30.4 Seat Post Shim
Genuine Surface 604 Part · In Stock & Ready to Ship · 1-Year Parts Warranty · Easy Self-Install
Seat post shim adapter from 27.2mm to 30.4mm for Surface 604 eBikes. This thin aluminum sleeve fits inside the frame's seat tube, allowing a standard 27.2mm seat post to fit securely in the larger 30.4mm seat tube.
Required when using the stock Surface 604 seat post or aftermarket 27.2mm posts. A simple but essential adapter.
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