Name: Oi Prima Bike Bell
Brand: Knog US
SKU: 13413
Price: 32.99 USD
Availability: InStock

Oi Prima bike bell features our signature wrap-around bell design and our newest innovation - WAVETEK hammer technology. The whip of this new hammer design helps to create a beautiful and consistent bell tone, while being built for robust and long-lasting use. Available in two sizes to ensure the correct fit on your handlebar (see our size guide for info on how to measure your bar diameter).

Handlebar Diameter:

Large (23.8 - 31.8mm)

Small (22.2mm)

Color: Anthracite

Anthracite

Primer Grey

Quantity:

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FREE DELIVERY AVAILABLE

30 DAY RETURNS

2 YEAR WARRANTY

Our signature wrap-around design.
WAVETEK - the latest in bell technology.
Built to last with a robust spring design.
Beautiful tone that's loud but pleasant.
Available in two sizes for a perfect fit (see below).

Small Oi Prima for 22.2mm handlebars diameter.
Large Oi Prima for 23.8 - 31.8mm* handlebar diameters.

*Shims / Spacers included with all Large size bells for the perfect bar fit. Consult our size guide for more information.

Oi Prima Bell
Hex Key
Shims - Spacers for the perfect bar fit. Large size bells only.

Free shipping to Continental USA on orders over $65 and just $8 on orders under $65. We'll ship it asap, and have it delivered within 2 - 5 business days.

Need Knog delivered by December 24th? Order by Tuesday 17th December 2025.

Returns & Exchanges

We stand behind everything we make and want you to be happy. If for any reason you're not satisfied with your purchase, return it within 30-days for a full refund. We'll even pay the shipping. For more information, please see our Returns & Warranty page.

Shipping on Knog's US website is available to Continental USA customers only. If you're shopping from another location, please visit our international store.

Slim, mimimal, with Big Sound (((( ! ))))

I’ve never been comfortable with traditional bike bells—too big, bulky, sounding weak. The Oi Prima from Knog (Canadian-Australian Commonwealth brothers and sisters) offer an incredible opportunity to upgrade my cycling kit without having to wallow in the depression caused by purchasing gear from fascist, racist, totalitarian junk-lords from the usa. Knog has it right—this bell, their bar-mounted lights (I now use the 1300 Blinder), and their helmet-mount lights (I also now use their Blinder X 2300 helmet kit)—ALL of these upgrades have thoroughly met my expectations! Commonwealth brothers and sisters: amazing products, incredible ingenuity, R&D, and providing tech which cyclists require (both on trail and urban) for staying safe! Canada, Australia, New Zealand, and the EU—ALL BROTHERS AND SISTERS partnership—ANTI FASCIST!

Perfect

Love this bell. The tone is sharp and volume is loud, but not obnoxious. The form factor is small and stays out of the way on my race gravel bike, keeping the bell out of sight and out of mind until I need it. A bit pricey, but feels premium and robust. Doesn’t make a peep on chunky gravel / singletrack until I intentionally ping it with my thumb. Honestly perfect.

Well built and the right sound for hikers and other bikers to hear on the trail! Good looking piece!

Fantastic Bell

Great bell, very sleek and low profile.

Free head torch doesn’t work!

Hi, sorry to give only four stars as your bells is a superb example of innovative design and the headlamp is good. But the free gift was a dud!

1 2 3

"RE-ENGINEERED DESIGN FOR PERFORMANCE AND LONGEVITY"

Subtle, until you strike it.

Every feature is fine-tuned for clarity, durability, and effortless installation.

WAVETEK

The innovative Oi Prima WAVETEK hammer delivers a louder, longer-lasting, and more consistent chime. The subtle wavelike motion creates a crisper, clearer tone that rings at 80+ decibels.

REFINED AESTHETIC

Every detail is meticulously considered. From tapered edges - inspired by the aerodynamic intake of a jet engine - to the minimalist silhouette and intricate laser etching.

ROBUST BUILD

The hinged clamp system makes installation quicker, easier, and secure whilst the bell's spring remains hidden within and can’t be overextended for a cleaner look that is engineered for lasting strength.

BEAUTIFUL SOUND

Loud enough to cut through traffic and trail noise, but tuned to be pleasant. The improved hammer and striking surface work together to produce a crisp, clean and considerate sound.

‘It's very loud. It's very good-looking.’

Technical Specifications +-

WEIGHT	L: 28 g / 0.99 oz, S: 20 g / 0.7 oz
DIMENSIONS	L: H: 15 mm x W: 50 mm x L: 67 mm, S: H: 14 mm x W: 38 mm x L: 57 mm
FITS BAR WIDTH	L: 23.8 - 31.8 mm bars, S: 22.2mm
HAMMER TYPE	GF Nylon and TPU
AERO BAR COMPATIBLE	No