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For the most up-to-date parts, visit the GitHub project page.

Video: https://www.youtube.com/watch?v=_t0HLC2bZMU

This is a 1/28 scale RC chassis designed to be compatible with Kyosho MINI-Z body shells. Current version fits 90mm (M) wheelbase shells.

Update 8/26/20: I've released a 4WD chassis, available here. The 4WD version is optimized for drifting, while this one is better for grip racing and is cheaper to build.

Features:

Independent front suspension and hinged rear suspension
Ackermann steering geometry with 45 degree max steering angle
Uses common and cheap parts (625 bearings, M3 hardware)
Low part count and variety - only 3 different screw lengths needed; locknuts everywhere

Parts List

| Part | Quantity | Notes |\n| --- | --- | --- |\n| M3x20mm button head screw | 7 | |\n| M3x14mm button head screw | 2 | |\n| M3x10mm button head screw | 8 | |\n| M3 lock nut | 17 | |\n| 625 bearing | 4 | |\n| 130 size brushed motor, 2s compatible | 1 | |\n| SG90 micro servo | 1 | |\n| Compression spring, ~4mm OD, ~6mm length | 2 | For front suspension. Softer springs are better. Retractable pen springs cut to ~6mm can work, but are a bit stiff. |\n| Compression spring, ~4mm OD, ~20mm length | 2 | For rear suspension. Uncut retractable pen springs work for this. |\n| Venom Fly 300mah 2s battery (JST connector) | 1 | Batteries up to 45x23x16mm should fit |\n| Small brushed ESC, 2S compatible | 1 |\n| Small radio receiver | 1 | 2 channels or more, smaller than approx 34x22x13mm. Flysky GR3E works if decased. |

Print Settings

Printer:

FuseBox2R

Rafts: \n

Supports:

Resolution: \n

0.1-0.15mm

Infill:

25-30%

Notes:

Print tray1.stl at 0.15mm and tray2.stl at 0.1mm layer heights. Make sure your printer has good layer adhesion, as some parts have a small bed contact area and can warp or detach easily.

\nSupport should not be used for any of the parts. The front wheels have a cylindrical piece of built-in support on the inside of the wheel. To remove, use pliers to grip the support and pull straight out without twisting.\n

For more powerful motors, it may be necessary to print the motor mount and motor pinion in ABS or PETG.

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Fully Printed 1:28 RC Car Chassis (MINI-Z compatible)

Model files

zcar stl

zcar stl

tray2 stl

tray2 stl

zcar skp

zcar skp

tray1 stl

tray1 stl

Model origin

License

zcar
stl

zcar
stl

tray2
stl

tray2
stl

zcar
skp

zcar
skp

tray1
stl

tray1
stl