Polar Grit X

Polar Grit X

"With its rugged design, power save options and detailed route planning the Grit X is designed for long distance sports enthusiasts who like going off grid."


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 2-3 Day Delivery

 Questions? Live Chat or Call 0333 335 5026

 2 Year Warranty


With its rugged design, power save options and detailed route planning the Grit X is designed for long distance sports enthusiasts who like going off grid.

Analyse your performance for each individual hill to analyse your ascent and descent skills. Get important insights on your ability to use different energy sources and guidance on mid-session fuelling to improve your endurance capabilities. 

Wrist-based power allows you to measure your performance more accurately, allowing you to train smarter. 

The Grit X is tailor-made for extended bouts in tough conditions whether it be cross country or trail.

Feature Highlights

Hill Splitter

Grit X automatically detects uphill and downhill sections giving detailed performance insights without needing to take laps manually so you can attack each hill better. 

Running Power

Wrist-based power measurement means you don’t need a foot pod or power meter. Take your performance to the next level by tracking your power output, managing your training load and setting your threshold zones.

FuelWise smart fuelling assistant

FuelWise analyses your individual metrics and session intensity to calculate your optimal carbohydrate intake and provides fuel reminders. Manual intervals can also be set to suit your needs.  

Route guidance

Upload or follow previous routes with real-time guidance keeping you on track. See what distance you have during your session to pace yourself better.

Route planning with Komoot

Plan or copy other routes in Komoot and import them to your Grit X and receive turn-by-turn guidance.

Energy sources

See your protein, carbohydrates and fats usage each session and how different intensities affect energy usage. Track and train your body’s ability to use specific energy sources so you can go further. 

Strava Live Segments

Get alerts on nearby Strava Live Segments to compete with others on your runs or rides. See real-time performance data and check your results right after you finish.

Advanced wrist-based heart rate

Precision Prime sensor fusion technology sets a new standard for accurate heart rate measurement giving you reliable data to work with.

Nightly Recharge™

Grit X analyses the quality of your sleep and the activity of your Autonomic Nervous System (rest and digest system). Guidance on your recovery state and personalised tips help you manage your training load to prevent overtraining and fatigue.

Sport profiles

Polar Grit X supports over 130 different sports to add to your watch giving you the metrics you need.

FitSpark™ training guide

Receive a choice of custom workouts daily. FitSpark guides you through the session and instructs you on how to perform each exercise correctly. 

Swimming metrics

Track your pool progress with automatic detection of your distance, heart rate, pace, rest times and swimming style. Open water activity can also be tracked.

Phone notifications

Keep connected with notifications straight to your watch face from your phone. Receive alerts from emails, incoming calls, calendar events, messages and more.


Check current weather data and get a 2-day forecast so you are prepared whatever the conditions.

Training Load Pro

Calculate the stress your workouts are having on your body to find the optimal balance between training and rest. Understand how training is straining your cardio and muscle systems (requires power meter if cycling) so you can use the most effective training load to progress.

Running Index

After every run get a maximal oxygen intake (V02 max) estimate to see how your running performance is improving. Your Running Index report in Polar Flow helps improve aerobic capacity and estimates your finish times for different distances, keeping you on schedule for your goals.

Running Program

Get a personal training plan from Polar Flow based on your individual metrics and targets. Your plan continuously adapts as it learns about you, preventing over or undertraining. The programme comes with strength, core and mobility exercises as well as updated predictions of your expected finish time.

Smart Calories

Calculate your energy expenditure using your individual data and training session intensity as well as calories burned. Manage your energy intake and expenditure to replenish your energy stores improving your performance.

Training Benefit

After each training session receive feedback from Polar Flow on which energy systems and areas of fitness and energy systems you have trained, making your training goal specific. 

Sleep Plus Stages

Get a full breakdown of your sleep from individual nights to long term habits. Analysing your three sleep stages allows you to accurately measure and fine tune sleep quality in order to improve your training for that next day.

Serene breathing exercise

Guided breathing exercises help manage cumulative stress, build resilience and improve focus. Biofeedback given in real-time and after the exercise helps release physical and mental tension improving your health and wellbeing.

In The Box

  • Polar Grit X outdoor multisport watch
  • Charging cable
  • User manual
  • Information note
  • Reviews
  • Tech Specs
  • Warranty

Polar Grit X Technical Specifications

Measurements: 47 x 47 x 13 mm

Weight: 64 g with wristband, 44 g without wristband.

Materials: Extreme high strength stainless steel case (with DLC coating on black color version). Glass fiber reinforced polymer back cover.

Display: Always-on color touch display. Laminated Gorilla glass lens with anti-fingerprint coating, protected with forged stainless steel bezel with lugs. Size 1.2”, resolution 240 x 240.

Battery: 346 mAh Li-pol battery. Battery life up to 40 h in training mode (GPS and wrist-based heart rate) or up to 7 days in watch mode with continuous heart rate tracking. Multiple power save options available.

GPS & Barometer: Integrated GPS, GLONASS, Galileo, QZSS. Assisted GPS for fast fix times. Barometric altitude, incline, ascent and descent.**

Connectivity: Bluetooth Low Energy. Custom USB cable for charging and data synchronization.

Watch: Time and date. Alarm with snooze.

UI languages: English, German, French, Italian, Dutch, Norwegian, Spanish, Portuguese, Swedish, Finnish, Danish, Polish, Russian, Turkish, Indonesian, Czech, Japanese, Chinese (simplified)

Sensors: Compatible with all standard BLE heart rate sensors and running cadence and power sensors as well as cycling speed, cadence and power sensors.

Wristbands: Sizing:

S: wrist circumference 130-190 mm

M/L: wrist circumference 145-215 mm

Compatible with standard 22 mm quick release watch bands.

Durability: Operating temperature: from -20° to 50°C. Temperatures below -10°C may affect battery life and performance. Tested against military standards (MIL-STD-810G).

Water resistance: Waterproof (WR100)

Compass: Magnetometer-based compass available in training mode (no GPS needed).



  • Polar Electro Oy issues a limited international guarantee for Polar products. For products which have been sold in the USA or Canada, guarantee is issued by Polar Electro, Inc.
  • Polar Electro Oy/Polar Electro Inc. guarantees the original consumer/purchaser of the Polar product that the product will be free from defects in material or workmanship for two (2) years from the date of purchase, with the exception of wristbands made of silicone or plastic, which are subject to a guarantee period of one (1) year from the date of purchase.
  • The guarantee does not cover normal wear and tear of the battery, or other normal wear and tear, damage due to misuse, abuse, accidents or non-compliance with the precautions; improper maintenance, commercial use, cracked, broken or scratched cases/displays, textile armband or textile or leather wristband, elastic strap (e.g. heart rate sensor chest strap) and Polar apparel.
  • The guarantee does also not cover any damage/s, losses, costs or expenses, direct, indirect or incidental, consequential or special, arising out of, or related to the product.
  • Guarantee does not cover products which have been purchased second hand.
  • During the guarantee period, the product will be either repaired or replaced at any authorized Polar Central Service regardless of the country of purchase.
  • Guarantee issued by Polar Electro Oy/Inc. does not affect the consumer’s statutory rights under applicable national or state laws in force, or the consumer’s rights against the dealer arising from their sales/purchase contract.
  • You should keep the receipt as a proof of purchase!
  • Guarantee with respect to any product will be limited to countries where the product has been initially marketed by Polar Electro Oy/Inc.