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Seatpost Clamp

julio 22, 2026

VIntage Xcaliber BMX Seatpost Clamp 25.4mm Blue Alloy 80s OG X-Caliber Collar

VIntage Xcaliber BMX Seatpost Clamp 25.4mm Blue Alloy 80s OG X-Caliber Collar Brand: Xcaliber Item: BMX bicycle seatpost clamp / collar for 25.4 mm applications, finished in blue anodized alloy with a single side pinch bolt. Actual Measurements: Sized for 25.4 mm applications per gauge image, weight: 35 g on digital scale. HTF Xcaliber clamp with OG hardware. Decal might be original.
julio 22, 2026

Promax FC-1 Seatpost Clamp – 31.8mm

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julio 22, 2026

Dia-Compe MX hinged BMX bicycle seat clamp – 28.6mm (1 1/8″) DARK BLUE

Dia-Compe's popular hinged MX seat clamp from the early 1980's now available in 28.6mm size. These are BRAND NEW - they are not NOS * Color: DARK BLUE * Size: 28.6mm (1 1/8") inner diameter (fits most frames that take a 25.4mm (1") seat post, but as always, measure the outer diameter of the seat mast tubing of your frame or the inner diameter of your existing seat * Material: Aluminum alloy * The "MX" is stamped - the "Dia-Compe 28.6" on the top edge is laser engraved.