News Polar Insider

Polar Grit X – gets notable new Firmware

1 July 2020
the5krunner

Polar Grit X – new Firmware

More: Polar Grit X2 PRO Review

As of today, Polar Grit X owners should see some new watch firmware which also builds on a minor improvement made to Polar FLOW yesterday. Let’s start with the easy one

Polar Grit X Review Specifications

Polar FLOW Navigation

  Polar.com

Route navigation is ‘improved’ for all of Polar’s navigation-enabled devices which means the Polar Grit X, Polar V800, Polar Vantage V and the Polar V650. The change is on FLOW itself and the improvement is to the accuracy of created routes.

Polar Grit X – Firmware v1.2.5

  Polar.com

Polar lists the following improvements which are bug fixes. I’ve asked for clarification from Polar on several points relating to the GNSS (GPS) changes. The Grit X is acceptably accurate but some improvement would always be welcomed.

  • Fueling reminder sound and vibration modified to make reminders easier to notice
  • Back to start and route guidance displays functional at the same time
  • Crash at the end of a training session when the number of hills detected during the session is over 60, fixed
  • New Sony GNSS firmware
  • Stability improvements

Polar Grit X A Detailed Look

Polar Grit X Review – covering Grit X Pro, Grit X Pro Titan

 

Polar Grit X Accuracy

The following post will remain supporter-only content, as will most new ACCURACY posts.

https://the5krunner.com/2020/05/01/polar-grit-x-accuracy/

Last Updated on 22 January 2026 by the5krunner

My favourite kit and nutrition

  • Injinji – Runners protect your toes. Avoid discomfort and minor injury. Run more. Run faster. I use them.
  • Garmin 90-degree charging adapter — The small adapter that keeps your charging cables tidy. Essential for race day. I use one.
  • Garmin charging puck — the fastest and most reliable way to top up your Garmin before a session. I use one.
  • Ravemen FR300 — Front light that mounts directly under your Garmin or Wahoo head unit. Keeps your bars clean and your beam pointed where it matters. I use one.
  • Body Glide – The blue anti-chafe stick that all swimmers and many runners use. I use it.
  • Maurten — The race nutrition trusted by elite athletes. Gels and drink mixes engineered to be easy on the stomach. I use them.
  • Garmin Varia RTL515 — A radar rear light that alerts you to vehicles approaching from behind. Pairs with your Edge or Garmin watch. I use this model.
  • Favero Assioma Pro RS2 — The power-meter pedals most serious cyclists choose. Accurate, easy to move between bikes. I use this model.
  • Garmin Forerunner 970 — A serious choice for a pro-grade triathlon watch. I use this.
  • Polar H10 — My daily driver for accurate, waking HRV readings.
  • Wahoo ELEMNT Roam 3 — The bike computer that has the feature Garmin lacks: usability. I use mine on most rides.

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