building battery for 48v 1000w

Looking for a battery for this rear tire.
https://tinyurl.com/yap7dcvy.

I was thinking 4 of these https://tinyurl.com/y92jutuc

would this work?
which BMS would I need?
If anyone knows any other lipo/ lithium ion, would be gladly appreciated. Stuck one waiting 30 days for ali express premade.

These are lipo and are best left for the experts, as you can easily burn your house down if they are mishandled. Treat them nicely and you will get years of excellent trouble free service from them. Never store or charge them (or any other lithium battery) in a place where you wouldn't have a bonfire.

See https://endless-sphere.com/forums/viewtopic.php?f=14&t=52240 and read up until you have a thorough understanding.

two 4s and one 6s can be connected in series for ~52V nominal, else you can do 2x6s for ~44V nominal. 20Ah will give you quite a nice range. These are not typically used with a BMS; they are balance charged manually, which is quite a bit of work and upkeep. A few members here have some tricks for reducing the amount of time required to charge them and keep them in good balance. Personally, I don`t have a lot of free time for nursing batteries and I stick with 18650 cans (though they also need to be treated carefully), as they can be bulk charged through a BMS and work well enough for my applications.