Hi, i'm buying a spanish bottom bracket and i don't know if i need a 19mm or a 22mm, anyone else know?thanks so much
Well you cant buy a spanish bottom bracket problem solved. You are only able to buy the hardware and when you get the hardware for it it has to match the size of the crank arms and the spindle i am pretty sure all spanish botom brackets are the same but there are different spindle sizes for different sealed bearings
There is also a 20mm BMX crank axle, though it's not very common.
well. first you need no no what size the axel on your crank is ( if you dont know, the axel is the bar that will go through your bottom bracket and attach to your crank arms). take a ruler and either measure the diameter of your axel or the diameter of the hole through your current bottom bracket. it WILL be either 19mm or 22mm. hope this help. *you measure the diameter from one side to the oppesite