We compared two loud bike bells: the Greallthy Full-Metal Bike Bell and the ROCKBROS 120dB Bike Bell.
What we looked at
Materials, stated volume, handlebar fit, and price.
The verdict
If you want a small, full-metal bell with a stated 80dB tone and two mounting brackets for 22.2 to 31.8mm bars, the Greallthy is the pick at £13.95. If you would rather have a retro copper alloy bell with a stated 120dB tone for £13.99, just 4p more, the ROCKBROS is the alternative.

A £13.95 brass, aluminium and stainless steel bell of about 50g, over 80dB.

A £13.99 retro copper alloy bell claiming 120dB, with 2 spacers.
Greallthy Full-Metal Bike Bell, 80dB, for 22.2-31.8mm Handlebars — Most Reviewed
Intended for: Marketed as a full-metal bike bell made from brass, aluminium alloy and stainless steel, with a stated volume above 80dB, a weight of about 50g, a 1.18 inch diameter, two aluminium mounting brackets for handlebars from 22.2 to 31.8mm, and 7 colour options. Carries 4.5 stars from 9.2K ratings on this listing.
What we liked
- Slightly cheaper than the ROCKBROS on these listings, at £13.95
- Full-metal build in brass, aluminium and stainless steel
- Very small and light at about 50g
- Large review history (9.2K ratings)
Worth knowing
- Stated 80dB, against the ROCKBROS's 120dB claim
- Slightly lower star rating than the ROCKBROS (4.5 vs 4.6)
Best for
- Buyers who want a compact full-metal bell
- Anyone who wants a choice of colours
- Those who want the most-reviewed option
Not ideal for
- Buyers who want the loudest stated volume
- Anyone who wants a retro styling
ROCKBROS Bike Bell 120dB Retro Copper Alloy Horn — Loudest Claim
Intended for: Marketed as a retro copper alloy bike bell with a stated 120dB tone, a push-down action, a water-resistant build, and two spacers to fit handlebars from 22 to 31.8mm on mountain, road and city bikes; the listing warns it suits round bars only, not aero or flat-profile integrated bars. Carries 4.6 stars from 1.4K ratings on this listing.
What we liked
- Stated 120dB tone on the listing
- Retro copper alloy design
- Push-down action described as labour-saving
- Slightly higher star rating than the Greallthy (4.6 vs 4.5)
Worth knowing
- Costs £0.04 more than the Greallthy on these listings
- Round handlebars only, per the listing
Best for
- Buyers who want the loudest stated bell
- Anyone who likes a retro look
- Those with round handlebars
Not ideal for
- Buyers with aero or integrated handlebars
- Anyone who wants the larger review base



