I have a Greenline XG-7000 Aluminum 700c Fixed Gear Flip Flop Hub 54cm Racing Bike
I dont like the crankset it came with so I found a FSA 52T chainring that I could use, the question I have is what CRANKSET/BOTTOM BRACKET could I use with the chainring?

https://www.bikesonline.com/fsa-pro-t...g-1-2-x1-8.htm

You can use any 144bcd crankset (it says 144 in the link). Get a BB with the spindle length recommended for the crank you want.

Why do you want a 52t chainring? Why are you looking at chainrings before even knowing what crank you want?

well the important thing is to match up the 144 bdc of the fsa chainring.

but most people including myself will tell you that's it's not worth changing anything on that bike.

also, 52 teeth seems like a lot depending the size of your cog.

well the bike came with a 52 Tooth crankset, I love the speed from the 52, I'm not a trick rider...also the cranks it came with are junk, thats why I am replacing them

I cant find any cranksets that come in a 52T most are 46-48 I rode a friends bike with the 48's and hated it

What size is your cog?

my bike