# 12 mm RC wheel hex

> What size is a 12 mm RC wheel hex and which cars use it?

- Category: RC cars › Wheel hexes
- Kind: Standard part
- Basis: Manufacturer specifications (Axial (Horizon Hobby), RC Car Action (Team Associated release))
- Page: https://xemstudio.com/objects/rc-wheel-hex-12mm/ · JSON: https://xemstudio.com/api/geometry?object=rc-wheel-hex-12mm · Plain text: https://xemstudio.com/objects/rc-wheel-hex-12mm/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width |
|---|---|
| 12 | 12 |

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- A 12 mm wheel hex is the hexagonal drive between axle and wheel; 12 mm is the across-flats size. The file is a 12 mm across-flats hexagon profile.
- Hex thickness, drive-pin size and bore are not published as a standard and are not modelled.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.

## Sizes

| dimension | value |
|---|---|
| Across flats | 12 mm |
| Used on (published) | Traxxas TRX-4 and TRX-6, Axial SCX10 III and UTB18 Capra, Team Associated Rival MT10 |

## Where the files are

- Axial (Horizon Hobby): [SCX10 III Jeep JLU AXI03003](https://www.axialadventure.com/product/axial-1-10-scx10-iii-jeep-jlu-wrangler-4x4-rock-crawler-with-portals-rtr/AXI03003.html) — web — Publisher's page; dimensions are facts
- Axial (Horizon Hobby): [UTB18 Capra AXI01002V2](https://www.axialadventure.com/product/axial-1-18-utb18-capra-4wd-unlimited-trail-buggy-rtr/AXI01002V2.html) — web — Publisher's page; dimensions are facts
- RC Car Action (Team Associated release): [Rival MT10 Brushless RTR V2](https://www.rccaraction.com/?p=361155) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/rc-wheel-hex-12mm/index.json

- rc-wheel-hex-12mm-hex-profile: [STEP](https://xemstudio.com/files/hardware/rc-wheel-hex-12mm/rc-wheel-hex-12mm-hex-profile.step) · [STL](https://xemstudio.com/files/hardware/rc-wheel-hex-12mm/rc-wheel-hex-12mm-hex-profile.stl) — Hexagon 12 mm across flats, 1 mm reference thickness (hub length not published)

## Questions

**Which RC cars use 12 mm hexes?**

Traxxas TRX-4 and TRX-6, Axial SCX10 III and UTB18 Capra, Team Associated Rival MT10.

## Fits with

- [7 mm RC wheel hex](https://xemstudio.com/objects/rc-wheel-hex-7mm/)
- [14 mm RC wheel hex](https://xemstudio.com/objects/rc-wheel-hex-14mm/)
- [17 mm RC wheel hex](https://xemstudio.com/objects/rc-wheel-hex-17mm/)
- [24 mm RC wheel hex](https://xemstudio.com/objects/rc-wheel-hex-24mm/)