The 1000w to 1500w motors are great but you need to use a freewheel with them that means also you loose reverse if you use them you cannot use it non-freewheel . And regen breaking just locks wheels up ! too powerfull the motor cog is normally Motorcycle up 420 chain ....if you look at data figures for that motor you have to divid motor RPM by 5. I think on that range but you also Multiply Nm. by 5 ..could do with seperate gearbox with them single varible speed .. just does not feel right they can just take off till speed.. and the you think need gearbox ....i have used 350 and 500w (430c too)... 1000 to 1500w you can go up mountains with that... varible drives are great on the flats but up montains they soon have burnt blue rubber smoke !
Yes the 800w 1100 rpm would be more practical direct drive Nm not so high ! ,,,,,have idea 2x 800w the exceleration gear with freewheel and the other for high speed you can use both motors for exceleration and when you get to exceration motor run out speed your high speed one is all ready running ,, and will go on till it balances load and motor . and you can have regen braking too!
What kind of tricycle ! and size and load ?