Advertising Disclosure Garmin Forerunner 45 Vs 45s Size Comparison Comparison - June 2026
4 Best Garmin Forerunner 45 Vs 45s Size Comparison In the UK
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| 1 Best Choice  9.8Exceptional | 2  9.7Exceptional | 3  9.5Excellent | 4 Best Value  9.3Excellent |
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ModelGarmin Forerunner 165 Music GPS 43mm Running Smartwatch, Lightweight, AMOLED Touchscreen, Advanced Training & Insights, Safety & Tracking Features, up to 11 days Battery Life, Black | Model Garmin Forerunner 55 GPS 42mm Running Smartwatch, Easy to use, Lightweight, Training Guidance, Safety & Tracking Features, Whitestone | Model Garmin Forerunner 55 GPS 42mm Running Smartwatch, Easy to use, Lightweight, Training Guidance, Safety & Tracking Features, Aqua | Model Garmin Forerunner 165 GPS 43mm Running Smartwatch, Lightweight, AMOLED Touchscreen, Advanced Training, Insights and Features, Safety & Tracking Features, up to 11 days Battery Life, White |
BrandGarmin | Brand Garmin | Brand Garmin | Brand Garmin |
Reviews | Reviews | Reviews  | Reviews |
Tech Specs | |||
product dimensions4.3 x 4.3 x 1.16 cm; 39.12 g | product dimensions 4.2 x 4.2 x 1.2 cm; 37 g | product dimensions 4.2 x 4.2 x 1.2 cm; 37 g | product dimensions 4.29 x 1.17 x 4.29 cm 39.12 g |
batteries1 Lithium Ion batteries required. (included) | batteries 1 Lithium Polymer batteries required. (included) | batteries 1 Lithium Polymer batteries required. (included) | batteries 1 Lithium Polymer batteries required. included |
languageMultiple Languages | language Multilingual | language English, French, German, Italian, Polish, Spanish | language - |
Available On | Available On | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.8
1Garmin24% OffGarmin Forerunner 165 Music GPS 43mm Running Smartwatch, Lightweight, AMOLED Touchscreen, Advanced Training & Insights, Safety & Tracking Features, up to 11 days Battery Life, Black
Main highlights- With training effect and training effect labels, you’ll see how your workouts impact your fitness and understand the primary benefit achieved from your workout; recovery time lets you know how long you need to recover before your next high-effort workout.
- Up to 11 days of battery life in smartwatch mode and up to 19 hours in GPS mode
- Safety and tracking features, including incident detection (during select outdoor activities) and Assistance, send a message with your live location to emergency contacts when paired with your compatible smartphone; requires setup and your smartphone to be in an area with network coverage where data connectivity is available.
- Reach your goals with personalised daily suggested workouts that adapt based on performance and recovery; use Garmin Coach and race adaptive training plans to get workout suggestions for specific events.
- Never miss a call or text with smart notifications from your paired Android or Apple smartphone
- Leave your cash and cards at home; Garmin Pay contactless payments let you pay for purchases on the go (with a supported country and payment network).
- Easy-to-use running smartwatch with built-in GPS for pace/distance and wrist-based heart rate; brilliant AMOLED touchscreen display with traditional button controls; lightweight design in 43 mm size.
- Download songs to your compatible watch, including playlists from Spotify, Amazon Music or Deezer (subscription required), and connect with your wireless headphones for phone-free listening.
- As soon as you wake up, get your morning report with an overview of your sleep, recovery and training outlook alongside weather and HRV status (data presented is intended to be a close estimation of metrics tracked)
- 25+ built-in activity profiles include running, cycling, HIIT, strength and more.
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9.7
2Garmin32% Off
Garmin Forerunner 55 GPS 42mm Running Smartwatch, Easy to use, Lightweight, Training Guidance, Safety & Tracking Features, Whitestone
Why we love it
Tracks heart rate and GPS effortlessly.
Offers adaptive training plans.
Includes wellness and activity tracking.
Main highlights- Value for money
- Good product with good quality
- Easy to use: Convenient and simple use
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9.5
3Garmin33% Off
Garmin Forerunner 55 GPS 42mm Running Smartwatch, Easy to use, Lightweight, Training Guidance, Safety & Tracking Features, Aqua
Why we love it
Easy to use for beginners.
Tracks multiple activities efficiently.
Offers personalized training plans.
Main highlights- With the simple press of a button, a user can start their run or walk and track their time, distance, speed and more
- Tune in to your body with advanced wellness features, such as intensity minutes, fitness age, Body Battery energy monitoring, stress tracking and more
- Track all the ways you move with built-in activity profiles for running, cycling, track run, virtual run, pool swim, yoga, breathwork and more
- Take the guesswork out of your runs with suggested workouts based on your training history, fitness level and recovery time
- Run your best with helpful training tools, including race time predictions and finish time estimates
- Plan your race day strategy with the PacePro feature, which offers GPS-based pace guidance for a selected course or distance
- Garmin Coach training plans offer on-screen guidance from expert coaches and free 5K, 10K or half-marathon training plans that adapt based on a runner’s goals
- Easy-to-use GPS running smartwatch monitors heart rate at the wrist and uses GPS to track how far, how fast and where you’ve run
- Automatically upload activities to the Garmin Connect app, and download custom watch faces, data fields and apps from the Connect IQ Store
- All-day activity tracking counts steps, calories, sleep and more
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Value for money
topchoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
Value for money
topchoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
