Yahboom Mini Wheeled Robot Car Chassis Kit
Aluminum alloy chassis, 14.2 cm width; kit includes 4× 310 motors, 4 rubber tires; many expansion mounting holes; 3D model files provided

Self-balancing Robot Car Chassis Kit with 520 Motors
2 mm thick aluminum alloy chassis; 4× 520 high-power motors; 2× 65 mm wear-resistant rubber tires; acrylic top cover; battery protection box; reserved sensor mounting holes

miniQ 2WD Robot Chassis
2WD robot chassis (listing page only observed name/price; full specs not captured)

Zumo Chassis Kit (No Motors)
Tracked chassis <10 cm per side (Mini Sumo legal); black ABS body, 4×AA battery compartment, sockets for 2 micro metal gearmotors; 2 silicone tracks, 2 drive + 2 idler sprockets, 1/16″ acrylic mounting plate, hardware; ~210 g assembled with motors+batteries

Balboa Chassis with Stability Conversion Kit
Black ABS snap-together chassis; configurable 4/6 AA battery holder; gearboxes for micro metal gearmotors; integrated 1″ plastic-ball caster; works with 60×8 mm to 90×10 mm wheels

20mm x 20mm Smooth T-Slotted Aluminum Extrusion (2020)
2020-series t-slot, slot opening ~6 mm (1/4″); weight 0.305 lbs/ft (0.454 kg/m); estimated area 1.638 cm²; Ix=Iy=0.67 cm⁴; custom cut available

2020 T-Slot Aluminum Extrusion Profile
6000-series aluminium alloy, T3-T8 temper; slot width 6.2 mm; weight 0.65 kg/m; stock length 6.02 m or custom cut; Ix=Iy=0.72 cm⁴; Zx=Zy=0.72 cm³; finishes: anodizing/mill/powder etc.
