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Knog Oi Classic Bell



An innovative design that works just fine and looks even better

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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The Knog Oi Classic is a really innovative bell that is loud enough to grab attention and sleek enough on the handlebar that it suits almost any bike. Having the ability to push back the hammer a little harder would be nice, but it still works well.

The Oi is possibly the least bike-bell-looking bell ever. At first glance, you probably wouldn't know what it was. It just looks like a thin piece of metal wrapped around the bar, a particularly nice piece of brushed finish metal in this copper version I have to say (though I'm not sure it 'embodies' my personality). It feels solid and well machined, which is always reassuring.

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Fitting it to the bike is relatively simple: open the back of the bracket and slide it over the bar, then tighten with the bolt to keep it in place. The large version fitted well on my 31.8mm bar, and for those with thinner diameter bars there is a small version or a sheath/shim that the large version can sit on. There are also two recesses within the bracket that allow for cables to sit underneath it.

Knog Oi Classic Bell.jpg

It works by way of a simple spring-mounted hammer that hits the spring-mounted metal bar, which creates the 'ding'. It works well with soft to medium pressure, but if too much pressure is applied the bell doesn't ring too well; not really a 'thunk', more slightly muted.

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The ring itself isn't as loud as some bells, but is still loud enough for most uses. Bearing in mind that I was using it in central London, one of the loudest places in the UK, I never found that people couldn't hear it. It has a pleasing ring, too, with a clear and tuneful tone.

Knog Oi Classic Bell - on bike.jpg

Overall, I'm impressed. The Oi is a simple but really effective design at a decent price. It would be good if you could hit the hammer harder, but once you get used to it it isn't too much of an issue.


An innovative design that works just fine and looks even better

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Make and model: Knog Oi Classic Bell Copper

Size tested: Large bell fits bars 23.8mm - 31.8mm

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?

A bell designed to look unlike any other, being well made and beautiful on the bar.

Knog says: 'A bell with a beautiful tone, but also a remarkable style and choice of materials that embodies a rider's personality.'

I would go along with this (mostly); it is a well made, beautiful looking and effective bell.

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

CNC Machined

Distinctive Tone

Low Profile

Fits handlebar diameter 23.8-31.8

Rate the product for quality of construction:

Really well made, good material choice, decent ring and easy to fit.

Rate the product for performance:

Performed well with a decent ring, simple to use and easy to fit. Also looks good.

Rate the product for durability:

Well made and a simple mounting system means it's likely to last for a long time.

Rate the product for value:

Good value for an innovative design.

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

Performed well, only real complaint is that you need to learn how hard to flick the hammer.

Tell us what you particularly liked about the product

The design; I usually hate the look of bike bells on a road bike, but this one's great!

Tell us what you particularly disliked about the product

Needing to learn how hard to flick the hammer.

Did you enjoy using the product? Yes

Would you consider buying the product? Yes

Would you recommend the product to a friend? Yes

Use this box to explain your score

It's a really good product that's been well designed and looks great on handlebars, the only criticism being that you have to work out your 'flick pressure'.

Overall rating: 8/10

About the tester

Age: 29  Height: 6 ft  Weight:

I usually ride: Cannondale Supersix Evo 6  My best bike is:

I've been riding for: 5-10 years  I ride: Every day  I would class myself as: Expert

I regularly do the following types of riding: commuting, club rides, sportives, general fitness riding, fixed/singlespeed, mountain biking

George is the host of the podcast and has been writing for since 2014. He has reviewed everything from a saddle with a shark fin through to a set of glasses with a HUD and everything in between. 

Although, ironically, spending more time writing and talking about cycling than on the bike nowadays, he still manages to do a couple of decent rides every week on his ever changing number of bikes.

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