Fitbit Sense 2, Fitbit Versa 4
FCC filings for Google’s upcoming Fitbit Sense 2 and Versa 4 were discovered recently. Nothing too surprising seems to be here with the physical package.
Same old awful, cheap strap and pleasant rounded square design. The rear sensor and LED array also look unchanged. The Versa 4 looks the same.
It’s highly likely these watches will launch in September along with the Google Pixel Watch which has also been effectively confirmed by leaks. Combine that with a new Apple Watch Pro/Explorer and a Samsung Watch5. and we will have some interesting stories. If that’s not enough for you we should also get a Garmin Vivoactive 5 and/or Venu Sq2.
I am hoping for a new Wahoo Watch or two (no direct intel) plus something from Polar (not very exciting from what I’ve seen) and am hoping for a new Suunto (no confirmed intel too)
Last Updated on 26 January 2026 by the5krunner
Small things I always use
- Garmin 90-degree charging adapter: Charges your Garmin from any USB-C cable. Essential when travelling. I use one.
- Body Glide: The blue anti-chafe stick swimmers and runners carry. I use it.
- Speedo earplugs: Fewer ear infections and no cold-water dizziness. I use them.
- Dryrobe Advance: My winter changing robe for open-water swims. I use one. A cheaper option is the AONYIYI changing robe.
- Maurten: Race fuel that stays easy on the stomach. I use them.
- Beet It Sport nitrate shots: Beetroot shots I take in the days before a race. I use them.
- Garmin charging puck: The quickest way to top up before a session. I use one.
- Injinji: Toe socks that stop rubbing, so you run more. I use them.
- Ultimate toe protectors: Stop black toenails on long runs. They work. I use them.
- Compressport R2 v2 calf sleeves: My calf sleeves of choice. I use them.
- Cellucor C4: My pre-workout before hard sessions.
- TPU tubes: Schwalbe Aerothan, Tubolito and Pirelli SmarTube. Light, tiny spares. I use all three.
- G8 insoles: Adjustable insoles that are good. I use them.
- Cycplus Cube: A 97g electric pump that gets a road tyre rideable in two minutes. I carry one. 5% off with code THE5KRUNNER.
Watches and sensors
- Polar H10: My daily driver for waking HRV.
- Polar Verity Sense: My backup arm-worn HR sensor.
- Nomad bedside charger: Charges my iPhone and Apple Watch overnight. I use it, and many of their bands.
- Train.Red: The best muscle oxygen sensor I’ve used.
- Tymewear: Accurate heart rate and reliable ventilatory zones. I use it to pace endurance rides over an hour.
- Garmin Forerunner 970: A pro-grade triathlon watch. I use this.
- Apple Watch Ultra 4: My daily smartwatch. No phone needed on rides.
- Garmin Fenix 9 Pro: I’ve just bought one.
On the bike
- Continental GP5000 for everyday riding, and Aero 111 on the front for special occasions.
- Helmets: Specialized S-Works Evade 3 for road riding, and Rudy Project Wing for TT-style races. I use both.
- Ravemen FR300: A front light that mounts under your Garmin or Wahoo. I use one.
- Wahoo TRACKR Radar: I use it on one bike and Varia on the other. They perform the same.
- Garmin Varia RTL515: Radar that warns you of cars from behind. I use this model.
- Wahoo ELEMNT Roam 3: The bike computer that’s easy to use. I use mine on most rides.
- Favero Assioma Pro RS2: Accurate power pedals that swap easily between bikes. I use this model.
Home and indoor training
- NPE Runn: Makes my basic treadmill smart, sending more accurate speed and distance to my watch and Zwift. I use it.
- Google Wifi: Keeps Zwift connected in my pain cave. I use it.
- Apple TV 4K: Zwift on the big screen. I use two.
- Google Nest Doorbell (wired, 2nd gen): My video doorbell, running in both Google Home and Apple Home. I use it.
Health, recovery and sleep
- FreeStyle Libre 3 Plus: Shows how my blood sugar responds to diet.
- hDrop: Measures my sweat loss in summer and indoors.
- Fourth Frontier Zone: Checks my heart under load in hard sessions.
- Oura Ring 5: My partner’s recovery tracker of choice.
- Eight Sleep: A cooling mattress cover my partner and I use nightly.
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tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. See the gear tfk uses. ID
Can you please elaborate on what you’ve seen about Polar? Kinda uncool to leave us at this situation like “hey guys i know something but i’m not gonna tell”
As you know I release info as soon as I can.
I wouldn’t get excited in this instance.
you imply that I’m cool for the rest of the time. thank you 😉
Does IT look like IT will be available for released models? Blink for yes 😉
no
I cannot understand the point of another vivoactive having the possibility of buying a Venu 2 or an Instinct 2.
Garmin could have released a better Vivosmart or a Vivosport 2 with more advanced metrics(Health and HRV related) and GPS.
garmin’s product differentiation is sometimes unfathomable
It’s nice that you’ve switched from a “I can’t see a new wahoo watch in the near fuure” of soe weeks ago to “Wahoo will release one or two watches before the end of the year”.
As someone who really want to like the Rival (that I use on a daily basis along with a Suunto 9p), I hope they’ll get better at FW updates (and finally fixe the issue I have with Stryd that…just don’t work!)
The last FW update brought an endless list of Headwinds devices to connect with the <atch (or from the App….) And none of them is useful. Still works well with the BOlt v2…
And still bad GPS giving erroneous paces (that could be fixed by Stryd…see #1: Stryd don’t work with my wahoo watch – that’s been switched and still the same….)
Curious to see what they’ll come with. Time to sell my Rival :p
there were probably semantics or mistakes in the precision of the words i used, yet HOPE is a wonderful thing.