Your own track timer, even when you ride alone.
The Timing Cell kit is a start line and a finish line that you place wherever you want on the track. It does the timing for you, to a fraction of a second, and sends it straight into your RAD 4 BMX track and sprint sessions — without relying on GPS, without anyone on a stopwatch.
Two identical units, one job each.
One unit at the start, one at the finish — anywhere on the track, no official line needed. Each one watches its own infrared beam; as soon as you break the start beam, the signal is sent by radio to the finish unit, which calculates the time on receipt. The result is then sent via Bluetooth to the app, without your phone needing to be in range during the run.
- 📶 Long-range radio link between the two cells, no direct line of sight needed
- 🔁 Interchangeable start/finish roles, same units on both sides
- 📲 Result sent to the app via Bluetooth as soon as you're in range
Infrared beam
Long-range radio
Bluetooth Low Energy
Your progress, run after run, in your track and sprint sessions.
Unlike the virtual timing gates already in the app (calculated by GPS), the Timing Cell kit sets up a physical timer, independent of signal quality — useful when riding alone, on a specific part of the track, or to validate a time that really counts.
You place your cells
Start and finish, wherever you want on the track — a whole section, a run of corners, or the full lap.
You ride, they time
Nothing to do during the run: the signal goes by radio from one cell to the other, the time is calculated at the finish.
The time joins your session
Synced via Bluetooth into your track or sprint session, automatically compared to your previous best runs.
What we can already announce.
| Units | 2 strictly identical cells — start/finish role assigned and remembered, interchangeable |
| Detection | Infrared beam reflected off a passive reflector, no through-beam to wire on both sides |
| Cell-to-cell link | Dedicated long-range radio — reaches beyond line of sight, gets through track obstacles better than a short-range link |
| Time calculation | Entirely on the finish cell's clock, on receipt of the start signal — no drift between two clocks |
| To the app | Bluetooth Low Energy — pairing and results, RAD 4 BMX app |
| Local feedback | Buzzer and two-colour LED on each unit — status visible without getting your phone out |
| Range, battery life, waterproofing | Being validated in the field — figures announced at launch |
The prototype is riding, the launch is being prepared.
We're testing the Timing Cell kit in real conditions before putting it on sale — be among the first to know as soon as it's ready, with a launch price.
Notify me at launchTarget price ≈ €269 per pair — subject to confirmation