Riding a tuned or deristricted EMTB is not a trivial offence and can have serious legal consequences. Also, many manufacturers can detect the use of a tuning device or deristricting method and may decline a repair under warranty if it was modified from the intended original specification. Deristricting EMTB's can also add increased loads for motors and batteries. Riding above the local law limit may reclassify the bike as a low-powered bike, requiring insurance, registration and a number plate.
Be aware of your local country laws. Many laws prohibit use of modified EMTB's. It is your responsibility to check local laws. Ignoring it, has potential implications to trail access, and risk of prosecution in the event of an accident.
We advise members great caution. EMTB Forums accepts no liability for any content or advice given here.
For accuracy on my previous bike i aactually lowered the circumference by about 9% to give correct odometer, in turn you also get 9% more speedI've got it derestricted with stunlocker. Just have it at 32kmh at the moment. I haven't tried the circumference tuning yet as I like having an "accurate" speedometer.
That shitty adjustment in the shimano app only changes the speed displayed. It doesn't effect distance recorded or actual assistance speed or anything else of any use.That's exactly what l did, although l got about 5% more speed as mine wasn't so far out.
l could probably have adjusted that in the Shimano app as it has a setting for a +/- 5% speed adjustment
Every little helps !!
You do realise tho that you might have blown your warranty with doing this as I did the same and was told that it voided the warranty. Only hearsay but just something to think about and maybe checkout before doing it.Check that your circumference is set correctly, mine was factory set at 2360mm and the actual circumference of the tyre l measured at 2250mm
l changed it to the actual value and the speedometer is now within 1km of Strava on a 40km ride.
The World's largest electric mountain bike community.