Zoom Q-2 Quill Stem Adaptor - 1 inch Fork to 1-1/8 inch Threadless

Zoom Q-2 Quill Stem Adaptor - 1 inch Fork to 1-1/8 inch Threadless

Zoom Q-2 Quill Stem Adaptor - 1 inch Fork to 1-1/8 inch Threadless

What does the Zoom Q-2 Quill Stem Adaptor do?

The Zoom Q-2 Quill Stem Adaptor lets you run a modern 1-1/8 inch threadless stem on an older 1 inch threaded fork, so you can upgrade your cockpit without replacing the fork. It drops into the threaded steerer like a quill stem, with a 22.2mm quill that fits 1 inch forks, then presents a standard 28.6mm threadless clamp up top for your new stem. This is the simple fix for vintage road bikes, commuters, and restorations where you want the wider stem selection and clean look of a threadless setup.

Built from cold-forged aluminum for strength, the Q-2 also gives you a 23mm height adjustment range, so you can fine-tune bar height as you dial in fit. It is a practical, affordable bridge between old and new standards, ideal for anyone modernizing a threaded-fork bike or sourcing a hard-to-find conversion part. Install it once and your bike gains access to the entire world of threadless stems.

$19.00
$19.00
Shipping calculated at checkout.

1 in stock

  • Orders over $100 ship free!
  • Estimated delivery: Jun 08 - Jun 12

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Specifications

  • Model: Q-2
  • Function: Quill stem adaptor, threaded to threadless
  • Fork Compatibility: 1 inch threaded (22.2mm quill insertion)
  • Stem Clamp: 1-1/8 inch threadless (28.6mm OD)
  • Height Adjustment: 23mm
  • Material: Cold-forged aluminum
  • MPN: Q-2

FAQ

What does this adaptor convert?

It converts a 1 inch threaded fork into a 1-1/8 inch threadless stem clamp. The 22.2mm quill inserts into the 1 inch threaded steerer, and the top provides a 28.6mm clamp for a standard threadless stem.

What stem size does it take?

It accepts any standard 1-1/8 inch (28.6mm) threadless stem, which is the most common modern stem size.

Can I adjust the height?

Yes. The Q-2 allows a 23mm height adjustment range so you can raise or lower the bars to fine-tune your fit.

What is it made of?

It is cold-forged aluminum, chosen for strength in a lightweight package.

Best For

Riders with a 1 inch threaded fork who want to fit a modern 1-1/8 inch threadless stem, including vintage road bike restorations, commuter and city builds, and anyone modernizing an older cockpit without swapping the fork.

Zoom Q-2 Quill Stem Adaptor - 1 inch Fork to 1-1/8 inch Threadless Reviews:

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