The bicycle was taken between 10.20 and 10.30 on Thursday 6 March from outside the restaurant at Anglia Retail Park.
Ipswich Police shared the appeal on social media, asking anyone with information to come forward.
Officers have assigned the crime reference number 37/12273/25 to the case.
Anyone who witnessed the theft or has information about the stolen blue Boardman mountain bike is asked to contact police via their online reporting system at https://orlo.uk/2zoxs or by calling 101, quoting the crime reference number.
