Bicycle Seatpost Seat Pole Shim Adapter Sleeve Seat Tube Reducer Converter for Bikes

❗read me before u buy ❗For example: 27.2 convert to 28.6mm (Seat post 27.2mm, after adding our converter, it becomes 28.6mm so as to fit into bikes with 28.6mm seat post hole) Aluminium Light weight yet strongPlus Minus 0.1mm is fine, they are designed to tolerate.In the current bicycle market 30.8 is the same as 30.9, 33.9 is the same as 34 and etc (these are commonly interchangeable.All are Length 140mm 🎨 Variant:27.2 convert to 28.6 (Seat post 27.2mm, after adding our converter, it becomes 28.6mm so as to fit into bikes with 28.6mm seat post hole)27.2 convert to 30.027.2 convert to 30.427.2 convert to 30.927.2 convert to 31.627.2 convert to 33.931.6 convert to 33.9Seat post sleeve protector