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Muc-Off Bio Grease



Long-lasting, well priced, bearing protection. Smells nice too

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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If you intend to do any reasonable bicycle maintenance at home, there comes a point when you need a high quality grease. Muc-Off's Bio Grease, developed for Team Sky, fits the bill and is eco-friendly as well. It even smells nice, which is unusual for a grease.

Muc-Off is best known for its pink cleaner but it has been expanding its range over the years and a partnership with Team Sky, famous for its fastidious attention to detail, has generated a raft of new products. The Bio Grease is, as its name suggests, biodegradable and uses a formulation derived from renewable resources.

Find your local dealer here

Buy it online here

The days of having having to carefully grease loose bearing headsets and bottom brackets are a long way behind us with most modern road bikes featuring sealed cartridge bearings. Grease is still recommended when assembling bottom brackets and headsets, so when I built up my Genesis Croix de Fer project bike, I put the Bio Grease to work.

The Bio Grease did a top notch job of protecting the bearings and provided a protective barrier from the crud that can slowly cause bearings in the lower headset and bottom bracket to grind to a halt. After several months of riding through pretty grim conditions, I opened up the headset and the grease, while no longer its original colour, was still doing a good job of protecting the bearings.

I've also been using the Bio Grease to keep my Speedplay pedals running smoothly as well, they need very regular greasing to keep in optimum condition. And it's been doing a good job there too. The Bio Grease also works a treat on gear and brake cables as well, and improved the poor rear brake performance on one recent test bike with sub optimal cable routing.

With 150g you should get plenty of use even if you have a large fleet of bikes to maintain, and at £10 it's a reasonable price considering the level of performance it offers. It's easy to apply with a large nozzle and did I mention it smells nice?


Long-lasting, well priced, bearing protection. Smells nice too test report

Make and model: Muc-Off Bio Grease

Size tested: n/a

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?

Here's what Muc-Off have to say:

FRESH out the bowels of Muc-Off Reasearch and Development comes the NEW Bio Grease! Designed specifically for bicycle use, Muc-Off Bio Grease possesses a unique formula that prevents corrosion and water ingress so your bike's components will last long into the future! Use Muc-Off Bio Grease to increase your performance, and ensure every ride will be smoother than your last.


Muc-Off Biodegradable Bicycle Grease is specifically blended for the unique 'low speed' applications found on bicycle parts where reducing friction is paramount.


This premium formulation is based on renewable resources, and has a combination of extreme pressure lubricity additives and natural 'slip' giving it unrivalled performance in its class!

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

Bio Grease also has the added benefit of being readily biodegradable and extremely resistant to water wash off, which helps prevent corrosion, reduce friction and improve the performance of moving parts.

The guys at Muc-Off are dedicated to making eco friendly products that won't harm you, your bike or the planet and Bio Grease is no exception. This new grease is fully biodegradable and free from any nasty petroleum based oils!

Rate the product for quality of construction:
Rate the product for performance:
Rate the product for durability:
Rate the product for value:

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

Keeps your bearings protected and running smooth for a long time, which is all you can ask for

Tell us what you particularly liked about the product

That it doesn't small disgusting like grease normally does, though that alone isn't a reason to buy it over other products

Tell us what you particularly disliked about the product

Nothing really to dislike

Did you enjoy using the product? Yes

Would you consider buying the product? Yes

Would you recommend the product to a friend? Yes

Anything further to say about the product in conclusion?

Sweet smelling and long-lasting biodegradable grease for your bearings

Overall rating: 9/10

About the tester

Age: 31  Height: 180  Weight: 67

I usually ride:   My best bike is:

I've been riding for: 10-20 years  I ride: Every day  I would class myself as: Expert

I regularly do the following types of riding: road racing, time trialling, cyclo cross, commuting, touring, mtb,


David worked on the tech team from 2012-2020. Previously he was editor of and before that staff writer at RCUK. He's a seasoned cyclist of all disciplines, from road to mountain biking, touring to cyclo-cross, he only wishes he had time to ride them all. He's mildly competitive, though he'll never admit it, and is a frequent road racer but is too lazy to do really well. He currently resides in the Cotswolds, and you can now find him over on his own YouTube channel David Arthur - Just Ride Bikes

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