Originally Posted by
FBinNY
Assuming you do in fact have a French - 35x1- bottom bracket, than you need to replace it with a 35x1 BB. But not all bikes made in France have French thread BBs. It's entirely possible that your bike has an ISO BB, especially if it's of fairly recent production, so I suggest that you start out by verifying what's in there right now.
+147 French bikes at one time came with French bottom brackets, then Swiss bottom brackets, then british bottom brackets. All of them are different, none are compatible with the other, far too little information to know which one you have. But since you have the bike in hand, just go to a bike shop and they can help. Note, if you happen to have a Swiss bottom bracket, options are quite limited, but its doable.