Sena BiKom 20 Cycling Communication System - Lightweight 20g Unit

Our review of the Sena BiKom 20 finds a specialty cycling comms unit aimed at riders who prioritize minimal weight and reliable group communication. The single biggest reason to buy is its featherlight 20 g construction combined with a usable 0.5 mile range, which keeps helmets and setups uncluttered while letting riders stay in touch on trails and fast group rides. This review focuses on real-world utility: clear voice transmission in noisy conditions, simple firmware updates over the air, and a battery life that supports most multi-hour outings.

Key Features

• 0.5 mile range: Enables riders to maintain group voice contact across typical trail gaps and stretched pelotons without frequent reconnection.
• Up to 7 hours talk time: Delivers enough on-bike communication for long rides or several shorter sessions between charges.
• Advanced Noise Control: Helps preserve intelligible voice in wind and trail noise so instructions and warnings are understood.
• Talk to unlimited users: Multiple-channel support across nine channels lets large groups communicate without complex pairing limits.
• 20 grams weight: Ultra-light construction reduces helmet bulk and minimizes impact on bike setup for performance-focused riders.
• Over-The-Air updates: Keeps firmware current without connecting to a computer, simplifying maintenance and new features.

Who It's For

The BiKom 20 is best for mountain bikers and group road riders who want an unobtrusive, lightweight comms option that preserves helmet balance and reduces drag. Riders who value range and safety during fast descents or technical sections will appreciate the clear voice priority and channel flexibility.

It may be less suitable for users who need headset-style audio playback or exceptionally long battery endurance beyond the stated 7 hours, or for riders expecting flawless connectivity in every environment, as some customers report mixed experiences with connectivity and sound under certain conditions.

Pros & Cons

Pros

• Extremely light 20 g design makes it easy to integrate with helmets and minimal kit setups.
• Effective 0.5 mile communication range gives practical coverage for most group rides and trail scenarios.
• Advanced Noise Control improves speech clarity in wind and ambient trail noise for safer communication.
• OTA firmware updates simplify keeping the unit current without extra hardware.

Cons

• Some users report mixed sound quality and occasional connection hiccups, so performance can vary by environment and setup.
• Battery life is good but may not satisfy riders needing longer than 7 hours of continuous talk time.

Specifications

Brand	Sena
Model	BiKom 20
Weight	20 grams
Communication range	0.5 mile
Talk time	Up to 7 hours
Channels	9 channels, talk to unlimited users
Updates	Over-The-Air firmware updates

Our Verdict

The Sena BiKom 20 is a focused tool for riders who want light weight and dependable short-range group voice communication. It offers strong safety and range benefits for MTB and group road use, and OTA updates keep it current. Those seeking perfect connectivity in all conditions or very long continuous talk time should weigh the mixed user reports on sound and battery against the clear advantage of its 20 g design.

Frequently Asked Questions

How long does the battery last on a single charge?
Expect up to 7 hours of effective talk time under normal use, which covers most multi-hour rides.

Can it handle large group communication?
Yes, it supports communication over nine channels and can reach many users, making it suitable for large group rides.

Is firmware easy to update?
Yes, firmware is delivered Over-The-Air so updates can be installed without a computer.