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B'Twin 300 Chain/Derailleur Bike Oil



A cheap, no-frills lubricant that could replace your more expensive one, but may need more applications

At every product is thoroughly tested for as long as it takes to get a proper insight into how well it works. Our reviewers are experienced cyclists that we trust to be objective. While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. We don't intentionally try to break anything (except locks) but we do try to look for weak points in any design. The overall score is not just an average of the other scores: it reflects both a product's function and value – with value determined by how a product compares with items of similar spec, quality, and price.

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B'Twin 300 Lubricant is a cheaper option to many lubes out there. It's easily applied and will keep your chain and derailleur running smoothly.

Made in France with the only ingredient seeming to be 'lubricant', it's a no-frills lube. To use, clean your chain as you would normally, cut the top off the nozzle – which is long and thin, making application really easy – and apply to your chain links. Its viscosity is just about right, but have an old rag ready to catch the excess as it can come out a little fast until you get used to the flow.

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The bottle gives no indication as to how long to leave it before a ride, but you can just use common sense. Use it at the end of a ride and it'll have plenty of time to penetrate before you go out again. When I left it overnight and used my bike the next day, everything worked smoothly. Gears shifted with ease and felt the same as when I had used more expensive lubes. I rode my bike in wet, dry and dusty conditions, and the lube did a good job of minimising dirt being attracted to the chain.

After a week or so of riding, the chain had started to get gritty and needed a good clean. Weekly applications are probably needed to ensure best performance. I rode in excess of 150 miles in a week in mixed weather, but it's possible you could go longer between applications if you cycle in dry conditions and for fewer miles.

For the price of £2.49 there isn't really a bad thing to say about this lubricant. You probably won't go through it twice as fast as anything twice the price, even with weekly applications (more so during wet/winter weather), making it an excellent choice.


A cheap, no-frills lubricant that could replace your more expensive one, but may need more applications

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Make and model: B'Twin 300 Chain/Derailleur Bike Oil

Size tested: 135ml

Rate the product for durability:

Would you consider buying the product? Yes

Would you recommend the product to a friend? Yes

Rate the product for quality of construction:

Tell us some more about the technical aspects of the product?


It's pretty cheap and does a great job.
Rate the product for performance:
A good lube, but will need more applications over winter.

Tell us what you particularly liked about the product

The application nozzle was easy to use.

Did you enjoy using the product? Yes

Tell us what the product is for, and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

The product is for lubing drivetrains and is aimed at all bike users. B'twin say "precisely lubricating all types of chains and adjustment screws. Oil can with thin nozzle for added precision". The lube is really easy to apply and can be used on all bikes.

Tell us what you particularly disliked about the product


Tell us how the product performed overall when used for its designed purpose

The lubricant kept my chain running smoothly mile after mile.

Rate the product for value:

Overall rating: 8/10

About the tester

Age: 34  Height: 158cms  Weight: 61kg

I usually ride: Giant Defy  My best bike is:

I've been riding for: Under 5 years  I ride: A few times a week  I would class myself as: Experienced

I regularly do the following types of riding: road racing, commuting, sportives, general fitness riding, mountain biking


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