What cranks fit to eg Bosch motors

[AndyBike]

Always they seem to have a crank fitted and listed as specifically an E-crank(whatever that is)
And I wondered what the interface is and if you can put on your favourite crank, rather than stock. Ive a number of nice cranks maybe lighter or such and can I fit them or have they introduced a new system and unless its E compatible you cant fit anything else.

For example can I fit some Hope cranks or some Rotor cranks to the motor crank studs.

 

[Nealh]

Bosch use ISIS spline as do Yamaha & Brose.

 

[Gringo]

Not all Bosch cranks are the same.
I had a bike with a the original active line motor (2014) I’d shortened the crank arms and I brought some cheap isis arms for when I sold it.
I kept the shortened arms for my next bike (2018 active line plus) but found that the 2014 ISIS arms didn’t fit the 2018 motor

 

[AndyBike]

Thasnks to the both of you.
@Gringo. Good point, ill wait till i get them and measure up. Ive some sram too should be from about 2015 or 16, and was thinking be the same, but good I checked