11

In the past, I personally have only used WD-40.

However, I have occasionally had my bicycle looked over at the locally run, free service sessions and most of the mechanics there use a hand applied type of greasy gel (I forget the name).

Questions:

  1. Is WD-40 suitable for bicycle chains?
  2. Would alternatives provide better chain longevity?
  3. When shopping around for lubricant, what are the most important things to look for?
  4. What do you use and why?

    (optional added extra) Any tips for reducing chain wear?

  • (Pretty sure this question has been asked/answered several times already.) – Daniel R Hicks Feb 19 '14 at 18:32
  • @DanielRHicks I couldn't seem to find any. NOTE: I will keep this open for a few days to give people time to answer. – Xareyo Feb 20 '14 at 10:35
  • Did you look to the right of this question? – Daniel R Hicks Feb 20 '14 at 12:20
  • Of course and none are related. Feel free to link. – Xareyo Feb 20 '14 at 13:27
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    Here's a question that discusses WD-40, both the original and their newish line of bike specific lubes. bicycles.stackexchange.com/questions/20378/… – jimchristie Feb 20 '14 at 20:32
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This question leads to one of the great religious debates of the bicycle culture. Ask ten mechanics which chain lube is best, you'll get ten different answers. The honest answer is "it depends on your maintenance habits and the weather and your preferences, so you should try some different things until you develop an opinion of your own." That's tough to do without understanding what to look for.

The main species of chain lubricants you will see:

  • Oils of various viscosities. Often sold as 'wet weather' lube. Finish Line wet is an example.
  • Teflon in an evaporating solvent. Often sold as 'dry weather' lube. Finish Line dry is an example.
  • Wax in an evaporating solvent. White Lightning Clean Ride is an example.

Oil is a fine lubricant. It sticks on your chain fairly tenaciously in bad weather, so requires less frequent application. On the other hand, road dirt can accumulate quickly and turn into a nasty black paste, especially if overapplied. Wipe extra lube off the exterior of your chain after application!

The Teflon and Wax style lubricants have a lubricating substance in a solvent. The solvent lets the stuff flow, distributing the lubrication to the inner crevices of your chain, and then evaporates, leaving the lubrication where it needs to be. Then, like with oil, you wipe off the exterior of the chain. These chain lubes tend to leave your chain less messy, but can wash out more easily in rainy-day riding.

Take those considerations into account and pick whichever seems most suited to your situation.

As other answers have mentioned:

  • WD-40 does not make a great chain lube, what lubrication it leaves after evaporating is too thin.

  • Do clean your chain, externally with a rag at the very least, before re-lubing. If you do a thorough clean with solvent or degreaser & water, make sure your chain is completely dry before reapplying.

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    Thank you for the detailed answer, it's a good summary which seems to cover all of the bases. – Xareyo Feb 24 '14 at 11:07
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    For more information, you can check out Sheldon Brown's article on chain lubrication. Even on that page there seem to be some debate (see John Allen's note about Phil Wood oil) – Bibz Jul 24 '15 at 14:42
6

Go to a bike store and buy purpose-made chain oil. It will generally come in 2-3 grades from "dry" to "wet". "Dry" you'd use in dry, dusty conditions. "Wet" you'd (obviously) use in conditions where it's frequently wet. You can read the blurb on each bottle to see what sounds best for you.

At the very least, wipe the chain with a rag before oiling. Ideally, use some sort of "chain washer" (ask at the bike store) to clean the chain before oiling.

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  • I live in a fairly mild to wet region, so on first assumptions I would have to go down the wet route. Like you said however it maybe worth checking out some shops to see what each say. – Xareyo Feb 20 '14 at 10:53
  • @Xareyo - The thing to beware of with "wet" oil is that it is stickier and collects dust/grit more rapidly than "dry" oil. Thus the chain needs to be cleaned and reoiled more frequently. – Daniel R Hicks Feb 20 '14 at 12:22
3

WD-40 is the wrong stuff since it pretty much evaporates off. Motor oil is also not ideal. 3-in-1 oil is also not ideal since it gums up. Using a purpose bicycle chain lube will improve longevity. The particular choice of lube is a bit of a religious choice, but they are marketed with specific conditions quoted. You can find one at your bike shop on which riding conditions you do, and then use it.

This link to Sheldon Brown is a good read on chain maintenance and when to replace your chain. For cleaning your chain, you can use something like the Park Tool CG-2.2 - its essentially a case, which you put in something like citrus degreaser and close it over your chain. then you spin the chain, and it brushes the chain and washes it in the degreaser.

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  • Thanks for the article link, I found the section on measuring chain wear very interesting. I've seen people measure them before and most have been reluctant to share what they are looking for. – Xareyo Feb 20 '14 at 11:00
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    The practical aspect is that chain wear gauges like the cheap park one area a lot easier than his system though, even if they make you replace your chain earlier. – Batman Feb 20 '14 at 12:15
  • Yeah, in practice using a ruler is so awkward that few are apt to do it very often, or remember how to do it from one measurement to the next. And the gauge is cheap and easy to use -- you can easily do it daily if you want (which would be a good idea for me, since I always forget where the thing is). – Daniel R Hicks Feb 20 '14 at 12:27
2

Stop using WD-40. It's not a lube but a degreaser.

The most important thing to consider when buying a chain lube is your riding conditions. There are dry and wet chain lubes. Choose accordingly.

Any tips for reducing chain wear?

Make sure the chain is relativelly clean and dry before relubing. Relubing a chain full which is of dust and soil will make them act like grinding material which will wear your chain down.

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    My reference to WD-40 assumes the generic and classic WD-40 and not the bike specific ("WD-40® BIKE") dry lube. – cherouvim Feb 19 '14 at 16:43
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    what about using WD-40 to clean the chain before lubing it? – Michael Feb 19 '14 at 20:08
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    @Michael: I have done that many times. Cleans the chain well. Not sure it its the advised thing to do though. – mattnz Feb 19 '14 at 20:14
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    @Michael - Yeah, WD-40 is not a terrible choice for cleaning the chain, and is a pretty decent choice for cleaning gunked-up derailers and clusters. When I use it what I like to do is slide a section of newspaper up behind the chain and derailer when spraying, to keep the stuff off the tire. Just be sure to wipe off as much as possible before oiling. Then oil, wipe, and oil again, since the WD-40 dilutes the oil a bit. – Daniel R Hicks Feb 20 '14 at 2:04
1

I use industrial chain lube spray from the hardware store, because it is several times cheaper than dedicated bike lubes and flows well into the chain links.

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0

Is WD-40 suitable for bicycle chains?

No. WD-40 is more solvent than lubricant. It means "water displacement". For that it might work. For bicycle chains it is not much better than any other volatile solvent such as water (yes, if you have ridden in rain you have noticed a wet chain doesn't squeak so water is lubricating it -- when the rain stops, the squeaking starts).

Would alternatives provide better chain longevity?

Yes. Use a thixotropic motorcycle chain lubricant in a spray can.

The spray can is agitated before application. The thixotropy of the lubricant makes it thin after agitation. Thus, when sprayed, the thin lubricant penetrates to the innards of the chain easily. When left to settle, it becomes thick, staying inside the chain. When you start to ride, the thixotropy makes it thin again, not resisting motion as much. When left to settle, it becomes thick again, staying inside the chain and preventing drops of lubricant on the floor.

Also remember to only lubricate a chain that squeaks and remove all external dirt you can easily remove from the chain. Don't lubricate a dirty chain! Don't also lubricate a chain that already has oil. If the chain has (clean) oil inside, it has also (dirty) oil outside. Cleaning an oily chain is practically impossible without first removing the oil by a solvent. Oiling an already oily and thus dirty chain carries the dirt inside the chain, destroying the chain in no time.

So, I repeat: only oil a chain that squeaks! Do not do any "preventive maintenance", or early oiling.

When shopping around for lubricant, what are the most important things to look for?

Thixotropy. Unfortunately, most marketers do not mention this property in the label of the product. However, if it is marketed as a motorcycle lubricant and is in a spray can, and if it is a wet lubricant as opposed to a dry lubricant, it very well could be thixotropic. You can test the thixotropy of a lubricant by agitating a spray can and spraying it to a transparent container. Then move the lubricant in the container by tilting. The lubricant should flow easily. Then leave the lubricant in the container to settle. Tilt the container after it has settled for a day. It should be very thick (but of course if you tilt it actively many times, it becomes gradually thin again due to thixotropy).

What do you use and why?

A thixotropic motorcycle chain lubricant, due to its thixotropy properties that mean it easily penetrates a chain after shaking the spray can, and when left to settle, it stays inside the chain. When starting to ride, it becomes thin again not resisting forwards motion of the bike, and when parking the bike, it becomes thick again, not dropping on the floor.

Avoid the so-called dry lubricants. They require constant reapplication even if riding in completely dry conditions. My wet chain lubricant lasts for hundreds of kilometers if not thousand.

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  • Wet lubes in dry dusty weather are pure dust magnets for the chain. – Vladimir F Aug 10 at 17:27
  • Also, I wonder whether there is any chain lube that actually isn't thixotropic. Most oils and greases certainly should be. – Vladimir F 2 days ago
  • Motor oil is not thixotropic. Yet, it is an oil. However, it is not marketed usually as a chain lubricant. – juhist yesterday
  • You are right, motor oils are rheopectic and dilatant when cold. – Vladimir F yesterday
0

I love the idea of waxes, but they wear off of the load bearing surfaces rapidly, and are hard to re-apply as frequently as I would like to keep my chain sufficiently protected. I have used Triflow on my chains for years. It does a great job of slowing wear. It accumulates gunk fast but works fine as a chain lube. It sticks to my chains and keeps them quiet and moving smoothly between cleanings. It doesn't wash off in wet conditions. I've tried gazillions of different lubes over the years, but I always come back to Triflow.

That Being said, try a lube you've never used before on a freshly cleaned chain and take note of how it performs and how well you feel it works. Maybe Triflow isnt the lube for you, but experimentation is always a good thing.

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-1

This is hugely unpopular at this site and will surely be downvoted into oblivion, but many people report success when using WD-40, the classical one, as the only chain lube and a degreaser at the same time. The most public of them likely being Simon Richardson, a former professional racer (also a cyclocross racer) and now a presenter of GCN - the Global Cycling Network. For example, but not only, here

Also, while WD does really stand for "water displacement" it is actually a lubricant at the same time. The vendor's page says:

Myth: WD-40® Multi-Use Product is not really a lubricant.

Fact: While the “W-D” in WD-40® stands for Water Displacement, WD-40® Multi-Use Product is a unique, special blend of lubricants. The product’s formulation also contains anti-corrosion agents and ingredients for penetration, water displacement and soil removal.

I used to use it too, but now I mostly use other lubes, ceramic ones or other dry ones. My last encounter with a wet one (green Finish Line) was very unpleasant because although it was somewhat wet outside, it did not straight-out rain and it left my chain in a horrible mess, noisy in an unusual way, and was very hard to get off even using a chain washing tool. Think twice before using when it is not straight-out raining. Perhaps a small bottle of a thin oil with you in case of a rainshower would be better.

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