Old school BMX quill stem "stiffener" - known as a stem stiffener or flex fighter, this machined aluminum sleeve fits on your 21.1mm diameter BMX stem quill. Just tighten your stem wedge with this sandwiched tightly between your stem and headset locknut and you will minimize flex in your stem quill.
Color: BLUE
Material: Aluminum
Height: 29.2mm (just shy of 1 3/16")
Fits quill size: 21.1mm
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