This is a paddle shifter system for 280 mm and larger diameter steering wheels with 70 mm bolt mounting pattern. This design can be built with only shifters or shifters + buttons, wired or wireless via BT.
The complete shifter consists of two shifter assemblies and a base plate. The shifter unit and paddle hinge should be 3D printed. Paddle and steering wheel mount plate can be printed, but I recommend laser cutting or CNC milling for maximum rigidity.
The shifter has a nice and well defined click. It is magnetically returned, and it uses a micro switch. It mounts to the back side of any steering wheel with standard 70 mm bolt pattern.
YouTube video showing paddle shifter operation: https://www.youtube.com/watch?v=Pz5LogKsN7o
BOM:
Notes: The parts are not in optimal print orientation. Rotate them before printing. Some nut holes are closed with 0,2 mm thick extrude to improve print quality, use a small drill or a file to open them after printing. The shifter paddle in real world pictures is different from the one that is available for download.
Update 1: Added a shifter mount plate with buttons. It accepts buttons with 12 mm mounting hole diameter. I used buttons with 16 mm housing outer diameter.
Update 2: Added shifter mount plate /w buttons version 2. The buttons are arranged further away from wheel center. This version also comes as a variant, that has mounting holes for wireless hardware & two status indicator leds
Update 3: Added wireless instructions, wireless base station enclosure and F1 style paddles
Update 4: Added a stronger paddle hinge to fix the small flex in the paddle. Print hinge with high infill. PLA, PETT or PETG recommended.
| base_enclosure_bottom.STL | 198.7KB | |
| base_enclosure_top.STL | 326.4KB | |
| f1_paddle.DXF | 25.5KB | |
| f1_paddle.STL | 168.8KB | |
| f1_paddle_short.DXF | 24.9KB | |
| f1_paddle_short.STL | 62.2KB | |
| paddle.DXF | 20.0KB | |
| paddle.STL | 42.5KB | |
| paddle_hinge.STL | 124.7KB | |
| paddle_hinge_v2.STL | 145.1KB | |
| paddle_mount_plate.DXF | 23.8KB | |
| paddle_mount_plate.STL | 104.2KB | |
| paddle_mount_plate_buttonvariant1.DXF | 36.3KB | |
| paddle_mount_plate_buttonvariant1.STL | 354.2KB | |
| paddle_mount_plate_buttonvariant2.DXF | 36.1KB | |
| paddle_mount_plate_buttonvariant2.STL | 352.6KB | |
| paddle_mount_plate_buttonvariant2_wireless.DXF | 40.2KB | |
| paddle_mount_plate_buttonvariant2_wireless.STL | 460.0KB | |
| paddle_offset.DXF | 25.7KB | |
| paddle_offset.STL | 80.9KB | |
| paddle_offset_long.DXF | 25.9KB | |
| paddle_offset_long.STL | 91.9KB | |
| shifter_unit_btm.STL | 699.6KB | |
| shifter_unit_switch_stop_plate.STL | 316.3KB | |
| shifter_unit_top.STL | 315.8KB |
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