If you can’t find a serial number, you can still register your bicycle with DPS.
The diagram (below) indicates five of the most common serial number locations. If there is no serial number near the cranks, you should check other common places including the front headset or rear stays. Here are some examples of where and what to look for.
RALEIGH BICYCLES SERIAL NUMBERS SERIAL NUMBERS
Finding a bicycle serial number Most bicycles have their serial number engraved beneath their bottom bracket, but sometimes serial numbers are found in other places. Bike Serial numbers All bikes 1 all have unique serial numbers.