When installed the speed displayed on the app is half the real speed. This creates a problem when climbing hills. The bike thinks you are only doing 3-4mph and this causes the power to be dramatically reduced. Exactly what you don’t want.

I have a Speedfun adaptor and have noticed two things about it. First, the speed indicated on the app is about 50% of the real speed. Is this normal? Such a dramatic reduction in indicated speed seems to mess up the power curve characteristics a lot. Second. I put the bike on a stand and fitted a speed sensor to the rear wheel. Without the Speedfun, the bike will spin the rear wheel at 15.7mph when slowly turning the crank. When I install the Speedfun the motor still only turns the rear wheel at 15.7mph. Is this correct or is my Speedfun faulty?

Hi Dave, thanks for posting this video, it's an interesting device. Their website states it will falsify information on any Mahle related app, like the speed info you pointed out, which is a pity for me as it's the only one I use.

Nice Dave..thats the yoke im looking for. Funny how funspeed limits the Mahle to 19mph. ❤❤❤

I also bought speddfun ghost for my merida esilex. Even the app shows less speed, the motor still cuts at factory level. No gain at all... :(

Hiya would this work on a DBR coniston ebike thanks

Hi Dave ,yes arrows was in line it worked for a few seconds. Then a warning come on mahle that something was wrong and it switched off . I’m mistified .any body out there got ideas .thanks Tony

Thanks for video. Funny though Speedfun is still just another speed restrictor. It just increases your speed but still limits it. I use a Speedbox on a Bosch Performance Line Speed 28mph in the United States and it really is a speed de-restrictor as it totally removes the limit so you are no longer renting your bike from an ebike motor company. So funny government puts restrictors on bicycles but won't do the same thing that could easily be done to something that really does injure or kill pedestrians including cyclist every day, cars.....Btw, I normally can hit speeds in my sprints up to 40mph on my acoustic/mechanical race bikes. I am simply asking to be able to do that with my ebikes I have bought. (our group rides hit that regularly on our out of town training circuits.)

Dave...what was the impact on the battery range?

Hi Dave, is the ghost still ok ? Many thanks Kev

Hi Dave ,it does not work on my SLe any ideas .Tony

Surely the Mahle is a view of what the mahle thinks it’s doing so it doesn’t cut out?

Hi Dave. Is it still working okay or has it caused any other problems?

Very good.

you've sussed it dave 😉 not cheap like😢 don't forget to tell your insurance company 😂😂

Ok for tracks ,illegal on public roads.