Abstract: An adjustable securement ring to secure a bicycle pump on a bicycle having a securing element and a retarding element. The securing element has a retaining body which has a cone-shaped protrusion for sustaining a distal end of the pump. An elongate strip protrudes from the bottom end of the retaining body and make a loop to go back through a channel provided on the lower portion of the retaining body. A plurality of protuberances are provided on the outer surface of the elongate strip along its length. The retarding element has upper and lower plates which are connected to each other by a connector. A tenon provided on the lower surface of the upper plate prevents the escape of the retarding element from the retaining body and lugs provided on the lower surface of the lower plate to retain the protuberances in the channel when the retarding element lodges in the securing element.