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Not even close to a ferrari, more like a vette I owned an Opal GT as my first car, best steering feedback of any car I have ever owned.

Your description and ultimate diagnosis dont seem to add up. 1.) You describe a grinding that only occurs when on throttle or PAS. Since its a hub drive which puts no load on the drivetrain (crank/chain/cassette), it most certainly sounds like a motor issue. My neighbor has a core 5 and the...

Your correct in that its hard to find TMM4 info that talks about a candence sensor. That being said, it can be seen clearly in their own pic (the square nub thingy) https://surface604bikes.com/products/2020-torque-sensor Looks identical to the Juiced (look at both pics)...

I just use the incredibell, simple and cheap, I have tried several different types but other people are just too hard to predict. https://mirrycle.com/item/original-incredibell/ There is no simple solution to this as every trail user is unique and there is no magic formula. Nothing works 100%...

While not a Ripcurrent S , I have found a 42t front chainring for all my ebikes capable of 28mph speeds (including Juiced CCX), coupled with a 11-36t 9-speed Shimano HG-400 cassette to be a good compromise of speed and hill climbing ability. I used bikecalc and a cadence of 90rpm at...

A bad side effect of these is measuring the cadence off the rear cog. In doing so, you get variable cadence depending on what gear you use. If one then uses cadence as a basis for determining human power and then uses this to determine assist, you effectively have assist which can vary...

If you really want to see how its done, the TSDZ2 open source code would be a good start. https://github.com/OpenSourceEBike/TSDZ2-Smart-EBike I played with this code awhile back trying several things. Ultimately I abandoned the TSDZ2 due to it being a POS. In a nutshell, this code determines...