I have a redline bike and i am putting a 3 piece crank on it but i dont know which bottom bracket to use?

Question

i need to know which bottom bracket i need to get a us mid spanish or euro bottom bracket

Answer 1

What type of bike is this?  I would suggest that you go to your local bike shop.  Buying the crank and bottom bracket separately is not a good idea as the spindle has to be the correct length and the spindle end had to be compatible with the crank arms.