3D Printed RC Cars — Best Models, Parts & Building Tips

Building an RC car from 3D printed parts is one of the most rewarding projects you can tackle with a desktop printer. It combines mechanical design, electronics, material science, and hands-on assembly into a single build that actually does something when you finish it. Unlike a display model that sits on a shelf, a 3D printed RC car drives, crashes, breaks, gets fixed, and drives again — and every part of that cycle teaches you something.

This guide covers the best open-source RC car designs, what electronics you need, material selection for each component, how to print reliable TPU tires, and building tips that save hours of frustration.

Best Open-Source 3D Printed RC Car Designs

OpenRC F1

The OpenRC F1 by Daniel Noree is the most iconic 3D printed RC car ever designed. This Formula 1 style car at roughly 1:10 scale has been downloaded over 330,000 times on Thingiverse alone, making it the most reproduced 3D RC design in history.

What makes it great:

• Designed specifically for desktop FDM printers — no supports needed for most parts.
• Fully documented assembly with community guides and videos.
• Modular design allows individual component upgrades.
• Active community of builders sharing modifications and improvements.
• All files are freely available.

Electronics needed: Standard 1:10 scale RC electronics — a brushed or brushless motor, ESC, steering servo, receiver, and transmitter.

3D Sets Off-Road RC Cars

As Prusa documented, 3D Sets produces high-quality printable RC vehicle designs including off-road trucks, buggies, and crawlers. These designs feature working suspension, detailed bodies, and are optimized for PLA and PETG printing. Some are free, others are paid designs.

Tarmo Series

The Tarmo is a popular open-source 3D printed RC drift car designed by Kris Sheldon. It features a rear-wheel-drive layout, adjustable suspension geometry, and hot-swappable body shells. Multiple versions exist, with the community continuously improving the design.

Fully 3D Printed Builds

As documented on Hackster.io, fully 3D printed RC cars — where even the gearbox, wheels, and tires come from the printer — are achievable but require careful material selection and design iteration. These builds use PLA for the rigid chassis and TPU for the flexible tire sections.

Electronics — What You Need

Building a 3D printed RC car requires the same electronics as any hobby-grade RC vehicle. Here is what goes into a typical build:

Motor

• Brushed motors — Simpler, cheaper, good for beginners. The 540-class brushed motor is the standard for 1:10 scale cars. Around $5-15.
• Brushless motors — Faster, more efficient, longer-lasting. A 3650-class brushless motor fits most 1:10 scale printed chassis. $15-40.

Electronic Speed Controller (ESC)

The ESC converts signals from the receiver into motor speed and direction. Match it to your motor type (brushed ESC for brushed motors, brushless ESC for brushless motors). Budget: $15-30.

For more advanced builds, an ESP32 microcontroller can serve as both the receiver and speed controller, receiving commands from a custom controller via WiFi or Bluetooth and driving the motor through an H-bridge or ESC module.

Steering Servo

A standard-size hobby servo handles steering. For 1:10 scale cars, a servo with 5-10 kg-cm of torque is sufficient. Metal gear servos are more durable than plastic gear versions. Budget: $8-20.

Receiver and Transmitter

A 2.4GHz radio system provides reliable control at ranges of 100+ meters. Entry-level systems from FlySky or Dumborc cost $30-50 for a transmitter and receiver bundle. More advanced Futaba or Spektrum systems offer better range and features.

Battery

• NiMH packs — Safer, cheaper, simpler charging. Good for beginners. A 7.2V 3000mAh NiMH pack costs around $15-25.
• LiPo packs — More power, lighter weight, but require balance chargers and careful handling. A 2S (7.4V) 5000mAh LiPo costs $20-35.

Total Electronics Budget

A complete electronics package for a 3D printed RC car runs approximately $80-150 depending on quality and whether you choose brushed or brushless.

Material Selection for Each Component

Not every part of an RC car should be printed in the same material. Here is a component-by-component breakdown:

Chassis and Frame — PLA or PETG

The main chassis takes the most structural load. PLA works for indoor driving and light bashing. PETG is preferred for outdoor use and harder driving due to its higher impact resistance and temperature tolerance.

| Material | Infill | Wall Count | Notes | |---|---|---|---| | PLA | 30-50% | 3-4 | Indoor use, light driving | | PETG | 30-50% | 3-4 | Outdoor use, moderate bashing | | PETG-CF | 25-40% | 3-4 | Best strength-to-weight ratio |

Suspension Arms — PETG or PA (Nylon)

Suspension components experience repeated flexing and impact loads. PETG handles this adequately for casual driving. Nylon (PA) is ideal for serious bashing due to its excellent fatigue resistance and impact absorption.

Tires — TPU

TPU is the only reasonable choice for 3D printed tires. The flexibility provides grip and shock absorption, while the durability handles the abrasion of driving on rough surfaces.

Gears — PLA+ or PETG

Gears need rigidity and precision. PLA+ (an impact-modified PLA) or PETG work well. Print gears with 100% infill and slow speeds (20-30 mm/s) for maximum accuracy and strength.

Body Shells — PLA

The body is decorative and takes glancing impacts. PLA is fine and offers the widest color selection for aesthetic customization.

Battery Mounts — PETG with TPU Pads

The battery mount must hold the heaviest component securely during crashes and jumps. Print the mount structure in PETG and add TPU padding to prevent the battery from shifting.

Printing TPU Tires — The Complete Guide

TPU tires are the most challenging part of a 3D printed RC car build. Getting them right makes the difference between a car that drives well and one that slides around uselessly.

Print Settings for RC Car TPU Tires

| Setting | Value | |---|---| | Nozzle Temperature | 225-235°C | | Bed Temperature | 50-60°C | | Print Speed | 20-25 mm/s | | Infill | 15-30% (lower = softer tire) | | Infill Pattern | Gyroid (best for omnidirectional flex) | | Wall Count | 3 | | Layer Height | 0.16-0.2 mm | | Retraction | Disabled or minimal (0.5 mm max) | | Cooling Fan | 60-80% |

Tire Design Considerations

• Tread pattern matters. Smooth tires work for indoor flat surfaces and drift builds. Aggressive tread patterns provide grip on outdoor surfaces.
• Shore hardness selection. As covered by ColorFabb's RC tire guide, specialized TPU variants like VarioShore can create foamed tires with tunable softness. Standard 95A TPU produces firm tires; 85A produces softer, grippier tires.
• Infill as suspension. Lower infill creates a softer tire that absorbs more vibration. Higher infill creates a firmer tire with more precise handling. Experiment to find the right balance for your driving surface.

The Grip Problem

One honest reality: 3D printed TPU tires typically have less grip than commercial rubber RC tires. As documented by builders, printed airless TPU tires can be slippery on smooth surfaces. Solutions include:

• Printing hub adapters and using commercial 1:10 scale rubber tires instead.
• Coating TPU tires with shoe sole rubber cement for added grip.
• Using softer TPU (85A) for more traction at the expense of durability.
• Designing tread patterns optimized for your specific driving surface.

Suspension Systems

A working suspension dramatically improves how a 3D printed RC car handles bumps and landings. Common approaches:

Spring-Based Suspension

The most realistic approach uses small metal springs (readily available on Amazon or from hobby shops). Print the shock tower and linkages in PETG, use metal springs for the actual compliance, and secure with M3 screws and nuts.

Flexible Suspension Arms

Print the entire suspension arm in TPU with specific flex zones designed in. Simpler than spring-based systems but less adjustable.

No Suspension

For flat, indoor surfaces, a rigid chassis with TPU tires provides enough compliance through tire flex alone. Many drift builds skip suspension entirely.

Building Tips That Save Hours

1. Print a test chassis first. Use low infill (15%) PLA to verify that all components fit before committing to a full PETG or nylon print at high infill.

2. Buy hardware kits. M2, M3, and M4 screw assortment kits with nuts and washers cost $10-15 and save countless trips to the hardware store. Most 3D printed RC designs use M3 hardware extensively.

3. Use threaded inserts. Heat-set brass inserts in printed PLA or PETG provide reusable screw threads that do not strip out after repeated disassembly. A soldering iron and M3 inserts cost under $15.

4. Wire everything before final assembly. Solder connectors, test motor direction, and verify servo travel before mounting electronics in the chassis. Fixing wiring inside a fully assembled car is miserable.

5. Add mounting redundancy. If a component is held by two screws, add zip-tie slots as backup. Crashes always find the weakest attachment point.

6. Keep spare tires printed. Tires are the highest-wear item. Print several sets and keep them ready.

7. Document your build. Take photos at each assembly stage. When something breaks, you will want to know how it went together originally.

Where to Find RC Car Models

3DSearch is the fastest way to find 3D printable RC car designs across all major platforms. Search for "RC car," "OpenRC," or specific car types like "RC drift" or "RC crawler" to browse designs from Thingiverse, Printables, MakerWorld, and other repositories in one search.

As UnionFab's RC car parts guide documents, the ecosystem of printable RC components continues to grow, with designs available for everything from complete car builds to individual replacement parts for commercial RC vehicles.

Estimated Costs

| Component | Cost | |---|---| | Filament (PLA/PETG/TPU) | $30-60 | | Motor + ESC | $20-50 | | Steering Servo | $8-20 | | Radio System (TX + RX) | $30-50 | | Battery + Charger | $25-45 | | Hardware (screws, bearings) | $10-20 | | Total | $120-250 |

Compare this to a comparable hobby-grade ready-to-run RC car at $200-400, and the 3D printed route is competitive on price while being infinitely more educational and customizable.

Final Thoughts

A 3D printed RC car is the project that brings together everything you learn as a maker. You design in CAD, optimize slicer settings for different materials, solder electronics, assemble mechanical systems, and iterate when things break. The first version will not be perfect — accept that. The third or fourth version will be excellent, and you will have learned more about 3D printing, mechanical design, and electronics than any tutorial could teach.

Start with a proven design like the OpenRC F1, learn the assembly and electronics fundamentals, and then start modifying and designing your own components. The community is welcoming, the files are freely available, and the result is something that actually drives.

Happy printing!