{
 "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": "track-width",
 "name": "Track width",
 "kind": "standard",
 "category": "Car design",
 "group": "Suspension geometry",
 "year": null,
 "question": "What does track width do and what are the RC limits?",
 "tags": [
  "vehicle design",
  "suspension geometry",
  "rc design",
  "aerodynamics",
  "guide"
 ],
 "aliases": [
  "track width",
  "rc track width",
  "wide track",
  "narrow track",
  "wheel track",
  "max width rc car",
  "hex offset track",
  "track width stability",
  "front track rear track"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/track-width/",
 "sheet_txt": "https://xemstudio.com/objects/track-width/sheet.txt",
 "sheet": {
  "basis": "Design rules and figures from the cited sources; example geometry by Xem Studio",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Track width governs side-to-side stability while wheelbase governs front-to-rear stability (CompetitionX). It also appears directly in the Ackermann condition (raw.org).",
   "RC classes set it by maximum car width: 190 mm without body for EFRA touring cars, 250 mm for 1/10 off-road, 172 mm for 1/12."
  ],
  "table": {
   "columns": [
    "parameter",
    "value or range",
    "source"
   ],
   "rows": [
    [
     "EFRA touring width",
     "190 mm without body, 200 mm with",
     "EFRA"
    ],
    [
     "ISTC width",
     "170-190 mm without body",
     "AARCMCC"
    ],
    [
     "1/10 off-road max width",
     "250 mm",
     "EFRA"
    ],
    [
     "1/12 max width",
     "172 mm",
     "EFRA"
    ],
    [
     "FSAE example",
     "1262 mm front, 1392 mm rear",
     "Univ. of Utah FSAE"
    ]
   ]
  }
 },
 "sheet_text": "Track width — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/track-width/  (sheet CC BY 4.0)\nBasis: Design rules and figures from the cited sources; example geometry by Xem Studio\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Track width governs side-to-side stability while wheelbase governs front-to-rear stability (CompetitionX). It also appears directly in the Ackermann condition (raw.org).\n- RC classes set it by maximum car width: 190 mm without body for EFRA touring cars, 250 mm for 1/10 off-road, 172 mm for 1/12.\n\nparameter  value or range  source\nEFRA touring width  190 mm without body, 200 mm with  EFRA\nISTC width  170-190 mm without body  AARCMCC\n1/10 off-road max width  250 mm  EFRA\n1/12 max width  172 mm  EFRA\nFSAE example  1262 mm front, 1392 mm rear  Univ. of Utah FSAE\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- CompetitionX: RC Wheelbase Explained — web — Publisher's page; dimensions are facts — https://www.competitionx.com/?p=1253\n- raw.org (kinematics notes): Ackerman steering — web — Publisher's page; dimensions are facts — https://raw.org/book/kinematics/ackerman-steering/\n- EFRA: EFRA Handbook 2010, Appendix 3: Electric Cars — web — Publisher's page; dimensions are facts — https://www.efra.ws/wp-content/uploads/2010/03/Handb10App3.pdf\n- AARCMCC: Section 3: Electric On Road, Technical Rules (Oct 2006) — web — Publisher's page; dimensions are facts — https://www.rctech.net/forum/attachments/australian-racing/180184d1162811203-aarcmcc-online-tech-road-oct-06.pdf\n- University of Utah, Mechanical Engineering: Formula SAE Suspension System (senior design) — web — Publisher's page; dimensions are facts — https://mech.utah.edu/wp-content/uploads/2024/12/5-Formula-SAE-Suspension.pdf\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=track-width\n",
 "sources": [
  {
   "publisher": "CompetitionX",
   "title": "RC Wheelbase Explained",
   "url": "https://www.competitionx.com/?p=1253",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "raw.org (kinematics notes)",
   "title": "Ackerman steering",
   "url": "https://raw.org/book/kinematics/ackerman-steering/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "EFRA",
   "title": "EFRA Handbook 2010, Appendix 3: Electric Cars",
   "url": "https://www.efra.ws/wp-content/uploads/2010/03/Handb10App3.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "AARCMCC",
   "title": "Section 3: Electric On Road, Technical Rules (Oct 2006)",
   "url": "https://www.rctech.net/forum/attachments/australian-racing/180184d1162811203-aarcmcc-online-tech-road-oct-06.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "University of Utah, Mechanical Engineering",
   "title": "Formula SAE Suspension System (senior design)",
   "url": "https://mech.utah.edu/wp-content/uploads/2024/12/5-Formula-SAE-Suspension.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "camber",
  "caster",
  "kick-up",
  "toe-front",
  "toe-rear",
  "ackermann"
 ],
 "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": "How do I widen track on RC?",
   "a": "With wheel hex offset or arm length, within the class width limit."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/track-width/index.md"
}