Pedro's Bye Grease Degreaser is a pump spray formula reckoned to dissolve grease and oil immediately without doing anything nasty to bike, operator or environment. Getting the best from it is more involved than the blurb would imply, though.
Other than describing it as biodegradable and environmentally friendly, Pedro's is tight-lipped about the clear solution's origins. It's not alone in that respect, and in these cases I make a concerted effort to use them away from plants, pets, children, waterways and, to a lesser extent, skin.
Unlike solvent-based products, which can sneak inside hubs, dissolving welcome grease, or do nasty things to seals and other rubberised components, when using Bye Grease I've been happy enough to blast away with wheels, chains and cassettes in situ.
Comparing it with solvent types, Bye Grease's ability to 'dissolve on contact' is slightly pedestrian. In practice, it also appreciates agitating with a stiff brush after 20 seconds' marinating, followed by a spray with a garden hose (that's as high as I'd go pressure-wise) or use a warm bucket of water and a clean brush.
As part of a general weekly bike clean, I've tended to fire a few shots directly at grimy cassettes, rings and so on, and then baste the residual into chain, derailleur cages and jockey wheels.
Otherwise, it's most efficiently delivered to badly sullied chains (especially those dressed in stodgy, petrochemical wet lubes) via a chain bath. Even then, it took four attempts to dismiss Rock n Roll Absolute Dry from my Univega's chain and cassette. Admittedly, this is a very tenacious blend, but Green Oil's degreaser jelly and Fenwick's FS-1 will shift it (and anything else!) by the third, moderate helping.
More basic mineral oil/ISO blends and 5w/40 synthetic motor oils, PTFE based greases, home-brewed corrosion-inhibitors and gripper pastes have relented by the second helping.
Exchanging the head for one with an in-built agitator produced a much richer mix, which worked, on average, 30 per cent faster.
Much like other concentrates, I suspected it would form the basis of a bike wash. Decanting 15% into a 750ml bottle and topping up with warm water confirmed this. Leaving it for 30 seconds or so to soften organic and petrochemical spatter before introducing a big soft brush or car sponge, reaped reasonable results, about middle of the road in the speed stakes.
It's not overly potent, and there's been no hint of streaking or discolouration of gloss finishes, though I have given matt colours a quick shot of specialist protectant.
Ultimately, Bye Grease is worth considering if you need a versatile, kind and reasonably effective utility cleaner for bikes with delicate finishes, but there are faster acting and similarly kind formulas for breezing through stocky ceramic greases, chain lubes and so on.
Quite good for degreasing delicate surfaces, but not the fastest-acting formula
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road.cc test report
Make and model: Pedro's Bye Grease Degreaser
Size tested: 500ml
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?
Pedro's says: "Say goodbye to grease and grit, this new degreaser is fast, efficient and friendly. It dissolves grease and oil immediately, wait for a few minutes and it will also dissolve dried and sunburned grit which is otherwise really hard to get rid of.
Simply apply on metal parts, scrub and rinse with water. It also works beautifully with the Chain Pig chain cleaner.
"Bye Grease is completely biodegradable and has negligible environmental impact."
My thoughts: "More effective than some but requires good technique and has less bite than Green Oil degreaser concentrate, or FS1, especially when it comes to really ground in cocktails of lube, dirt etc."
Tell us some more about the technical aspects of the product?
Pedro's gives very little away, describing it as "completely biodegradable and has negligible environmental impact."
Quite versatile and a good option if you are de-gunking delicate surfaces, but required more rider input than some before stiffer chain lubes and ground-in grot would lift.
Less wastage than some, but technique crucial to getting the best from it.
Quite pleasant to use, not harsh on the skin or surfaces.
Tell us how the product performed overall when used for its designed purpose
Overall, a useful and seemingly gentle formula. Easily tuned to different strengths and, mixed correctly, doubles as quite a good bike wash. However, there are plenty of concentrates that do a more convincing job of cleaning stubborn grime from drivetrain/components.
Tell us what you particularly liked about the product
Can be tuned and tweaked to perform various jobs, including bike wash.
Tell us what you particularly disliked about the product
Lacks the bite I would expect.
Did you enjoy using the product? Yes
Would you consider buying the product? On balance, not in its present guise.
Would you recommend the product to a friend? Not over something like Fenwick's FS-1.
Use this box to explain your score
Quite a versatile cleaner, but there are faster-acting formulas if you are looking for a drivetrain-specific degreaser/cleaner.
About the tester
I usually ride: Rough stuff tourer based around 4130 Univega mountain bike frameset My best bike is: 1955 Holdsworth Road Path and several others including cross & traditional road
I've been riding for: Over 20 years I ride: Most days I would class myself as: Experienced
I regularly do the following types of riding: cyclo-cross, commuting, touring, fixed/singlespeed, mountain biking
Shaun Audane is a freelance writer/product tester with over twenty-eight years riding experience, the last twelve (120,000 miles) spent putting bikes and kit through their paces for a variety of publications. Previous generations of his family worked at manufacturing's sharp end, thus Shaun can weld, has a sound understanding of frame building practice and a preference for steel or titanium framesets.
Citing Richard Ballantine and an Au pair as his earliest cycling influences, he is presently writing a cycling book with particular focus upon women, families and disabled audiences (Having been a registered care manager and coached children at Herne Hill Velodrome in earlier careers)