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Replacement parts
Headset spacer set for 1 1/8 inch 28.6 mm steerer
Stack-height spacers for a 1 1/8 inch fork steerer, 28.6 mm nominal, in 2.5, 5, 10 and 15 mm thicknesses so you can dial in bar height on a Canyon, Trek or Specialized without buying a bag of aluminium ones. Bore is 28.9 mm for a free slide, outer diameter is 34 mm to match most stems, and edges carry a 0.5 mm chamfer so they seat squarely. Print them flat in PETG or ASA with 4 walls and 100 percent infill; the preload is a light clamp so the material sees only compression. Open the ready-made model free, resize it on your phone or computer, then download a print-ready STL, 3MF or G-code sliced for your printer, free.Opening the ready-made model and downloading it as STL or 3MF are free, no card; AI changes use credits, from Maker at $7.99 a month.No printer? We print this part and ship it to your door. See its priceUpdated
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Adjust
Change its numbers in the viewer for free, or ask the AI in the chat: wall thickness, hole size, the thing it clips onto. AI changes use 2 credits per request (1 for a quick edit, 3 for a redesign), paid with a plan from Maker at $7.99 a month.3Print
Download a watertight STL or 3MF free, with your numbers and hand edits, or G-code sliced for your printer at the same price. After an AI change the download is included in every plan (4 credits without one).
Dimensions of the ready-made model (editable)
| Parameter | Value |
|---|---|
| inner bore diameter | 28.9 mm |
| outer diameter | 34 mm |
| chamfer size on both faces | 0.5 mm |
| engraving depth | 0.4 mm |
Example prompt
Model a set of four headset spacers with a 28.9 mm bore and 34 mm outer diameter in 2.5 mm, 5 mm, 10 mm and 15 mm heights, each with 0.5 mm chamfers on both faces and a 1 mm wide engraved height label on the outer surface.
Fit notes
Spacers for 1.25 inch (31.8 mm) or 1.5 inch (38.1 mm) steerers, or slim 32 mm outer diameters for aero stems, are rarely in a downloaded set. Type your steerer size, stem diameter and the stack you need into SpeakCAD, preview the set in the browser, adjust it in the chat, then download the STL.
Questions people ask about a headset spacer set for 1 1/8 inch 28.6 mm steerer
Stack-height spacers for a 1 1/8 inch fork steerer, 28.6 mm nominal, in 2.5, 5, 10 and 15 mm thicknesses so you can dial in bar height on a Canyon, Trek or Specialized without buying a bag of aluminium ones. Bore is 28.9 mm for a free slide, outer diameter is 34 mm to match most stems, and edges carry a 0.5 mm chamfer so they seat squarely. Print them flat in PETG or ASA with 4 walls and 100 percent infill; the preload is a light clamp so the material sees only compression.
Click Open it free on this page and create a free account (no card): the ready-made model opens in your browser, on your phone or computer, nothing to install. Change its numbers in the viewer for free and download a watertight STL or 3MF free, or G-code sliced for your printer at the same price. An AI change in the chat uses 2 credits per request (3 for a redesign), and the download after it is included in every plan (4 credits without one). Start with Maker: 50 credits a month for $7.99, cancel anytime.
On this page: open the ready-made model free in a SpeakCAD account (no card), change any dimension in the viewer, then download the STL or 3MF free, or G-code sliced for your printer at the same price.
A shared STL is modelled for someone else's measurements. Here you open the ready-made model free, change it to your measurements in the viewer, then download a file sized for the part you actually own, free as STL or 3MF.
Yes. SpeakCAD slices the part on its servers with OrcaSlicer and your printer's official profile (380+ printers, including Bambu Lab, Prusa, Creality and Elegoo), and you download the G-code (a sliced .gcode.3mf for Bambu Lab printers). G-code sliced for your printer costs the same as the STL: included in every plan, free for a part you shaped by hand, 4 credits without a plan for a part with AI work in it. Pick your printer on the printers page to see its profile.
No. SpeakCAD runs in the browser on your phone or computer: the chat, the 3D engine and the live viewer load in the tab. The only file you download is the finished STL, 3MF or sliced G-code.
Print it your way
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