• Warning!!

    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.

    UK Pedelec Law

    Worldwide Laws

    We advise members great caution. EMTB Forums accepts no liability for any content or advice given here. 

Bosch gen 3 smart system speed box 1.0 tuning

Aerosaabman

Member
Joined
Aug 30, 2023
Messages
4
Reaction score
4
Location
Cornwall
I’ve recently fitted the SpeedBox 1.0 b tuning to my gen 3 Bosch smart system and it was working great. Absolute night and day in terms of enjoying the e-bike. However I’ve recently got a problem in that my bike is failing to charge fully. Basically will charge for a max of 20 mins and then cuts out. I have to unplug and plug back in for it to start charging again. I have reset the battery bms, removed it and charged direct and am at a complete loss. Have removed the SpeedBox in preparation for what feels like an inevitable trip to the trek dealer.
 
⚡ EMTB Pro Go Pro — Living Intelligence Reports, exclusive discounts & ad-free Up to 25% off Peaty's, PEMBREE, Magicshine & more · Ad-free browsing · Pro badge See the deals →
Are you sure it's the bike and not the charger possibly over heating?
Have you tried a different wall outlet for the charger?
 
Are you sure it's the bike and not the charger possibly over heating?
Have you tried a different wall outlet for the charger?
That’s my next step as I did wonder if it might be a thermal issue. Going to borrow a mates charger to eliminate another variable.
 
So I tried my charger on a friends Mondraker which has the same charger. It failed to charge it so a new charger it is!
 
I personally haven't heard of tuning affecting battery charging. Specifically, the SpeedBox is connected to a completely different communication.
 
Keep reading
    Browse all

    Similar Threads

    Community Stats

    Since 2018
    670K
    Messages
    41,175
    Members
    Join 30,000+ Riders, it's free!
    Back
    Top