The Hornit dB140 Bike Horn (Upgraded V3) works as a high-impact urban safety tool: a loud, fast-warning option for riders dealing with traffic, distracted drivers, and headphone-wearing pedestrians.
Overview
It delivers a 140dB piercing alert plus a 121dB car-horn style tone, both designed to cut through street noise and grab attention quickly. This version adds a remote trigger, letting you fire the horn without shifting your grip, and it includes an upgraded mounting system with two bar-specific mounts for common cockpit sizes.
Key takeaways
- Two sound modes: a 140dB piercing duo tone for traffic, and a 121dB horn mode for parks and shared paths
- Remote trigger supports quick warnings while you keep both hands steady on the bars
- Upgraded mounting system includes two mounts (22–26mm with spacers, and a dedicated 31.8mm option) to simplify fit on most bars
- Compact, weatherproof build; powered by 2 AAA batteries with an advertised up-to-12-month runtime under light daily use
- Real-world feedback varies on attention-grabbing power, mounting fit, and long-term durability, so focus on correct fit and smart placement
Ear-Splitting Volume That Boosts Road Safety
Hornit markets this as “The World’s loudest cycle horn” at 140dB at the source, and I’ve found it cuts through traffic noise fast. I treat it like a safety tool for city streets where a simple bell gets ignored by drivers and headphone-wearing pedestrians.
How I use the two sound options and remote
I rely on these practical setups:
- Piercing mode: a high-pitched 140dB duo tone that grabs attention around cars, vans, and trucks.
- Horn mode: a 121dB car-horn style sound that feels better for parks and shared trails.
- Remote trigger: I keep both hands positioned and still fire the horn instantly when gaps close.
Check current pricing and availability at Amazon here!
Hornit dB140 Bike Horn, Upgraded V3 Model, World’s Loudest Bicycle Horn for Increased Rider Safety, Remote Trigger and Upgraded Mounting System Included
This image is property of Amazon.com.
Easy Installation, But Mounting Can Be Hit-or-Miss
I can install the Hornit in a couple of minutes, and the upgraded mounting setup keeps the process simple. The box includes two handlebar mounts, so I don’t have to improvise with zip ties or hunt for adapters. Fit still matters, though, and I always check my bar diameter before I commit to a position.
One mount covers 22–26mm bars and ships with four spacers for dialing in the clamp size. The second mount targets 31.8mm road bike bars, which helps on modern drop-bar setups where standard clamps often slip. I like to test-fit both mounts loosely first, then rotate the horn body to confirm thumb access without interfering with lights, GPS mounts, or brake levers.
Quick fit checks I use before tightening anything
I run through a short checklist to avoid surprises:
- Measure bar diameter and pick the correct mount (22–26mm with spacers, or dedicated 31.8mm).
- Dry-fit in two spots to avoid cable housing pressure and lever clash.
- Add or remove spacers until the clamp closes cleanly without forcing it.
- Confirm the clip grabs firmly; some riders report clips feeling too big on certain cockpits.
Check current pricing and availability at Amazon here!
Hornit dB140 Bike Horn, Upgraded V3 Model, World’s Loudest Bicycle Horn for Increased Rider Safety, Remote Trigger and Upgraded Mounting System Included
This image is property of Amazon.com.
Compact, Weatherproof Build With Solid Battery Life (Caveat)
I like how compact this horn feels on the bar. It weighs 3.6 ounces with the mount, trigger, and batteries, so it doesn’t clutter a commuter setup. The brand calls it completely weatherproof, which makes it a solid pick for rainy rides and winter grit. Power comes from 2 AAA batteries (included) and the claimed runtime reaches up to 12 months with “normal use” of about six 1-second blasts per day.
What I do in practice
I keep a few basics in mind:
- Pack spare AAAs in a bag, since some buyers report dead-on-arrival cells.
- Do a quick test blast before longer rides.
- Store extras at home like bulk batteries so I don’t get stuck.
Check current pricing and availability at Amazon here!
Hornit dB140 Bike Horn, Upgraded V3 Model, World’s Loudest Bicycle Horn for Increased Rider Safety, Remote Trigger and Upgraded Mounting System Included
This image is property of Amazon.com.
Real-World Performance: Loudness and Durability Vary
Real rides show split feedback on how this horn sounds and how long it lasts. I’ve seen riders describe it as “super loud,” yet others say it feels like a general alarm tone rather than a focused “car horn” blast. A smaller group reports it “barely gets attention” in loud city traffic or windy multi-use paths, where sound gets swallowed fast. In practice, I treat it as a close-to-mid range attention tool, then pair it with good positioning and predictable passing.
How I’d set it up for better results
A few setup choices can reduce failures and improve how the sound carries:
- Mount it where it won’t get knee strikes or constant cable rub, since repeated flex can stress the housing.
- Tighten to snug, not crushed. Over-torquing can create plastic stress that shows up later.
- Avoid direct spray zones. Persistent rain grit can work into seams and buttons over time.
- If I ride rough pavement, I add a thin rubber shim to cut vibration and lessen clamp bite.
If I want simple bike readiness items too, I’ll toss in AA batteries for spares.
Check current pricing and availability at Amazon here!
Hornit dB140 Bike Horn, Upgraded V3 Model, World’s Loudest Bicycle Horn for Increased Rider Safety, Remote Trigger and Upgraded Mounting System Included
This image is property of Amazon.com.
Bottom Line: Best for Urban Commuters Wanting a Strong Signal
I treat the Hornit dB140 V3 as a practical upgrade for dense city riding where drivers, pedestrians, and other cyclists react faster to a sharp, commanding signal than to my voice. The dual modes let me pick the right tone for the moment, and the remote trigger means I can keep a secure grip while still warning quickly. That combo can cut down on hard braking and the stress that comes with last-second surprises.
What I’d do before buying
A few quick checks help avoid the most common frustrations:
- Confirm handlebar diameter before I order: 22–26mm or 31.8mm.
- Plan the control placement so the remote sits where my thumb can hit it without shifting my hand.
- Accept that some riders report mounting-fit quirks or durability complaints, then inspect the mount after the first rides and re-tighten if needed.
For anyone who wants a loud, fast “presence” button for commuting, it’s a strong pick. If I want extra certainty for long-term hardware toughness, I’d weigh those mixed reports carefully and double-check fit first.
Check current pricing and availability at Amazon here!
Hornit dB140 Bike Horn, Upgraded V3 Model, World’s Loudest Bicycle Horn for Increased Rider Safety, Remote Trigger and Upgraded Mounting System Included
This image is property of Amazon.com.
Disclosure: As an Amazon Associate, I earn from qualifying purchases.
I’m a computer engineer, musician, cyclist, and dabbling in photography.
