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Adaptador de tija de sillín para bicicleta de montaña, espaciador de cuña, tamaño de diámetro, pin de cambio de asiento 25,4, 27,2, 30,0, 30,4, 30,8, 28,6, 30,9, 31,6mm|seat post shim|bicycle seatpostseat post - AliExpress
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