Custom floating wheel center caps for 3D printing.
Float My Caps lets you configure a wheel center cap from your own measurements. Explore the moving assembly in 3D, adjust its fit, and prepare a custom STL configuration for your 3D printer. Wheel center caps are also called wheel centre caps or hub center caps; this design covers the center of the wheel, not the whole wheel like a full-size hubcap.
How does a floating wheel cap work?
The mounting base turns with the wheel. Bearings let the front face rotate independently, while an offset counterweight helps the face return toward an upright position. Bearing friction and bumps can make it wobble before it settles. The animation demonstrates the intended mechanism; it is not a physical performance test.
Three measurements define the wheel fit
Use calipers on an existing cap that fits your wheel. Measure several points. The wheel brand or wheel diameter alone cannot establish these dimensions.
- 1. Face width — outside diameter
- Measure across the widest circular front edge. The configurator supports 50–90 mm faces, subject to the other fit constraints. Check the recess in the wheel as well.
- 2. Back clip width — retaining diameter
- Measure across opposite retaining bumps without squeezing the clips. This is different from the diameter at the roots of the clips and from the front face width.
- 3. Retention depth — seating surface to shoulder
- Measure from the underside that seats against the wheel to the cap-facing shoulder of the retaining bump. Do not include the insertion ramp or use the full clip length.
Advanced controls let you refine clip-root diameter, clip thickness, lead-in ramp height and front thickness. The generator checks combined limits and reports automatic adjustments. Space behind the wheel face must also accommodate the bearing support and counterweight throughout a full turn.
Custom STL files with fixed hardware
The export contains five STL components, dimensions and a validation report. The printable parts include the mounting base, floating plate with shaft, rounded top cover, counterweight and spacer. Two dummy bearings shown in the assembly are excluded from the print files.
The mechanism uses two bearings measuring 14 mm outside diameter × 8 mm bore × 4 mm width. The spacer measures 10.4 mm outside diameter × 8.4 mm bore × 5 mm length. These hardware dimensions stay fixed as the cap is resized. Import the files in millimetres and keep global slicer scaling at 100%.
Questions before printing
Will a 50 mm or 56 mm cap fit my BMW or another car?
Not from the face diameter alone. Wheel designs, retaining lips and available depth vary, including between wheels fitted to the same car model. Measure all three fit dimensions and the available space. The generator has no verified vehicle-specific fitment presets.
Am I ordering a physical cap?
No. This is a digital-file service. Printed parts and bearings are not supplied. Personal and commercial licenses are described in the terms; checkout availability and the current price appear in the studio.
Has the design been physically validated?
Physical fit and operation are not yet validated. Geometry checks can detect certain mesh and clearance problems, but do not certify printed strength, wheel retention or road use. Print testing is needed for your wheel, material and printer.
What should I check after printing?
Check dimensions, bearing fit, free movement and secure wheel retention. Inspect the full assembly for interference. Follow the measurement, printing and fit-testing guide before using a printed cap.