South Salem Cycleworks: Salem, Oregon
(503) 480-2001
email: sscycleworks@comcast.net
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Components - Quill fork to threadless stem adapter

On this page: Quill fork to threadless stem adapter: Origin8 1" quill to 1 1/8" threadless adapter | Delta 1" or 1 1/8" quill to 1 1/8" threadless adapter | Rockwerks 1" quill to 1 1/8" threadless adapter

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These convert a threaded quill setup to threadless.


Origin8 1" quill adapter to 1 1/8" threadless stem. New, $35.00

Part# 31017

  • Made for a 1" (22.2mm) internal diameter fork and a 1 1/8" (28.6mm) threadless stem.
  • Available in both black and silver. Pictures of both colors are below.

Origin 8 Quill Adapter

Here's a silver one. Mount this like a regular quill stem and you can use your threadless stem.

Quill adapter

And here's a black one.


Delta 1" or 1 1/8" quill adapter to 1 1/8" threadless stem. New, $35.00/each

Part# 31233

Delta adapter

The adapter will work on 1" steering tubes or with the sleeve on the right, on 1 1/8" steering tubes.

Delta threadless stem adapter

With the sleeve and ready for a 1 1/8" steering tube.

Threadless stem adapter

Looking at the top of the adapter and the allen bolt that tightens the adapter to the steering tube.


Rockwerks 1" quill adapter to 1 1/8" threadless stem. New , $25.00/each

Part# 31016

Rockwerk Threadless adapter

It's neat that someone came up with this solution to putting a threadless stem on a bike made for a quill stem.

Rockwerks stem adapter

Here it is rotated a bit.

Rockwerks adapter

And from the top.