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Quick Overview Replacement/Spare Part – Oversize Saddle Rail Clamp For Saddles With Oversize Rails: - Serfas® EX-RX, EX-RXL - Serfas® BMX-100, CRS-1 - Fits 8mm Rail Thickness - Sold In Dealer Packaging

Serfas Seat Clamp fits all Serfas' seats with standard rails. It's compatible with 7/8-inch diameter seatposts.