Hi. I am rebuilding a Motobecane Mixte for my girlfriend. I have been trying to find a replacement for the original seat post bolt and am having trouble. I would like to use one the same style as the one in the attached photo.

The ones my local bike shop have in stock are too thick in diameter.

Does anyone know what size I should be looking for? I will have to order on-line since none of the local shops can help me so I would like to know the proper size. It seems like they are available in 10mm and 8mm maybe i need 8mm?

Let me know what you think.


Thanks,



chris