VIVI Bike Quill Stem Adapter Threadless Quill Converter

Overview

A quiet metallic shift under your palm turns a vintage quill into a modern threadless steering column. The VIVI Bike Quill Stem Adapter Threadless Quill Converter lets riders preserve classic frames while adding the fit, stability and accessory compatibility of contemporary cockpits.

Product details

Precision-machined from lightweight alloy, this converter slips into the existing quill, expands securely and accepts standard threadless stems and accessories. Ideal for electric bike conversions and e-bike riders who need to mount displays, throttles, lights or phone holders without replacing the original stem or cutting the fork steerer.

Benefits in use

Maintain frame aesthetics, simplify upgrades, and get a firmer, more stable front end for heavier e-bike setups. Installation is straightforward with common tools and allows reversible restoration if you return to a quill setup later.

• Lightweight aluminum construction for strength and minimal added weight
• Secure wedge-expander design for firm, rattle-free hold
• Compatible with most quill stems and standard threadless stems
• Easy install and reversible — no cutting of the steerer required
• Ideal for mounting e-bike displays, throttles, lights and accessories