{
 "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": "rwd-mid-vs-rear-motor",
 "name": "2WD buggy layout: mid-motor vs rear-motor",
 "kind": "standard",
 "category": "Car design",
 "group": "Suspension geometry",
 "year": null,
 "question": "Mid-motor or rear-motor 2WD buggy: what's the difference?",
 "tags": [
  "vehicle design",
  "suspension geometry",
  "rc design",
  "aerodynamics",
  "guide"
 ],
 "aliases": [
  "mid motor buggy",
  "rear motor buggy",
  "2wd buggy layout",
  "mid motor vs rear motor",
  "laydown transmission",
  "standup transmission",
  "3 gear vs 4 gear",
  "rc buggy weight distribution",
  "moment of inertia rc"
 ],
 "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/rwd-mid-vs-rear-motor/",
 "sheet_txt": "https://xemstudio.com/objects/rwd-mid-vs-rear-motor/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": [
   "Rear-motor 2WD buggies hang the motor behind the rear axle, putting weight on the driven wheels for low-grip tracks and strong acceleration but with a tendency to wheelie (RCTech forum).",
   "Mid-motor layouts centralise mass and lower the yaw inertia, so the car turns in and straightens with less effort and slides more predictably; racers describe them as better on medium-to-high grip (RCTech forum).",
   "These are racer reports, not measured data."
  ],
  "table": {
   "columns": [
    "parameter",
    "value or range",
    "source"
   ],
   "rows": [
    [
     "Mid-motor benefit",
     "centralised mass, lower moment of inertia",
     "RCTech forum"
    ],
    [
     "Rear-motor benefit",
     "more rear weight, low-grip traction",
     "RCTech forum"
    ],
    [
     "Weight transfer not tunable out",
     "200 g+",
     "RCTech forum"
    ]
   ]
  }
 },
 "sheet_text": "2WD buggy layout: mid-motor vs rear-motor — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/rwd-mid-vs-rear-motor/  (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- Rear-motor 2WD buggies hang the motor behind the rear axle, putting weight on the driven wheels for low-grip tracks and strong acceleration but with a tendency to wheelie (RCTech forum).\n- Mid-motor layouts centralise mass and lower the yaw inertia, so the car turns in and straightens with less effort and slides more predictably; racers describe them as better on medium-to-high grip (RCTech forum).\n- These are racer reports, not measured data.\n\nparameter  value or range  source\nMid-motor benefit  centralised mass, lower moment of inertia  RCTech forum\nRear-motor benefit  more rear weight, low-grip traction  RCTech forum\nWeight transfer not tunable out  200 g+  RCTech forum\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- RCTech forums: Advantages of mid motor vs rear motor RWD buggy — web — Publisher's page; dimensions are facts — https://www.rctech.net/forum/electric-off-road/907243-advantages-mid-motor-vs-rear-motor-rwd-buggy.html\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=rwd-mid-vs-rear-motor\n",
 "sources": [
  {
   "publisher": "RCTech forums",
   "title": "Advantages of mid motor vs rear motor RWD buggy",
   "url": "https://www.rctech.net/forum/electric-off-road/907243-advantages-mid-motor-vs-rear-motor-rwd-buggy.html",
   "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": "Which for dusty tracks?",
   "a": "Racers favour rear-motor on low grip (RCTech forum)."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/rwd-mid-vs-rear-motor/index.md"
}