Here are some examples of where and what to look for: The bottom bracket where serial numbers are typically located is circled. Bike Serial numbers All bikes 1 all have unique serial numbers.įinding a bicycle serial number Most bicycles have their serial number engraved beneath their bottom bracket, but sometimes serial numbers are found in other places. We've done a few things to make it more likely that you'll find the bike you're looking for. When searching for a serial number, use our serial search bar - it's the second bar on our search form. Finding bicycles by serial number on Bike Index is a critical part of our functionality. Hopefully you can find the serial number on the bicycle you're looking at - email contact bikeindex. On older Schwinns there are numbers stamped on both the drive side and non-drive side rear dropouts the one on the non-drive side dropout is the serial number. Some BMX bikes and a few Schwinn bicycles place the serial on the rear dropout. A serial number located on a rear dropout. Some Schwinn bicycles have the unique identifying number their serial number on the head tube. Here are some examples of where and what to look for. Most bicycles have their serial number engraved beneath their bottom bracket, but sometimes serial numbers are found in other places. All bikes 1 all have unique serial numbers.