Hello everyone nice to be on the forums I want to take a large motor and put it in the hub of an mtb frame that is already designed to have an internal battery in it. The battery should be high capacity due to the large motor. The woods around here are quite flat and most of this island i live on for that matter so i want to make it single speed but with a very high gear so i can still reach some good speeds. I am used to single speed bikes and i always gear them high so i don't mind the the extra effort i need to get the bike going. So if i took a motor like this one:
m-eur.vevor.com
Could i then buy an e-mtb frame with or without the battery and then connect the motor to the battery using a single Speed gear ?

VEVOR 1800W elektrisk børsteløs DC-motorsæt 48V højhastigheds børsteløs motor med 38A hastighedskontrol og gaspedal ledningssæt til elektrisk scooter Go Kart E-cykel | VEVOR DAN
Opdag VEVOR 1800W elektrisk børsteløs DC-motorsæt 48V højhastigheds børsteløs motor med 38A hastighedskontrol og gaspedal ledningssæt til elektrisk scooter Go Kart E-cykel, Ren kobbermotor og 4500 RPM høj hastighed til laveste pris, 2 dages levering, 30 dages retur.
Could i then buy an e-mtb frame with or without the battery and then connect the motor to the battery using a single Speed gear ?