{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "rc-wheel-hex-7mm",
 "name": "7 mm RC wheel hex",
 "kind": "standard",
 "category": "RC cars",
 "group": "Wheel hexes",
 "year": null,
 "question": "What size is a 7 mm RC wheel hex and which cars use it?",
 "tags": [
  "rc car",
  "rc truck",
  "radio control",
  "hobby rc",
  "wheel hexes"
 ],
 "aliases": [
  "7mm wheel hex",
  "7mm hex rc",
  "7 mm hex adapter",
  "7mm hex wheels",
  "which rc cars use 7mm hex",
  "7mm hex size",
  "hexágono 7mm rc",
  "7mm sechskant rc",
  "hex 7mm rueda rc"
 ],
 "overall_mm": {
  "length": 7,
  "width": 7,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/rc-wheel-hex-7mm/",
 "sheet_txt": "https://xemstudio.com/objects/rc-wheel-hex-7mm/sheet.txt",
 "sheet": {
  "basis": "Secondary source: RC Car Action (Traxxas release) (copy of the maker's figures; the maker publishes none directly)",
  "overall_mm": {
   "length": 7,
   "width": 7,
   "height": null
  },
  "notes": [
   "A 7 mm wheel hex is the hexagonal drive between axle and wheel; 7 mm is the across-flats size. The file is a 7 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.",
   "Secondary source: the numbers come from a retailer or magazine copy of the maker's specification."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "Across flats",
     "7 mm"
    ],
    [
     "Used on (published)",
     "Traxxas TRX-4M (Bronco, K10)"
    ]
   ]
  }
 },
 "sheet_text": "7 mm RC wheel hex — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/rc-wheel-hex-7mm/  (sheet CC BY 4.0)\nBasis: Secondary source: RC Car Action (Traxxas release) (copy of the maker's figures; the maker publishes none directly)\nCatalog version: 2026-10-20\n\nOverall (mm): length 7, width 7\n- A 7 mm wheel hex is the hexagonal drive between axle and wheel; 7 mm is the across-flats size. The file is a 7 mm across-flats hexagon profile.\n- Hex thickness, drive-pin size and bore are not published as a standard and are not modelled.\n- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.\n- Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.\n\ndimension  value\nAcross flats  7 mm\nUsed on (published)  Traxxas TRX-4M (Bronco, K10)\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- RC Car Action (Traxxas release): TRX-4M Chevrolet K10 High Trail — web — Publisher's page; dimensions are facts — https://www.rccaraction.com/?p=370072\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/rc-wheel-hex-7mm/index.json\nAPI: https://xemstudio.com/api/geometry?object=rc-wheel-hex-7mm\n",
 "sources": [
  {
   "publisher": "RC Car Action (Traxxas release)",
   "title": "TRX-4M Chevrolet K10 High Trail",
   "url": "https://www.rccaraction.com/?p=370072",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "rc-wheel-hex-12mm",
  "rc-wheel-hex-14mm",
  "rc-wheel-hex-17mm",
  "rc-wheel-hex-24mm"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "Which RC cars use 7 mm hexes?",
   "a": "Traxxas TRX-4M (Bronco, K10)."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "rc-wheel-hex-7mm-hex-profile",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/rc-wheel-hex-7mm/rc-wheel-hex-7mm-hex-profile.step",
   "stl": "https://xemstudio.com/files/hardware/rc-wheel-hex-7mm/rc-wheel-hex-7mm-hex-profile.stl",
   "note": "Hexagon 7 mm across flats, 1 mm reference thickness (hub length not published)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/rc-wheel-hex-7mm/index.md"
}