Twenty grams. That's how much the entire communication system weighs. The Sena BiKom 20 is built around a simple idea: make the unit so light you forget it's on your helmet. Most Bluetooth intercoms hover around 50-70 grams. Sena dropped it to 20 grams by stripping everything down to the essentials, no bulky jog dial, no oversized battery pack, no complex controls.
Specs and Build Quality
The BiKom 20 is Sena's lightweight multi-sport communication system. It's designed for cyclists, trail runners, skiers, and anyone who wants voice comms without a heavy headset. But it works on motorcycle helmets too, especially for riders who want the lightest possible setup.
Key specs:
- Weight: 20 grams
- Communication range: Up to 0.5 miles in optimal conditions
- Talk time: Up to 7 hours
- Channels: 6 open communication channels
- Users per channel: Virtually unlimited
- Noise control: Advanced Noise Control for wind and environment
- Firmware: Over-the-air updates via Sena app
- Microphone: Integrated boom-style
The design is minimal. There's no large housing like the SMH10 or 5S. The BiKom 20 is a small pod that adheres to the side of the helmet with an adhesive mount. The controls are basic: power, channel, volume. This is a comms-first device, not built for music streaming or phone calls as a primary function.
Audio and Microphone Performance
The BiKom 20 uses Sena's Advanced Noise Control to filter wind and background noise. For a 20-gram unit, the mic performs well. Riders at the other end report clear voice pickup up to about 40 mph. Beyond that, wind noise starts creeping in. The noise control does a decent job filtering out wind at moderate speeds, which is impressive for such a small device.
The speakers are smaller than those on standard motorcycle intercoms, expected given the weight target. Audio quality is adequate for voice comms but not for music. If you want HD stereo music streaming, this is not the right device. If you need to communicate with riding buddies on the trail or road, it gets the job done. The tradeoff for the weight savings is clear: voice clarity at the expense of music quality.
The 6 open channels let you switch between different groups or share a channel with unlimited users. This is useful for group events, training rides, or multi-sport outings where people come and go throughout the day.
What Amazon Reviewers Are Saying
With 360 ratings at 4.3 stars, the BiKom 20 has a decent sample size. The most common praise is the weight. Reviewers consistently mention they forget they're wearing it, especially on longer rides.
Positive themes:
- The 20-gram weight is genuinely noticeable versus standard intercoms. Many users say it's the first thing they notice even on the first ride.
- Easy to pair and use across multiple devices. The Sena app makes the setup process straightforward.
- Loud enough for trail and road communication. Even at moderate speeds, the audio remains clear for voice conversations.
- Battery life matches the 7-hour claim under normal use. For a device this small, the battery performance is impressive. Several reviewers report getting through full day rides on a single charge.
Negative themes:
- Music audio quality is poor. This is not a music headset and reviewers confirm that.
- Adhesive mount can weaken over time in hot weather. Some users recommend carrying the spare adhesive pad for long summer trips.
- No Bluetooth multiplexing. Can't pair phone, GPS, and intercom simultaneously. This limits the device for riders who need navigation audio alongside comms.
- Range drops significantly with obstacles or hills. In open terrain it works fine, but in wooded or mountainous areas the connection can break up.
Who Is This Intercom For?
The BiKom 20 fills a specific niche. It's for multi-sport riders who want bare-minimum voice comms without the bulky weight of a motorcycle intercom. Cyclists, ebike commuters, trail runners, and skiers are the target audience. It also works as a secondary lightweight option for motorcyclists who already run a music-focused headset and just want intercom functionality for regular group rides. For anyone who values minimal weight above all other features, this is the only option at this size.
Less ideal for: riders who need music streaming quality, anyone who wants to pair multiple Bluetooth devices at once, or riders who ride primarily on highways at 60+ mph where wind noise overwhelms the mic.
Check current pricing on Amazon and compare on the intercom comparison table. Browse our other intercom reviews on the blog for more lightweight options.
Frequently Asked Questions
How much does the BiKom 20 really weigh?
20 grams exactly. That's about the weight of four US quarters. It's the lightest communication system Sena makes and about a third the weight of most motorcycle intercoms. For comparison, a Sena 5S weighs around 55 grams and the SMH10 weighs closer to 70 grams. The difference is immediately noticeable when mounting it on a helmet.
How does it attach to a helmet?
It uses a strong adhesive mount pad with no clamping mechanism. The mount is permanent once applied but the unit itself slides on and off. Make sure to clean the helmet surface thoroughly before applying the adhesive pad for best results. The adhesive is strong enough for road use but can weaken in extreme heat over many months.
How many riders can talk at once?
Virtually unlimited on a single channel. The BiKom 20 operates on 6 open communication channels, and each channel supports unlimited users in range. This makes it ideal for group rides with changing participants or large group events where multiple people need to hear directions.
What's the range in real-world conditions?
Advertised range is 0.5 miles in optimal line-of-sight conditions. Expect 0.2 to 0.3 miles in hilly or wooded terrain. The range is adequate for keeping a group together on a trail or road ride. If you mostly ride in open areas, the full 0.5 mile range is achievable.
Does it do music or phone calls?
It can, but audio quality is not the focus. It prioritizes voice comms. Music through the BiKom 20 sounds thin compared to any Sena motorcycle intercom. For turn-by-turn directions and quick calls, it's fine.
Can I use it on a motorcycle?
Yes, the adhesive mount works on motorcycle helmet shells. The wind noise handling is decent up to about 40-50 mph. It's best suited for urban commuting and back roads rather than highway riding.