SEAT POST SHIM 27.2MM TO 25.4MM - SILVER $5.95 Quantity discounts available QuantityPrice SKU: 06-SPOST-SHIM MSRP: $5.95 This item is IN STOCK Quantity -+ Add to Cart Details SEAT POST SHIM - ALUMINUMFits in any frame designed for 27.2mm posts and reduces to 25.4mm. Shim is 3" long and is slotted to allow seat clamp to tigh... Details Back DetailsSEAT POST SHIM - ALUMINUMFits in any frame designed for 27.2mm posts and reduces to 25.4mm. Shim is 3" long and is slotted to allow seat clamp to tighten.