Mountain Bike Reviews Forum banner

1 - 20 of 198 Posts

·
Registered
Joined
·
77 Posts
Discussion Starter #1 (Edited)
Lezyne Super GPS Review - NOT RECOMMENDED

I have edited the thread title to add the fact that I can not recommend this device. My initial review below is un-edited and you can peruse the thread to see the problems that I have encountered with this device leading to a negative overall review.

I wanted to post a review of the Lezyne Y10 (2017 model) Super GPS. I did a fair bit of research before buying and did not find a lot of recent reviews. I've used it for 2 months now.

In short, I'd give it a B+ rating, all things considered. I've never used a Garmin or other GPS unit, so all I can do is compare to cheapo cycling computers and what I've read and heard about the Garmins.

It does what I need it to do, although the more I've used it the more I find myself wanting some of the advanced features on the Garmins (520, 820 and 1000). For example, while the screens are somewhat customizable on the Lezyne, your options are pretty basic in terms of the layout. The other features that look better on the Garmins are Strava Live Segments (what you see during the segment) and the ability to quickly switch between bike profiles.

Everything on the Super GPS was easy to set up, and using the device on a daily basis is super easy. For the most part, the data seems very accurate, even in wooded tight singletrack. All you do after a ride is open the app on your phone and sync to the GPS Root (Lezyne's ride-tracking solution) and it auto-syncs the ride with Strava.

Highlights:
- Easy to set up and use

- Ride data seems very accurate (I usually use a speed sensor)

- HR monitor works flawlessly

- Barometer, accelerometer, and GPS+GLONASS in a ~$150 package

- ANT+ and Bluetooth compatible. I had no issues pairing a third-party ANT+ speed sensor.

- Turn-by-turn directions work really well (although the re-routing does not seem to)

- Incoming phone calls and text message notifications are very handy (if you so desire....)

Lowlights:
- Odd elevation data sometimes when turning device on. Lezyne Support offered no solution that worked. What happens is the elevation rapidly races upwards when turning the device on, then over 10-15 minutes slowly corrects itself back to what I know to be the actual elevation. This happens about half of the time. The Lezyne GPS Root app corrects this bad elevation data, but Strava does not, so I'm not getting a true Elevation Gain number. Fortunately, Strava does have a function to correct the elevation data, but this is still an annoyance.

- Incorrect data/feedback for Strava Live Segments. The segment time displayed in real time on the device was many times incorrect and did not match the actual segment time after uploading the ride. It's bad enough that I disabled this feature, and it's one of the reasons I bought the device.

- At times, GPS drift is a problem. There is one segment on my normal route that is 50/50 as to whether it Strava recognizes it as a segment match. Overall, accuracy is very good but the occasional missed segment does bug me.

- Lack of Bike Profile functionality. When you move the device between bikes, you have to remember to manually change the rear tire diameter, bike weight, and bike type if you want accurate on-screen feedback during your ride.

Overall, the device is well worth the money and I'd recommend it for anybody considering it. Hopefully the stuff above helps you in your search.
 

·
Registered
Joined
·
122 Posts
Thanks for sharing your review. I have been going back n forth and unable to decide what to replace my Garmin Edge 500 with. I still might go with a 520 after reading your review.
 

·
since 4/10/2009
Joined
·
30,819 Posts
I've used enough different bikes that I've seen a few different applications of "profiles". Some of them I like, some I don't.

What I want is when it's easy to move my GPS computer from one bike to another. Let's start there.

Devices that use profiles I'm not a fan of:

Garmin Forerunner 310XT - This one is somewhat unique in my comments as it's the only one I've used that has not just different bike profiles (you can set up two), but you can set up run and swim profiles, as well. It's pretty cool in that way. What sucks is that switching profiles is sortof a "hidden menu" you have to access. It's easy to forget to switch profiles.

Bryton Rider 310T - This one permits two bike profiles. Switching them requires digging through menus to find that setting. There is no quick access menu, hidden or otherwise.

Garmin Edge 520 - This one is the easiest in this regard. What's coolest, IMO, is that the profiles aren't necessarily tied to a bike. You can pretty much use any profile on any bike. The sensors, for the most part, are even bike-agnostic. The only ones that aren't would be the ones that have a specific measurement tied to them like wheel sensor and its circumference setting. The computer just picks up whatever sensors are paired and active regardless of profile. And when you turn it on, the first thing you do is select the profile you intend to use, and you've got enormous flexibility in displaying which data you want to see.

Barometric altimeters have little quirks on every device I've used that had them. You usually learn to deal with them and hope it's just a software quirk that gets fixed eventually.

Strava live segments seem to be a bit flaky no matter which device you use. Many segments I know of are not terribly accurately recorded in the first place, so that compounds the problems. There are many factors that affect GPS accuracy and will result in low accuracy in your track. Some of them are consistent (some places are not the best), and some are not (space weather is a thing and it will affect the accuracy of your GPS data - so will certain atmospheric conditions).

I am curious how Lezyne is supposed to handle re-routing when the device doesn't have basemaps. Is it supposed to be communicating with your phone for that and the phone is supposed to feed those prompts?
 

·
Registered
Joined
·
77 Posts
Discussion Starter #4
Yes, for re-routing you need the Lezyne app open on your phone. For the original directions, with no re-routing, I believe you can do a "push" of the route to the GPS unit but I'm not positive, as I always use the GPS while paired with my phone anyway.

As a side note that I did not mention in my review, the Lezyne GPS Root is not very good for creating Routes/turn-by-turn directions. I use RideWithGPS to create the route, and then import the tcx file into the Lezyne GPS Root.
 

·
Registered
Joined
·
5,359 Posts
Lowlights:
- Odd elevation data sometimes when turning device on. Lezyne Support offered no solution that worked. What happens is the elevation rapidly races upwards when turning the device on, then over 10-15 minutes slowly corrects itself back to what I know to be the actual elevation. This happens about half of the time. The Lezyne GPS Root app corrects this bad elevation data, but Strava does not, so I'm not getting a true Elevation Gain number. Fortunately, Strava does have a function to correct the elevation data, but this is still an annoyance.
.
Are you turning the device on indoors, and then immediately going outside to start riding? This can cause issues with the barometric altimeter if there is much of a change in temperature between indoors and outdoors.

What I do with my Garmin Edge 520, which should work with your Lezyne SuperGPS too, is to turn it on 20 minutes or so before I intend to set off and leave it to stand somewhere at outdoor temperature so that it has a chance to settle down beforehand.

I used to leave it in the back garden but at my current house the garage is outdoor temperature so I leave it there on the bike now. It just needs to be somewhere safe that has the same conditions as outdoors.

By doing that any bad altimeter or temperature readings you see initially will have cleared by the time you actually begin recording the ride, so that your ride data on Strava should be good in future.:)
 

·
since 4/10/2009
Joined
·
30,819 Posts
Yes, for re-routing you need the Lezyne app open on your phone. For the original directions, with no re-routing, I believe you can do a "push" of the route to the GPS unit but I'm not positive, as I always use the GPS while paired with my phone anyway.

As a side note that I did not mention in my review, the Lezyne GPS Root is not very good for creating Routes/turn-by-turn directions. I use RideWithGPS to create the route, and then import the tcx file into the Lezyne GPS Root.
I like the routes that you make with RWGPS. I use them on my Edge 520, also. Programmed well, the turn prompts are great.

Yeah, I'm not a big fan of keeping my phone paired with the GPS all the time. I only pair the devices when I want to upload. Once I did it for weather updates on a long road ride, but otherwise, nope. I want to save my phone battery and data and all. And I could care less about phone/txt notifications.
 

·
Registered
Joined
·
77 Posts
Discussion Starter #7
Are you turning the device on indoors, and then immediately going outside to start riding? This can cause issues with the barometric altimeter if there is much of a change in temperature between indoors and outdoors.

What I do with my Garmin Edge 520, which should work with your Lezyne SuperGPS too, is to turn it on 20 minutes or so before I intend to set off and leave it to stand somewhere at outdoor temperature so that it has a chance to settle down beforehand.

I used to leave it in the back garden but at my current house the garage is outdoor temperature so I leave it there on the bike now. It just needs to be somewhere safe that has the same conditions as outdoors.

By doing that any bad altimeter or temperature readings you see initially will have cleared by the time you actually begin recording the ride, so that your ride data on Strava should be good in future.:)
Good thoughts, but I've tried everything you mentioned. I'm going to take a video and send it to Lezyne. For today's ride, I turned the device on early and let the altitude settle. All was well. I was waiting for my buddies to get ready and the device auto shut down. When I turned it back on, the altitude raced upwards again! Very odd. It would seem it has to be a firmware issue.

I don't want to focus too much on this issue, because there are workarounds and I'm otherwise pretty happy. Little things like this just seem to bother me. Probably because I'm in the software business and I'd never hear the end from my customers on something like this!
 

·
since 4/10/2009
Joined
·
30,819 Posts
Good thoughts, but I've tried everything you mentioned. I'm going to take a video and send it to Lezyne. For today's ride, I turned the device on early and let the altitude settle. All was well. I was waiting for my buddies to get ready and the device auto shut down. When I turned it back on, the altitude raced upwards again! Very odd. It would seem it has to be a firmware issue.

I don't want to focus too much on this issue, because there are workarounds and I'm otherwise pretty happy. Little things like this just seem to bother me. Probably because I'm in the software business and I'd never hear the end from my customers on something like this!
Totally understandable. One of Garmin's altitude workarounds was to have their edges auto calibrate the altimeters with a couple different methods. They use satellite auto calibration when accuracy is good enough, but they'll also auto calibrate elevations from saved waypoints. Garmin has had quite a few issues with their barometric altimeters being wonky over the years. I think it's less a software issue than a hardware quirk that requires surprisingly complicated software solutions to address.
 

·
Registered
Joined
·
5,359 Posts
Good thoughts, but I've tried everything you mentioned. I'm going to take a video and send it to Lezyne. For today's ride, I turned the device on early and let the altitude settle. All was well. I was waiting for my buddies to get ready and the device auto shut down. When I turned it back on, the altitude raced upwards again! Very odd. It would seem it has to be a firmware issue.
That does appear to be a bug.

Can you disable auto shut down as an option on the Lezyne? If it had kept running, rather than shutting down, forcing you to start the boot cycle again, then it sounds like you would have been ok for the ride itself?
 

·
Registered
Joined
·
77 Posts
Discussion Starter #10
Another good thought, WR304, and something I looked for! But the Lezyne does not allow this to be changed. Yes you are correct, I would have been fine if the device did not shut down and need to restarted. It settled-in to 900-some feet and I figured I was all set. My bike sat there untouched. I turned it back on and it raced up to 1,500+ feet and slowly returned to proper altitude somewhere around the 10-15 minute mark in my ride.

It might be a hard sell to Lezyne as an issue on the elevation, as their GPS Root automatically corrects this bad data automatically. But the auto-sync to Strava does not, so I have to manually recalculate it within Strava (to use GPS-based elevation rather than the Lezyne-recorded elevation).
 

·
since 4/10/2009
Joined
·
30,819 Posts
I have to manually recalculate it within Strava (to use GPS-based elevation rather than the Lezyne-recorded elevation).
FYI, Strava is not using GPS-based location for corrections. GPS-based elevation is calculated on-device based on a high accuracy 3D position fix. Most corrections are done by matching the location of each position of the track with a separate elevation database (a digital elevation model, or DEM). Strava recently went one step further and is now crowd-sourcing elevations by using data that people upload from devices with barometric altimeters.

https://support.strava.com/hc/en-us/articles/115000024864-Announcing-Strava-s-Elevation-Basemap
 

·
Registered
Joined
·
77 Posts
Discussion Starter #12
Elevation Bug Video

For anybody who's interested, here is a little vid I took of the elevation bug. Note the stable (and correct) elevation of 987 feet. I turn the device off and back on, and the elevation races skyward. What I did not record, because it takes 10-15 minutes, is the very slow return back to correct elevation.

https://youtu.be/yWjVpC0ir7U

I was underwhelmed with the support from Lezyne. Just something we'll have to live with and look for a fix in one of their updates.

While I took the video in my garage, I have done this outdoors in the clear many times and the results are the same.
 

·
Registered
Joined
·
77 Posts
Discussion Starter #13
Elevation Bug Workaround

Just to use this thread as a knowledge base for others, here is an update on a fairly obvious workaround I've started using for the elevation bug:

Problem Summary (so you don't have to read the whole thread): Sometimes when turning the device on, the Elevation rapidly races upwards to a ridiculous figure. Then over 15 minutes or more, slowly corrects itself. This gives you bad elevation data for your ride. If you turn the device on in advance of starting your ride, in theory it will correct itself before you start your ride. Problem: The device auto-shuts-off within approx 10 minutes. So you turn it back on, and you're back to square one with the Elevation bug.

Workaround: Turn the device on in advance of your ride, AND start recording a session. This way the device won't auto-shut-off, and you can let it sit there as long as you want and wait for the Elevation to correct itself. When you're ready to actually start riding, stop recording and simply discard the pseudo ride.
 

·
Registered
Joined
·
77 Posts
Discussion Starter #14
Strava Live Segments

Adding the the knowledge base on the Super GPS, this time with Strava Live Segments feedback:

If you are using a speed sensor and want exacting Live Segment feedback on the Super GPS while riding, make sure your speed sensor is calibrated perfectly (by "calibrated," I mean you have the correct tire circumference entered so that distance reported by the Super GPS matches actual distance traveled).

What I found is that if you are NOT using a speed sensor, Live Segment feedback is based on the GPS coordinates of the Start & End points of the segment. That's pretty good, but we all know there are benefits to running a speed sensor.

If you ARE using a speed sensor, the live segment time displayed on the Super GPS is based on the GPS coordinates start point plus distance traveled per your speed sensor (ignoring the GPS location of the segment end point).

What this means is that if your speed sensor is not calibrated perfectly, the Live Segment time displayed on your unit while riding will not match the actual segment time reflected in Strava when you upload your ride. I noticed this because on a long segment when I knew I passed the actual segment end point, the Super GPS still showed I had 0.X miles to go. My speed sensor was not perfectly calibrated at that time, so the Lezyne was under-reporting distance traveled.

Strava ignores the speed/distance data from Lezyne units anyway, so the segment time within Strava will be accurate even if your speed sensor is calibrated wrong, but just be aware what you see in realtime on the Super GPS will be wrong if your speed sensor is calibrated wrong.
 

·
Registered
Joined
·
366 Posts
I've been using the Lezyne Micro GPS with the bundled heart rate and cadence sensors for 4 months now, and I am sadly pretty disappointed with it.

My main issues:
Elevation data - Goes crazy at the start of the ride, as other people discussed. Takes 20 minutes or more to start being accurate.

GPS Drift - sometimes subtly, sometimes in huge jumps, the GPS drifts around. Most of the time I'm lucky to get a third of the Strava segments I ride to be recorded, and who knows how inaccurate my time is on them.

Heart Rate Sensor - the first one I had had one of the metal snaps fall off... no way to repair it. Lezyne was great about sending me a new one, but that one stopped working in about two weeks. Nothing I could do would revive it. I should send it back too but I kind of just gave up on tracking my heart rate.

My two main reasons for getting a GPS were to save my cell battery and to see vertical feet in real time on my rides. My iPhone is more accurate with GPS. I keep hoping for a FW update from Lezyne that will magically fix all this, but it seems like the release updates once every three months or so.
 

·
Registered
Joined
·
84 Posts
I sent my enhanced super gps back after 1 ride. I'd rather just use my galaxy s8+. It seems more accurate anyways. If I was a guy that didn't wear a backpack all the time I would have kept it. I give it a B overall.
 

·
Registered
Joined
·
1,022 Posts
Micro C GPS for me guys, aside from elevation and temp data that doesn't seem to be that accurate everything seems to be fine for my rides, MTB.

The new firmware 4.114 adds support for more than one bike, too early to say if it fixes or improves any features or sensor accuracy.
Here is my quick experience with the GPS and the changes I found on the new formware:
https://youtu.be/FRpK2pxrkdQ
 

·
Registered
Joined
·
77 Posts
Discussion Starter #20
Good catch on the firmware update release, and nice vid (assuming that's you).

The elevation bug is not fixed, but major props to Lezyne on the bike profiles and ability to configure the GPS from your phone. Some other nice little features too, like you pointed out on your vid. Very nice update by Lezyne!
 
1 - 20 of 198 Posts
Top