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Black Ops 5710 4-Bolt BMX Quill Stem, 50 mm

$29.95 (Price correct as of 11/12/2026 22:17 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 Ops 5710 is a black, 4-bolt BMX quill stem with a 50 mm stem length and 0-degree angle. Its listed fit dimensions are a 21.1 mm quill diameter, 5-1/2-inch quill length and 22.2 mm handlebar clamp. Check those measurements against the fork and handlebar before selecting this single-stem item. Use appropriate installation instructions for the bicycle and stem.

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SKU: B000AO7H7K Category:

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Quick Summary

The Black Ops 5710 is a BMX quill stem with a 4-bolt handlebar clamp and a 0-degree angle. Its listed fit dimensions include a 50 mm stem length, a 21.1 mm quill diameter and a 22.2 mm bar clamp. Match these measurements to the fork and handlebar before choosing it.

Key Details

Detail Product information and buyer relevance
Model and type Black Ops 5710 BMX quill stem, part number 5710.
Stem length and angle 50 mm stem length and 0-degree stem angle.
Quill dimensions 21.1 mm diameter and 5-1/2-inch quill length. Check the fork’s required quill fit and available insertion space.
Handlebar clamp 22.2 mm bar clamp. Match this to the handlebar diameter where it is clamped.
Clamp design 4-bolt, top-down bolt design.
Construction and finish Described as alloy/steel construction; listed in black.
Quantity Listed as one item.

What to Compare Before Buying

  • Check that the fork is designed for a 21.1 mm quill and can accommodate the listed 5-1/2-inch quill length.
  • Match the 22.2 mm bar clamp to the handlebar diameter at the clamp area.
  • Compare the 50 mm length and 0-degree angle with the dimensions and position needed for the intended setup.

Compatibility, Size and Fit

This quill-style stem is intended to install into a BMX fork tube. The listed dimensions do not establish compatibility with a particular bicycle. Confirm the fork’s quill requirements and handlebar clamp diameter for the exact setup. Use appropriate installation instructions for the bicycle and stem; these dimensions are not an installation procedure.

Before You Decide

Confirm the fork accepts a 21.1 mm quill, the handlebar fits a 22.2 mm clamp, and the 50 mm length and 0-degree angle suit the intended setup.

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