Located on a small white sticker on the down tube between the pedal area or by turning the bike upside down
and looking on the crank housing between the pedal area (all model numbers start with a number 8).
Located on the same small white sticker as the model number or by turning the bike upside down and looking on the crank housing between the pedal area (yyyy.mm.dd).
Located by turning the bike upside down, there will be a number engraved on the crank housing between the pedal area.
Located on your purchase receipt or if bicycle was a gift, provide date you received the bicycle.