Brackets and mounts
Bicycle Frame (tube assembly)
- Bounding box
- 1004.3 × 82.2 × 421.0 mm
- Engine
- Precision B-rep
- Parameters
- 15
- Published
- August 26, 2026
Download
Free to download and use. See the terms.
The prompt
Create a parametric 3D CAD model of a bicycle frame using primitive shapes. Main dimensions: - Wheelbase length: 1040mm - Bottom bracket height: 295mm from ground - Seat tube: Cylinder, diameter 32mm, length 390mm, angled at 73 degrees from horizontal - Head tube: Cylinder, diameter 44mm, length 110mm, angled at 71 degrees from horizontal - Top tube: Cylinder, diameter 35mm, connecting top of seat tube to top of head tube - Down tube: Cylinder, diameter 40mm, connecting bottom bracket to bottom of head tube - Chainstays: Two parallel tubes, length 425mm, connecting bottom bracket to rear dropout Do not attempt to generate complex filleted welds or internal tube hollows. Use boolean union commands to merge the simple solid cylinders at their intersections. Output as a basic solid-body step file.
Parameters
| Name | Value | Range |
|---|---|---|
| Bottom bracket height | 295 mm | 250 – 320 |
| Head tube bottom X | 560 mm | 480 – 640 |
| Head tube bottom Z | 400 mm | 350 – 480 |
| Chainstay spacing | 70 mm | 50 – 90 |
| Chainstay drop (below BB) | 25 mm | 0 – 50 |
| Seat tube diameter | 32 mm | 28 – 36 |
| Seat tube length | 390 mm | 350 – 450 |
| Seat tube angle | 73 deg | 70 – 76 |
| Head tube diameter | 44 mm | 40 – 50 |
| Head tube length | 110 mm | 90 – 150 |
| Head tube angle | 71 deg | 68 – 75 |
| Top tube diameter | 35 mm | 28 – 40 |
| Down tube diameter | 40 mm | 34 – 45 |
| Chainstay diameter | 12 mm | 10 – 16 |
| Chainstay length | 425 mm | 400 – 450 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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