Spec Explained: eg. 16X1.5-2.25 AV, E-READY Size 16 X 1.5-2.25 AV E-READY Explanation Diameter Compatible Width Valve Type (and Length) Extra thickness for extra durability and heavy load Unit Inch Inch mm ETRTO: Size ETRTO 700x20-28c, 27x1"-1-1/4" 20/28-622/630 700x28-35c, 27x1-1/8"-1-1/4" 28/35-622/630 700x30-43c, 27x1-1/8"-1-3/8" 30/43-622/630 Valve Explained: Type Name Length AV American Valve / Schrader Valve 35 mm AV48 American Valve / Schrader Valve 48 mm FV French Valve / Presta Valve 33 mm FV48 French Valve / Presta Valve 48 mm FV60 French Valve / Presta Valve 60 mm FV80 French Valve / Presta Valve 80 mm 因應產品特殊性，所有內胎一經開啟及由原包裝取出後，將不接受退貨及換貨。
