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Sena 30K vs LEXIN B4FM

The network, or the figures?

One of these is built for a group that keeps splitting up. The other tells you when it will be ready to ride.

Sena 30K mesh intercom unit and helmet clamp

Sena 30K

Wins 2 of 6

Check price

≈ $315 / £184 / €199

LEXIN B4FM intercom unit with helmet mount

LEXIN B4FM

Wins 4 of 6

Check price

≈ £64 / €74

Line by line

Compared on 30K B4FM
Riders supported Up to 24 in a private group mesh; Open Mesh stated as near-unlimited Up to 10
Stated range 8 km on mesh with at least six connected; 2.0 km on Bluetooth intercom 2000 m
Battery capacity Not published 800 mAh
Talk time Not published 15 hours, with 350 hours standby
Charge time Not published 3 hours to full
Protection rating Not published IP67

A tick means one listing published something the other did not, or published a better figure. It does not mean the product is better, and the column is not a score out of anything: a maker who says less loses lines here without losing a comparison. The two verdicts below are where the page is settled.

Which one, for whom

Buy the Sena 30K

The one for a group. Mesh re-routes around a rider who stops for fuel, where a paired chain simply breaks — and on six riders that is the entire point.

Buy the LEXIN B4FM

The one that publishes its numbers. Seven figures including the charge time, which is what decides whether the unit is ready on a Saturday morning, and which nothing else here gives.

What riders ask about these two

Why does mesh cost more?

It is a different radio arrangement: instead of a chain of paired links it forms a network that re-routes. On two riders it buys nothing. On a group it is the reason the category exists.

Is 8 km realistic?

The maker attaches the condition — at least six people connected — which says the figure describes a chain of units relaying rather than one unit reaching that far. A published condition is part of a published figure.

The full reviews

  • Sena 30K

    Mesh intercom · up to 24 in a group mesh · 8 km with six riders · 2.0 km Bluetooth

    A mesh intercom publishing two mesh modes, a private group of up to 24, a range extendable to 8 km when at least six people are connected, and 2.0 km over Bluetooth intercom.

    Best for: Riding in a group large enough that a paired chain of two-way links stops working.

    ≈ $315 / £184 / €199

  • LEXIN B4FM

    Up to 10 riders · 2000 m · DSP and CVC noise reduction · 800 mAh, 15 h talk · IP67

    An intercom published for up to 10 riders at 2000 m, using DSP and CVC noise reduction the maker states cuts wind and engine noise by over 90%, with an 800 mAh battery giving 15 hours.

    Best for: A group of riders who want published numbers rather than published adjectives.

    ≈ £64 / €74

Nothing written into the text below is a current price. Where an amount appears in a sentence, it is the reading taken on the day that sentence was written; what a shop is asking at this moment loads beside the product itself, and that is the figure to go by.