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UPANBIKE 25.4 mm Bike Seatpost, 450 mm, Micro-Adjust Clamp

$22.99 (Price correct as of 11/13/2026 00:05 PST · Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product.)

UPANBIKE model BL128-0AMUS is a black, 450 mm (17.7 in) bicycle seatpost with a stated 25.4 mm frame fit and a clamp adjustable for saddle tilt. The listing notes that a post marked 25.4 mm may measure about 25.0-25.2 mm. Check your frame’s required diameter and fit requirements before selecting a replacement; the broad fit claim does not confirm compatibility with every bicycle.

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SKU: B08P4MKK6G Category:

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Quick Summary

The UPANBIKE BL128-0AMUS is a black bicycle seatpost measuring 450 mm (17.7 in) long. It is listed for a 25.4 mm frame seatpost opening and has a clamp adjustable for saddle tilt.

Key Details

Detail Product information and buyer relevance
Model BL128-0AMUS, from UPANBIKE.
Length 450 mm (17.7 in); compare with the length and insertion requirements for your frame.
Stated frame fit 25.4 mm. The listing notes that a post marked 25.4 mm may measure about 25.0-25.2 mm.
Clamp Adjustable for saddle tilt.
Color and quantity Black; listed as one item.

What to Compare Before Buying

  • Check the seatpost diameter required by your frame. The stated size and the listing’s measurement note make it important to confirm the actual fit rather than rely on a broad fit claim.
  • Compare the 450 mm length with your bike’s seatpost requirements and the position you need. Confirm the permitted insertion and adjustment details for your frame.
  • Check that the clamp arrangement suits your saddle and that its tilt adjustment meets your needs.

Compatibility, Size and Fit

The listing describes this as a replacement post for most bikes, but that wording does not establish fit for every frame. Confirm the exact required diameter and length for your bicycle before selecting it.

Before You Decide

Confirm the frame’s required seatpost diameter, the needed post length and the saddle-clamp fit. Follow the bicycle and component instructions for installation.

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