Once upon a time, there were wheels that actually showed your real speed and distance… Sounds like a fairy tale, right? But yeah, that’s how it used to be. Nowadays, if someone tells you their wheel doesn’t overreport speed and distance, that’s what I’d call a fairy tale. Yep, these days pretty much every wheel shows more speed and distance than you're actually doing. And nope, it’s not about different tires or tire pressure. There’s this unspoken rule among wheel manufacturers that every wheel should exaggerate its speed and distance readings—by a few percent or even more! On paper, it makes the wheel look faster and more appealing, especially to those who treat breaking speed records like a life mission. But if you compare what your wheel says with GPS data, you’ll find that your “90 km/h (56 mph)” is more like a “meh, 78 km/h (48 mph)”.
I don’t know about you, but I like knowing how fast I’m really going and how far I’ve actually ridden. And judging by social media, a lot of people feel the same. That’s why EUC World has had a feature for a while now that lets you adjust the speed and distance readings. All you need to do is set the right correction value. In this article, I’ll show you how to do it in a super simple and accurate way. Note: this won’t change what your wheel’s display shows, or what other apps show—this only affects EUC World.
Preparing for calibration
So, what do you need? Just a few kilometers of road where you won’t have to stop too often. It doesn’t have to be a perfectly straight stretch, and it doesn’t need to be totally free of trees or buildings. Just avoid dense, high-rise urban areas, as they can mess with GPS accuracy. And GPS is exactly what we’ll be using to determine the correction. Important: don’t ride too fast! The longer the ride, the better, but don’t overdo it. About 15 minutes at 30 km/h (20 mph) should be plenty. Make sure not to go indoors, into tunnels, or anywhere GPS signal might drop. Also, keep your phone in a place where it gets good satellite signal—shoving it in a backpack is probably not the best idea.
Go for a ride!
When you’re ready, follow these steps:
- Be outside and ready to ride. Make sure your wheel is turned off. Yes, turned off.
- Open the EUC World app. Once the main screen shows up, swipe up to go to the GPS view.
- Wait a few seconds after the GPS values appear—this gives the GPS time to “warm up”.
- Now turn on your wheel. After a moment, EUC World should connect to it automatically. If not, connect it manually.
- Go to the app menu and tap on menu item, then scroll down to and check that both and sliders are set to 0 %. If they’re not, set them to zero. If those settings are greyed out, it probably means tour recording or data logging is active. Turn those off, then set the corrections to 0 %.
- Exit the menu and check both the GPS and EUC screens (by swiping up and down). Both distance and average riding speed should read zero. If not, close and reopen the app, and double-check GPS is active (tour recording button in the top right part of the app is white or green) and your wheel is connected. From now on tour recording and/or data logging may active.
- Go for a ride as described above. No rush—try to ride smoothly and avoid unnecessary stops. After about 15 minutes, stop and take screenshots of both the EUC and GPS views. To take a screenshot, just press the Power and Volume Up buttons at the same time (or use any method that works for your phone). Alternatively, just note down the distance and average riding speed from both screens.
- Now, use the calculator below to figure out what correction values to enter into EUC World so it’ll show your real speed and distance from now on.
Important: you need to set the corrections while your wheel is connected to the app. If you do it while it’s not connected, those settings will only be saved as default values for future wheel connections. EUC World accepts correction values from -25 % to 20 %. If the calculated correction is displayed in red, it means it’s outside that range.
If your wheel is connected but the correction settings are still greyed out, it’s probably because tour recording and/or data logging is active. Turn those off and try again.
Some settings can’t be changed while tour recording or data logging is active. Changing them could lead to inconsistencies in the recorded data. So if you see a setting in the app that’s greyed out but you think it should be active, it might be because one of those two features is currently running.
That’s it!
If you did everything right—and luck was on your side—your wheel should be calibrated on the first try. But if something didn’t quite work out, just give it another shot. It’ll definitely go better next time! Remember that you can check any time if your wheel and GPS still match up. When your wheel connects to the app, EUC and GPS readings are synced, so you can swipe up and down during your ride to compare the two.
