WR1 V2
3D Printable R/C Rally Chassis | Digital File Bundle
A complete bundle of STL/3MF print files and a comprehensive 67-page assembly guide for building a custom, 1/8 scale AWD RC rally chassis from scratch on your home 3D printer.
What You’re Getting
Digital product - no physical items will be shipped. Files are for personal use and may not be redistributed or resold.
What You're Getting
This is a digital product - you receive a complete bundle of STL/3MF print files and a professional 67-page assembly guide, everything you need to build a fully custom, all-wheel-drive RC rally chassis from scratch on your home 3D printer.
This is not a kit. There are no parts in a box. What you're buying is the design - engineered from the ground up to be printed, assembled, and driven.
What's Included
3D Print Files
- Full set of STL/3MF files for every printed component on the WR1 chassis
- Split-body alternatives for printers with build volumes as small as 180x180mm - no full-size printer required
- Optimized geometry for common FDM materials (PETG, ASA, or PLA+ for low-stress parts)
67-Page Assembly Guide
- IKEA-style step-by-step renderings for every major assembly stage - no guesswork
- 46+ clearly numbered steps from bare frame to rolling chassis
- Tolerances and fit notes called out where they matter most
Itemized Hardware BOM with Active Links
- Every non-printed fastener, bearing, shaft, differential, and electronic component listed by name and spec
- Multiple sourcing options per item (Amazon and AliExpress) so you can choose speed or savings
- Links verified at time of publication - no hunting for part numbers
The Build
The WR1 is a purpose-designed AWD rally platform built around readily available RC drivetrain components. It features independent suspension on all four corners, front, center, and rear differentials, and is sized to run WR8-compatible wheels and tires.
- Drive system: HobbyWing Quicrun 10BL120 G2 ESC paired with a 3660 brushless motor - a proven, serviceable combination used across the performance RC community.
- Suspension: Independent on all four corners with 85mm front and 95mm rear oil-filled shocks.
- Differentials: Three-diff AWD layout (front, center, rear) using GPM-spec metal internals - the same approach used in full-production RC cars at 3-4x the cost.
- Wheels: Designed to accept HPI WR8 Tarmac wheels and tires directly off the shelf.
What You'll Need to Buy
Building a WR1 requires purchasing the non-printed hardware separately. Here's an honest breakdown:
| Electronics (motor, ESC, servo) | ~$117 |
| Drivetrain (diffs, shafts, pinion, links) | ~$129 |
| Suspension (shocks) | ~$23 |
| Bearings | ~$19 |
| Fasteners, inserts, pins, nuts | ~$73 |
| Consumables (fluids, grease, glue) | ~$20 |
| Wheels + Tires | ~$23 |
| Rolling chassis total | ~$404 |
One-time tools (soldering iron, hex drivers, pliers) are additional if you don't already own them.
The assembly guide includes a complete, itemized hardware list with direct purchase links for every component above. Every item is sourceable from Amazon or AliExpress - nothing obscure, nothing discontinued.
Who This Is For
You'll get the most out of this if you:
- Have built or modded an RC car before and are comfortable with assembly
- Own or have access to an FDM 3D printer (minimum 180x180mm build plate)
- Want a platform you fully understand and can repair yourself
File Format & Compatibility
- Files delivered as STL and/or 3MF
- Compatible with all major slicers: Bambu Studio, Orca Slicer, PrusaSlicer, Cura
- Recommended materials: PETG or ASA for chassis components, PLA+ acceptable for low-load parts
- Print settings guide included in the assembly document
From CURV LAB
The WR1 is the most complete thing we've published - a full rolling chassis, not just a body shell.
