Q: I am looking for a beach snow fat kit for my bike, do you have e bike kit for 20×4.0 inch? 
1500w with 69 kmh? 

A: Yes. We can make.
Please click below site.
https://www.leafbike.com/products/beach-snow-fat-bike-kit/20-inch-electric-hub-motor-wheel/

@48v about 57kmh no load speed..  if work at @52v battery, a little fast..
Also, we can make the fastest winding rotor for this 1500w.. if @48v about 75kmh no load speed..

Q: Can I ask how much rpm, N.m? 
and with 95 kg load the speed?  48 or 52 v 

A: if full charged 52v battery, 95kg on flat road can reach about 50kmh

Q: 50kmh 52v with bike motor modified? 

A: it’s default bike motor, not that fastest.. 

Q: I need faster and i want to know the faster goes…. Important for me.. Now I have 750w with 52v go to 48kmh. I need more speed.

A: 75kmh

Q: With load? 60kmh? Just last question… What torque have modified motor? 
Now i have 48v battery then i upgrade 52v

A: 48v battery,ride on the flat road,still can reach about 75kmh
We made a sample,not test it on machine,very fast,very dangerous

Q: I don’t want to go at 75kmh but if i want to escape from dangerous situations i can! Please can you tell me the torque of bike motor? If a have problem with Uphill roads? If a lose more power or not.. 

A: all of our 48v 1000w,1500w are easy to uphill.. more than 30Nm

Q: I need your kit, 1500w bike motor modified.
Kit for 20×4” inch can i choose to use 48 or 52 v 
It’s important for me to have the modified bike motor motor, i need to have 55-60 kmh with load.