A free firmware update quietly turns Wahoo’s third-generation ELEMNT bike computers into a real-time sports-science lab — streaming core body temperature, breathing, sweat and sodium loss straight to your handlebars.
What Wahoo actually shipped
On 2 June 2026, Wahoo confirmed that a firmware update would let its third-generation ELEMNT computers pair with four next-generation biosensors and display their data live, mid-ride. CORE body-temperature support arrived first; FLOWBIO, hDrop and Tymewear followed from 16 June.
Crucially, this is a free software update, not new hardware — it lands on the ELEMNT BOLT 3, ROAM 3 and ACE and explicitly not on older units. DC Rainmaker, who tested it on hot-weather rides in Spain, called the accompanying documentation the most thorough support page he’d ever seen a brand publish on a topic.
By the numbers
Meet the four sensors
The four sensors at a glance
| CORE | FLOWBIO | hDrop | Tymewear VitalPro | |
|---|---|---|---|---|
| What it measures | Core body temp, skin temp, Heat Strain Index | Fluid & sodium loss | Real-time sweat composition & electrolyte loss | Breathing rate, tidal volume, VT1/VT2 thresholds |
| Where you wear it | Clips to HR strap / armband | Upper arm or HR chest strap (10 g) | Wearable sweat sensor | Chest / lower-rib band |
| Add-on cost (approx, home currency) | ~£221 (~R4 800) (CORE 2) | Varies by region | Varies by region | £299 (~R6 500) |
Until now each of these sensors lived in its own app, leaving riders to crunch the numbers after the ride. The update surfaces them as native data fields on the head unit, so breathing rate, core temperature, fluid loss and sodium loss sit alongside power and heart rate in real time. CORE even drives on-screen heat zones and a Heat Strain Index.
The tech already has WorldTour pedigree: BikeRadar reports that Jonas Vingegaard and Team Visma–Lease a Bike train with Tymewear, while UAE Team Emirates–XRG and EF Education–EasyPost use CORE. FLOWBIO, meanwhile, lists Red Bull’s High Performance centre in Salzburg among its adopters.
“Hydration has been one of the last parts of endurance training to rely on guesswork.”
What the reviewers make of it
Three takes from three outlets
Independent verdicts from across the cycling press — follow each link for the full review.
Hands-on in Spain — deep, with one sync gap
“The only moderate downside here is that the data doesn’t sync back to CORE’s platform automatically.”
Read the full reviewUseful for some, overkill for most
“Does every rider need body temp, sodium loss, sweat composition, and ventilatory threshold data on their bike computer? No. Absolutely not.”
Read the full reviewA statement about Wahoo’s target rider
“These are tools for athletes already spending seriously on performance data, not additions to a basic setup.”
Read the full reviewHow accurate is it — and the catch
The headline figures look strong on paper. Tymewear claims its breathing data lands within 97% of laboratory testing and flags the VT1/VT2 ventilatory thresholds used to set training zones; FLOWBIO says its sweat-loss accuracy was independently validated by a leading European heat-research university.
The independents are more cautious. Velora Cycling reports that Precision Fuel & Hydration’s own testing found FLOWBIO underestimated sweat rate by 0.44 litres per hour and overestimated sodium concentration by 413 mg per litre — even as a separate peer-reviewed study found its whole-body sweat-loss estimate statistically in line with scale measurements. As a vivid real-world data point, FLOWBIO clocked one Milan–Sanremo rider losing 5.1 g of sodium and 4.3 litres of water over the race.
There’s also a workflow wrinkle: DC Rainmaker found CORE’s readings record into the ride’s .FIT file but don’t sync back to CORE’s own app automatically. Treat all of this as informed guidance, not gospel.
Should you care?
- Free firmware update — no new head unit required for V3 owners
- Four pro-grade metrics (core temp, breathing, sweat, sodium) on one screen, live
- Native display means no juggling four separate apps mid-ride
- Genuinely useful for heat training, hydration strategy and pacing
- Backed by WorldTour adoption (Visma–Lease a Bike, UAE Team Emirates–XRG, EF Education–EasyPost)
- The sensors are pricey and sold separately (Tymewear VitalPro ~£299 (~R6 500), CORE 2 ~£221 (~R4 800))
- Only works with V3 hardware — BOLT 3, ROAM 3 and ACE
- Accuracy is still debated — independent testers flagged FLOWBIO over/under-estimating figures
- CORE data doesn’t auto-sync back to CORE’s own platform (uses .FIT)
- Realistically overkill for most everyday riders
A clever, genuinely free expansion that drags lab metrics onto the bars. The catch is the sensors’ price and the still-debated accuracy — this is for data-hungry racers, not casual riders.
The Supersapiens cautionary tale
Before you mortgage the house for sensors, a note of caution flagged by BikeRadar: Wahoo has been here before. It integrated Supersapiens real-time glucose monitoring back in 2022 — but the UCI had already banned in-competition glucose monitors in 2021, and Supersapiens ceased trading in 2024. Whether governing bodies eventually restrict live physiological data again is an open question worth watching.
From glucose to sweat: a quick history
- 2021UCI bans in-competition glucose monitors
Real-time metabolic data ruled out of racing.
- 2022Wahoo integrates Supersapiens glucose data
Live glucose comes to the ELEMNT — briefly.
- 2024Supersapiens ceases trading
The glucose-monitoring pioneer shuts down.
- 2 Jun 2026Four-sensor integration announced
CORE body-temperature support goes live first.
- 16 Jun 2026FLOWBIO, hDrop & Tymewear roll out
Sweat, sodium and breathing data hit the bars.
View data table
| US price (USD) | |
|---|---|
| ELEMNT BOLT 3 | 349.99 $ |
| ELEMNT ROAM 3 | 464.99 $ |
| ELEMNT ACE | 499.99 $ |
In Rand (approx, @ today's rate): ELEMNT BOLT 3: ~R5 800 · ELEMNT ROAM 3: ~R7 700 · ELEMNT ACE: ~R8 200
Tap to vote — see how readers lean
Rider questions, answered
Do I need to buy a new bike computer? +
No. It’s a free firmware update for the third-gen ELEMNT BOLT 3, ROAM 3 and ACE. Older ELEMNT units are not supported.
Which sensors are supported, and do they cost extra? +
CORE (core temperature), FLOWBIO and hDrop (sweat and sodium), and Tymewear VitalPro (breathing). The head-unit update is free, but each sensor is a separate purchase — Tymewear VitalPro is around £299 (~R6 500) and a CORE 2 about £221 (~R4 800), with FLOWBIO and hDrop priced by region.
When did it go live? +
CORE support began in early June 2026; FLOWBIO, hDrop and Tymewear rolled out from 16 June 2026.
Is the data accurate enough to trust mid-race? +
Manufacturers cite strong lab validation (Tymewear claims within 97% of lab testing), but independent testers such as Precision Fuel & Hydration have flagged discrepancies in FLOWBIO’s sweat-rate and sodium readings. Treat it as guidance, not gospel.
Can I use it in a sanctioned race? +
For now, yes — but there’s precedent for governing bodies restricting real-time physiological data: the UCI banned in-competition glucose monitors in 2021. Check your event’s rules.
Sources & further reading
- Wahoo’s latest update turns your bike computer into a mobile sports science lab — BikeRadar
- Wahoo’s Expanded Sensor Connectivity Goes Live: Hands-On — DC Rainmaker
- Wahoo ELEMNT Update To Display Live CORE, FLOWBIO, hDrop & Tymewear Sensor Data — Bikerumor
- Wahoo ELEMNT Expands Its Pro Ecosystem with Four New Sensors — the5krunner
- Wahoo Updates ELEMNT Computers with Native Next-Generation Sensor Integration — Bicycle Retailer
- Live sweat data lands on the bars: FLOWBIO real-time hydration comes to Wahoo’s ELEMNT V3 — Velora Cycling
Wahoo hasn’t sold you anything new — and that’s the clever part. A free firmware update turns a V3 ELEMNT into a live physiology dashboard, pulling core temperature, breathing, sweat and sodium onto one screen. For racers, heat-chasers and data-driven gravel and ultra riders, it’s a genuine edge. For everyone else it’s fascinating overkill — and the sensors, not the software, are where the real money goes. Watch the accuracy debate, and keep one eye on the rulebook.
