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No read that thread. They sent me here!

Not helpful....

Hello, I have issues with the Bosch powertrain on my Trek Allant 8s. The assist cutoff on my model Is 28 mph. It worked perfectly for a while but over the last few days I've been struggling to get above 25mph. I noticed the speedometer becomes very erratic around that speed (will display say 29...

OK thanks will do!

Thanks for the input but again, the issue isn't that there is a speed limit on the assist, we're fully aware of that. The problem is that when we get close to that limit, the speedometer becomes erratic, like 7-10 kph up and down a few times each second. IE at 40kph, the speedometer will show...

I'm having the same issue Wakasacho. Im thinking (hoping?) it might be caused by dirty speedometer sensors. Did you figure it out? BTW, retinedNH, you have "no doubt" that the speed drops from 45 to 35 instantly because we reach top speed? Can you imagine how dangerous that would be!? Jesus.