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Tools & jigs
Bicycle chain wear indicator checker tool
A go/no-go chain checker for Shimano, SRAM and KMC chains that measures elongation over ten links (127 mm nominal). Two hooked ends drop between rollers: one side reads 0.5 percent wear (0.635 mm over the span) for 11 and 12 speed chains, the other 0.75 percent (0.95 mm) for 8 to 10 speed. The tool is 8 mm thick with 3 mm hooks that fit between 7.7 mm rollers, labelled in raised text, and prints flat in PETG with a 0.1 mm first layer so the reference edges are crisp. 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 |
|---|---|
| overall length | 140 mm |
| overall width | 20 mm |
| overall thickness | 8 mm |
| chain roller diameter | 7.7 mm |
| hook tab width | 3 mm |
| length of hook tab sticking beyond body | 10 mm |
| 0.5% wear span | 127.635 mm |
| 0.75% wear span | 127.95 mm |
| body corner fillet | 2 mm |
Example prompt
Create a bicycle chain wear checker 140 mm long, 20 mm wide and 8 mm thick with two 3 mm wide hooks on each end sized for 7.7 mm rollers, one end spanning 127.635 mm for 0.5 percent wear and the other 127.95 mm for 0.75 percent, with raised labels.
Fit notes
A measured generator makes the 0.6 and 0.9 mm offsets exactly rather than relying on a file drawn in inches by someone else, and lets you add a 1 percent tab for cheap chains. Ask SpeakCAD for the wear steps you want, preview the tool in the browser, adjust the hook width in the chat, then download the STL.
Questions people ask about a bicycle chain wear indicator checker tool
A go/no-go chain checker for Shimano, SRAM and KMC chains that measures elongation over ten links (127 mm nominal). Two hooked ends drop between rollers: one side reads 0.5 percent wear (0.635 mm over the span) for 11 and 12 speed chains, the other 0.75 percent (0.95 mm) for 8 to 10 speed. The tool is 8 mm thick with 3 mm hooks that fit between 7.7 mm rollers, labelled in raised text, and prints flat in PETG with a 0.1 mm first layer so the reference edges are crisp.
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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