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Adapters & couplers
Thule roof rack T-track adapter for bike carrier
Thule WingBar and WingBar Evo bars have a 20 x 20 mm T-track along the top, and older bike carriers, ski racks or DIY kayak saddles that clamp around a square bar cannot use it. This adapter is a 60 mm long T-slot nut 20 mm wide and 6 mm thick at the foot with a 12 mm neck, topped by a 60 x 40 mm plate with two M6 threaded holes on 30 mm centres for your accessory. Print it foot-down in PETG or nylon at 60 percent infill, and keep loads modest; use steel bolts and a safety strap for anything that leaves the car. 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).
Example prompt
Design a T-track adapter for a 20 x 20 mm roof bar slot with a 60 mm long foot 20 mm wide and 6 mm thick, a 12 mm wide neck, a 60 x 40 x 8 mm top plate with two 5 mm holes tapped for M6 on 30 mm centres and 1 mm chamfers.
Fit notes
T-track widths differ between Thule, Yakima and Kuat bars, so a generic nut rocks or jams. Measure your track, tell SpeakCAD the slot dimensions and the bolt pattern of your carrier, preview the adapter in the browser, refine it in the chat, then download the STL.
Questions people ask about a Thule roof rack T-track adapter for bike carrier
Thule WingBar and WingBar Evo bars have a 20 x 20 mm T-track along the top, and older bike carriers, ski racks or DIY kayak saddles that clamp around a square bar cannot use it. This adapter is a 60 mm long T-slot nut 20 mm wide and 6 mm thick at the foot with a 12 mm neck, topped by a 60 x 40 mm plate with two M6 threaded holes on 30 mm centres for your accessory. Print it foot-down in PETG or nylon at 60 percent infill, and keep loads modest; use steel bolts and a safety strap for anything that leaves the car.
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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