on one’s riding conditions, chain cleaning methods and preferences. Generally, lubes that resist rain washout well, usually attract a lot of sand and dust – and vice-versa. If using a “wet” (oil based) lubricant – the “thicker” it is, the more it will resist water washout, but attract more dirt.

Author of this text usually uses either motor oil, or chain saw bar oil, diluted in diesel fuel to achieve required “thickness” – for autumn pouring rain, I prefer thicker oil. For deep freezing temperatures, fully synthetic “winter” petrol engine oil is a decent choice.

Sewing machine oil is also a decent choice. There are numerous lubricants sold as special, bicycle chain lubrication specific. Usually (a lot) more expensive. Some even work very well.

Motorcycle chain sprays? This gets asked a lot, so it’s worth answering. Motorcycle chains spin with huge velocities. So motorcycle chain sprays often contain silicone, or some other additive to make the lubricant more sticky and “thick”. This is detrimental for cycling use, because such lube will attract a lot more dirt. No matter how fast one spins the pedals, their bicycle chain will never get to such a high velocity to just throw oil off. So I would say that most motorcycle chain spray lubricants are a bad idea for bicycle chain lubrication.

Bicycle chain lubricants in spray cans? Unlike motorcycle chain lubricants, these are generally OK. They cost a lot more compared to what I’d call the best bicycle chain lubricant, and you are more likely to spray the adjacent stuff (like brake pads, or discs – pay attention). However, as far as chain lubrication and cleanliness is concerned, they are good.

Comparison of various chain lubricants is given in the post: Comparative overview of bicycle chain lubicants:

Comparative overview of bicycle chain lubricants
Comparative overview of bicycle chain lubricants

7. When (how often) should a chain be lubricated?

The chain starts making a distinct sound when it’s not lubricated.

OK, it will literally squeak when it’s completely dry, but if there’s at least a minimal amount of lubricant, the sound will be different. How can I describe this? Very fine rattling.

After you’ve lubricated your chain, and done some riding, you will most likely notice when your chain becomes noisy.

How many miles?

It depends on the type of chain lubricant you are using, and your riding conditions. For example: if you are using a “thin” (low viscosity) chain lubricant, or a dry lubricant (wax-based), the chain will start making noises after just one 5-mile ride in heavy rain.

The opposite extreme is using a very thick lubricant (high viscosity) and riding in dry conditions. In this case you’ll have problems with a lot of dirt and sand getting stuck to the chain, but it will take many miles before it needs re-lubricatin (though it would be a good idea to clean it and use a thinner lubricant).

Generally speaking: you can lube your chain every 100 miles, or so. A bit more often if you use dry, or very thin lubricants, or ride in the rain, and a bit less often if you ride in dry conditions without much dirt, or sand.

BikeGremlin TIP
BikeGremlin TIP

New chains come greased from the factory. I couldn’t find the formula for the factory grease, but it is very long-lasting and doesn’t attract much dirt. That’s why it is not wise to clean/lube a new chain. It should be just wiped on the outside (to remove any outer grease that could attract dirt), mounted and ridden until it starts making noise – and that can take a while with the factory grease.

7 thoughts on “How to lubricate a bicycle chain?”

  1. Thanks for the post and recommendations. I would like to point out that wear of the rollers matters little to chain life because it doesn’t “add up”. It is the wear between the pins and the shoulders of the inner plates that determines chain elongation.

  2. Great thread, as are your others. A link to a low cost (they can get pricey) ultrasonic cleaner on Amazon would be nice here. There are so many available it’s difficult to determine which one to buy. What are the minimum dimensions, more-or-less, of the tray needed to clean a chain?

    • I don’t use ultrasonic cleaners. Jar with diesel works more than good enough. So can’t recommend any ultrasonic cleaners – not until I try one that works fine.
      If I were going to buy one, I’d measure the diameter of the largest rear chainring I use, just to be able to clean the cassette as well as the chain. 🙂

      If you find a model that works well and can be recommended, you could let us know – so the others can use that recommendation as well. I believe in the power of shared/combined knowledge and experience of many people.

  3. if you want to degrease anything including chains kerosene or mineral turpentine is the best there is on the market.petrol is also good but way too risky to use,kerosene and mineral turps are pretty safe to use just do it outdoors because of fumes.

  4. Hello again from the Czech Republic.
    On factory conservation lube on Shimano chains I found this older interview on BikeRumor:

    “…from one of Shimano’s main tech gurus, Nick Murdick,

    BikeRumor: What is Shimano’s official stance on the chain lube that comes stock on a shimano chain? Is it actually a lube, or a grease? And is it best to leave it on until the chain gets noisy and relube, or strip it right away and relube before riding?

    Nick: So that brings us to lubrication. I mentioned that the chain wears because of friction as the chain moves to wrap around a gear. Well, that friction is reduced if there is lube on the chain. If there is dirt mixed in, the lube makes a bigger difference in reducing friction. If there is water mixed in, the lube helps displace the water. The grease that comes on a Shimano chain is applied at the factory to the individual pieces before the chain is assembled. The grease does a better job of reducing friction than aftermarket chain lubes and it lasts longer. The main reason we use liquid chain lube, whether it is one that stays liquid or a dry lube that has a solid lubricant in a liquid carrier (like a PTFE lube) is because we need to get the lube on a part that is not accessible without disassembling the chain. So the best thing to do when installing a new chain is to leave the factory grease on, not apply any other lube, ride until it wears out and then start applying liquid chain lube. In dusty conditions you can wipe off the outside of the new chain with a rag that is wet with a gentle degreaser to keep dirt from sticking to the grease. The factory grease also keeps the chain nice and quiet. After soaking a chain in degreaser and then lubing the chain with liquid lubricant the chain gets noticeably louder.”
    So you are absolutely right in your article. 😉
    Have nice summer holydays.

    • Hi Jaroslav,

      Why, of course. Where do you think Shimano tech guys read it from?


      Joking a bit. Thank you very much for the information.
      It’s always valuable to hear expert opinions.

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