Where do you find the ceral number on a bike?

Question

where do you find the ceral number on a bicycle?

Answer 1

Right next to the serial number.

Answer 2

there should be one under the rubber handle grip.

Answer 3

under the bottom bracket shell.

That is, under the lowest point of the triangle of the frame joining the pedals, the seat and the handlebars.

The number should be etched into the frame, you might need to give it a clean.

Answer 4

Stamped on the Bottom Bracket shell