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Brackets & mounts
Garmin Edge 540 low profile stem cap mount
A stem cap mount replaces the top cap on a 1 1/8 inch steerer and puts a Garmin Edge 540 or 840 directly above the stem, the tidiest position for a commuter, gravel or Brompton-style bike where an out-front arm would get knocked. The 32 mm disc is 6 mm thick with a countersunk hole for the standard M6 top cap bolt, and the quarter-turn socket on top matches Garmin's four-tab layout with 0.2 mm clearance so the unit clicks in firmly. Print it socket-side up in PETG at 0.2 mm layers; the flat underside needs no supports. 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 |
|---|---|
| cap diameter | 32 mm |
| cap thickness | 6 mm |
| M6 clearance hole | 6.5 mm |
| countersink top diameter | 12 |
| countersink depth | 3 |
| boss outer diameter | 20 mm |
| boss height above cap | 12 mm |
| wall thickness | 2.5 mm |
| tab height (vertical extent) | 4 mm |
| radial protrusion of tab | 2.5 mm |
| angular clearance shaved per side | 0.2 mm |
Example prompt
Create a bicycle stem top cap 32 mm in diameter and 6 mm thick with a countersunk 6.5 mm centre hole for an M6 bolt and a Garmin quarter-turn socket on top with four tabs, 12 mm tall, 0.2 mm tab clearance and 2.5 mm walls.
Fit notes
Because the socket height and disc diameter come from your stem rather than a random model, the computer sits level and does not foul the bar. Type your steerer size and desired tilt into SpeakCAD, preview the cap in the browser, tweak the socket angle in the chat, then download the STL.
Questions people ask about a Garmin Edge 540 low profile stem cap mount
A stem cap mount replaces the top cap on a 1 1/8 inch steerer and puts a Garmin Edge 540 or 840 directly above the stem, the tidiest position for a commuter, gravel or Brompton-style bike where an out-front arm would get knocked. The 32 mm disc is 6 mm thick with a countersunk hole for the standard M6 top cap bolt, and the quarter-turn socket on top matches Garmin's four-tab layout with 0.2 mm clearance so the unit clicks in firmly. Print it socket-side up in PETG at 0.2 mm layers; the flat underside needs no supports.
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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