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245/935/945/F6: most accurate Garmin Watch for Runners?

Former Member
Former Member

Hello everyone, this is my first post on Garmin Forums!

I'm a runner mainly competing in long distance races (half & marathons), upgrading from an old FR220.

My main concern is GPS accuracy : ability to track distance correctly, and measure real-time pace in a relative precise manner (some GPS devices seem to handle that better than others even though a footpod may also be considered). Not necessarily interested in firsbeat metrics. Music would be a nice to have though ;)

I’ve went through a lot of reviews, forum threads + conducted my own research on Strava (looking at tracked distance on recent Marathons & Half-Marathons).
So far my choice narrows down to the following devices:

- FR 235: by far most used device on Strava on long distance races and distance tracked seem simply excellent. Device is fairly old and may soon reach End-of-Support but is that an issue?
- FR 935: 2nd most used watch right behind FR235, often praised for its accuracy on reviews + forum threads. 
- FR 945: struggled at launch but latest firmware updates seemed to correct many issues w/ GLONASS. 
- FR 245: same as FR945
- Fenix 6 Series: reviews do not praise its GPS accuracy yet a lot of people report excellent real-time pace tracking with firmware updates. Couldn't find many F6 users on Strava, distance tracked seemed very good (about 300m off on average on marathons) but the sample was very small. 

I've been undecided for a while and would be happy to hear your feedbacks. 
Is there a general consensus on the most accurate device?

Thanks!

  • Hi, my 945 power consumption is really low compared to my previous Fenix 3.

    Older gps may have better accuracy but the newest Sony GPS chipset is in every new watch because of its low  power consumption. It's really a big difference and a huge step forward.

  • hello,

    check also this thread out:

    https://forums.garmin.com/sports-fitness/running-multisport/f/forerunner-945/207680/feedback-for-gps-2-60

    i think it depends on what type of athlete you are :-). if you're looking for good gps tracking, the 920 / 935 are doing a better job compared to the 945. if you want gimmicks like music, maps and pay with a drawback of a less accurate tracking go for the 945. but if you're somebody who wants for example to go under 3h for the marathon, where every meter counts and if you pace yourself by using the watch complementary to marked km - i'd choose the 935; or who knows, perhaps garmin might come up with a better gps fw that will sort this out but that's a long shot. i'll be running valencia marathon this sunday and i'm really considering taking the 935 instead of the 945...

  • Former Member
    0 Former Member over 5 years ago in reply to tsofron

    Hey! Thanks for the feedback and most importantly good luck with the race on Sunday. It's a very nice and flat track with ideal weather conditions at this time of the year, hope you will smash your PB!

    My pb on a Marathon is 2:46, I run mostly on urban areas and on tracks. A couple of trail running here and then to work on hills but that's about it. I bought a Stryd last night but still need the watch to go with it ;)
    I've ruled out the 235 given that its fairly old and quite comparable to the 935 for GPS accuracy. So I'm torn between the 245 and the 935. 
    What would you recommend?

  • Does the 245 not have the same Sony GPS chip as the 945?

  • thanks a lot ;-). i've been running valencia marathon since 2013, unfortunately even if it's december it's above 25 celsius so that's a struggle for me. so most probably no pb, but just another race. regarding the 945 / 245 - as it has been answered below, they share the same sony chipset, so most probably they both behave the same in terms of gps accuracy. so i'm just hoping garmin will sort out their issues and they'll manage to provide at least the same accuracy as the 935 does; i would still recommend the 945, with the aforementioned remarks (don't rely too much on proper pacing and use the stryd for that); you'll see that the stryd provides you with tons of other useful data, that hopefully will make you even a better runner ;-)

  • Former Member
    0 Former Member over 5 years ago in reply to tsofron

    Oh my bad for some reason I assumed this was your first time in Valencia, you've got a quite an experience there!
    I'm really looking forward to working with a Stryd footpod (until then I was mostly focusing on HR zones in intervals and not really on pace). Will see if it helps to shave minutes off in Paris Marathon.
    I get your reasoning for the 945 and this is why I ruled it out (also because it's an overkill, I mostly run and won't be wearing that watch 24/7). Choice is up between the 245M and the 935

  • Former Member
    0 Former Member over 5 years ago

    Update: bought a Stryd foot pod last night. Still undecided between the 245 & 935 (both are compatible with Stryd)!

  • Yes, they do share. Worthy also noting that even other manufacturers using the same chipset do hope that with Garmin (word's market leader) adopting it, Sony will be able to improve its accuracy without compromising (at least too much) the battery consumption. This probably comes with a ton of money but that I don't know...

  • Stryd gets good reviews, but not the only option. I have a pair of runscribe pods, and their pace accuracy is fantastic.

  • nooo worries ;-) - just wanted to tell that in order to break the monotony i've registered to malaga in 2 weeks from now as well ;-). have fun with the stryd - the other option would have been runscribe, at least when it had the same price as the stryd, but now even with the black friday discount it's a bit on the expensive side. oh - and see you in paris too, i'm there as well - a friend told me there's literally a feast at the end of the race :-)