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

  • Maurten — the race nutrition trusted by elite athletes. Gels and drink mix engineered to be easy on the stomach.
  • Garmin 90-degree charging adapter — the small adapter that keeps your charging cable tidy at the stem. Essential for race day.
  • Garmin charging puck — the fastest and most reliable way to top up your Garmin before a session.
  • 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.
  • Garmin Varia RTL515 — radar rear light that alerts you to vehicles approaching from behind. Pairs with your Edge or Garmin watch.
  • Stryd — the footpod that brings running power to your Garmin. The single most useful running upgrade I have made.
  • Favero Assioma Pro RS2 — the power meter pedals most serious cyclists end up choosing. Accurate, easy to move between bikes.

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