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UPANBIKE 50-021 Adjustable Seatpost-Mounted Rear Bike Rack

$20.99 (Price correct as of 11/13/2026 10:30 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.)

The black UPANBIKE 50-021 is an aluminum-alloy rear bike rack that mounts to the seatpost. Its length adjusts from 13.8 to 19.7 inches, and its stated maximum load is 22 lb. Check that the seatpost is under 33.3 mm in diameter and confirm the rack clears the specific bicycle.

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SKU: B01EHNDHJ6 Category:

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Quick Summary

The UPANBIKE 50-021 is a black aluminum-alloy rear bike rack that mounts to the seatpost. Its length adjusts from 13.8 to 19.7 inches, and its stated maximum load is 22 lb.

Key Details

Detail Product information and buyer relevance
Mounting Seatpost-mounted; the stated fit limit is a seatpost diameter under 33.3 mm.
Adjustable length 13.8 to 19.7 inches, adjusted with screws under the rack.
Maximum load 22 lb. Keep the carried load within this stated limit.
Material and color Aluminum alloy; black.
Model and quantity Model 50-021; one item.

Compatibility, Size and Fit

Check the seatpost diameter before choosing this rack: the stated limit is under 33.3 mm. Although it is described as fitting most bikes, including mountain and road bikes, that broad claim does not establish fit on every bicycle. Check the mounting position and clearance on the specific bike.

What to Compare Before Buying

  • Seatpost diameter: Check that the bicycle’s seatpost is below the stated 33.3 mm limit.
  • Length: Compare the adjustable 13.8 to 19.7 inch range with the space available on the bicycle.
  • Load: Keep the expected carried weight within the 22 lb maximum.

Before You Decide

Confirm the seatpost measurement, available clearance, desired rack length and expected load. Follow the product’s installation instructions.

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