Product Comparison: Polar M450 vs Garmin Edge 25

General Specifications
About the Product
A bike computer designed to support all riding styles and goals. Stylish, customizable and value for your money.
Go the extra mile. Edge 25 captures essential stats from your ride, including time, distance, speed, total ascent and location. When paired with a heart rate strap¹, it also records your heart rate and heart rate zone so you’ll know when you hit your target. Heart rate compatibility also provides more accurate information on calories burned during your ride.
Edge 25
Key Specs
Barometric altimeter
Type Of Tracking
Tracking Details
Time, Distance, Speed, Heart rate, Calories, Cadence, Power, Altitude, Ascent / descent, Power phase, Lap time
Time, Distance, Speed, Heart rate
What customers say about "Key Specs"
Polar M450 GPS Bike Computer
  • We find the GPS for M450 works flawlessly. In fact, you can use either bike computer without a speed and cadence sensor and the GPS will give you very accurate speed and distance traveled data.
  • Elevation data is pretty accurate as long as you calibrate before each ride.
  • Being able to track my heart rate/speed/elevation and map my route really helps motivate me to beat yesterday's stats.
  • Works great, gps acquires quickly, stores lots of ride data.
  • This has been a solid, capable, and reliable basic bike gps for me.
Garmin Edge 25 Cycling GPS
  • I have owned this Garmin Edge 25 for about two months and it has worked perfectly. It did flake out a little on me after one of the software updates but after I reloaded the software again, it was good to go.
  • That being said, I love this thing. It definitely saves my phone battery by not having to run strava for hours at a time.
  • The GPS finds satellites very quickly.
  • Build-in GPS tracking. No wiring or sensor needed to be install on your bike.
  • GPS is not always reliable. It could give you false reading and long GPS lock.
Size & Weight
2.91 in.
1.6 in.
1.75 in.
1.6 in.
0.53 in.
0.7 in.
1.8 oz.
0.9 oz.
Display Size
1.36" x 1.36"
0.9” x 0.9”
128 x 128 pixels
128 x 160 pixels
3D-Map View
What customers say about "Display"
Polar M450 GPS Bike Computer
  • The M450's display is black and white, but is very visible in bright sunlight. The M450 is better than the V650 as far as visibility in bright light.
  • Screen is easy to see in sun.
  • The display is large enough, there are several views of the data. The GPS connects quickly, even inside my house.
  • The display is easy to see, it's pretty compact, and lightweight.
  • Perfect size and the features are great. I like the large number display that is easy to read in bright daylight.
Garmin Edge 25 Cycling GPS
  • The screen is very easy to read. You can flip between a clock, a 2-line data screen, 3-line data screen, a very rough map when you reload and follow a course, pacing for the preloaded course and heart rate functions if you buy the optional heart rate sensor as well as cadence sensor.
  • The display is just big enough to give me the info that I have to have and I can read it while riding down the trail I monitor speed, distance and HR all the time. There is LOTS more info if I need it.
  • It's small, lightweight, and I like that it fits on my stem. Easy to read, and seems pretty reliable.
  • The physical design is perfect, as it is small but still easy to read.
  • Excellent little unit. Have had it for close to a month and I've only needed to charge it once. I would rate it 6 stars if it had the ability to display max speed on the screen (you get it later using Garmin Connect or Strava).
Maps & Memory
Riding history up to 35 hours
Up to 10 rides
Realtime Map Updates
Smartphone Compatible
USB, Bluetooth
Cable connection, Bluetooth
Environmental Protections
Polar Flow compatibility, Barometer with real-time VAM
Smart notifications, Customizable data pages, Auto Pause, Auto Lap, Virtual Partner, Auto scroll, Foot pod capable, Cycling Courses, Time/distance alerts, Garmin Connect, Automatic sync
What customers say about "Features"
Polar M450 GPS Bike Computer
  • Even though the M450 is smaller and less expensive, it is pretty capable and records temperature during the ride, which the V650 does not.
  • I already had a heart rate monitor (not Polar-brand but an off-brand HRM) that I was easily able to sync up to the M450.
  • Easy to setup, easy to pair with sensors and mobile devices.
  • Can upload data directly to Strava and other social sites. Great computer for the price.
  • Nice computer, especially for the price. I just recently realized you can customize the display views, which is awesome!
  • I sometimes have had sync issues uploading rides.
Garmin Edge 25 Cycling GPS
  • The 25 pairs to my smartphone perfectly and downloads automatically. It also pairs to my cadence, speed and heart rate sensors.
  • With 4 buttons, you would think it would be easy to put the thing into the same time distance speed display I would use on pretty much every ride.
  • This little device is amazing and was very easy to set up. I like the ability to add Ant+ devices when desired and the ability to link to the iPhone.
  • Very lightweight. Mounting seems a tad sketchy, but so far no failures--will update. After the ride gives you vertical distance climbed and calorie burn.
  • There are a couple of issues with the bluetooth connection to my phone.
Battery Life
16 hours
8 hours
Battery Type
Rechargeable 400mAh battery
Rechargeable lithium-ion
What customers say about "Battery"
Polar M450 GPS Bike Computer
  • Battery life will easily outlast a century ride.
  • Does the job. Small and light-weight. Battery life seems long.
  • Great product, small, light and compact. Great battery life as well.
  • Long lasting battery, easy to see screen in the sun, and lots of information including altitude and temperature.
  • Easy to read while riding. Battery lasts long between charges.
Garmin Edge 25 Cycling GPS
  • I like the Edge25 for its simplicity and (very) small size. After 6 months of use, I generally get about 8 hours from a full battery charge
  • Battery life is good. Lasted on an 8 hour ride, but I also have the Bluetooth turned off.
  • If the duration of this battery is long, still better
  • Battery holds a good charge. I've done several 2-3 hour rides on it. I charge it before each ride and it's always shown 3/4 full on battery at the end of my rides.
  • What is a drawback is the charge only lasts a few hours. I used up half the charge after riding just over 1-1/2 hours. At most I will get 4-5 hours max of operation before the battery is used up.
  • The battery was good for maybe three 2 hour rides before it needed to be recharged.
Warranty / Certifications
Manufacturer warranty
2 year(s)
1 year(s)
Other Information
169.99 $

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