{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "bike-handlebar-clamp-25-4-mm",
 "name": "Bike handlebar clamp diameter 25.4 mm (1 in, ISO)",
 "kind": "modern",
 "category": "Everyday objects",
 "group": "Bicycles",
 "year": null,
 "question": "What is a 25.4 mm handlebar?",
 "tags": [
  "bike",
  "handlebar",
  "bicycle"
 ],
 "aliases": [
  "25.4 handlebar",
  "25.4mm handlebar clamp",
  "handlebar diameter"
 ],
 "overall_mm": {
  "length": 100,
  "width": 25.4,
  "height": 25.4
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/bike-handlebar-clamp-25-4-mm/",
 "sheet_txt": "https://xemstudio.com/objects/bike-handlebar-clamp-25-4-mm/sheet.txt",
 "sheet": {
  "basis": "Sheldon Brown handlebar crib sheet (widely cited reference)",
  "overall_mm": {
   "length": 100,
   "width": 25.4,
   "height": 25.4
  },
  "notes": [
   "Clamp (centre) diameter 25.4 mm. Grip area: 22.2 mm on upright/MTB bars, 23.8 mm on drop bars.",
   "The file is a 100 mm length of bar at the clamp diameter."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "clamp diameter",
     "25.4 mm (1.00 in)"
    ],
    [
     "upright grip area",
     "22.2 mm"
    ],
    [
     "drop-bar grip area",
     "23.8 mm"
    ]
   ]
  }
 },
 "sheet_text": "Bike handlebar clamp diameter 25.4 mm (1 in, ISO) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/bike-handlebar-clamp-25-4-mm/  (CC BY 4.0)\nBasis: Sheldon Brown handlebar crib sheet (widely cited reference)\nCatalog version: 2026-10-20\n\nOverall (mm): length 100.0, width 25.4, height 25.4\n- Clamp (centre) diameter 25.4 mm. Grip area: 22.2 mm on upright/MTB bars, 23.8 mm on drop bars.\n- The file is a 100 mm length of bar at the clamp diameter.\n\ndimension  value\nclamp diameter  25.4 mm (1.00 in)\nupright grip area  22.2 mm\ndrop-bar grip area  23.8 mm\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Sheldon Brown: Handlebar dimensions — web — Publisher's page; dimensions are facts — https://www.sheldonbrown.com/cribsheet-handlebars.html\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/bike-handlebar-clamp-25-4-mm/index.json\nAPI: https://xemstudio.com/api/geometry?object=bike-handlebar-clamp-25-4-mm\n",
 "sources": [
  {
   "publisher": "Sheldon Brown",
   "title": "Handlebar dimensions",
   "url": "https://www.sheldonbrown.com/cribsheet-handlebars.html",
   "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": [
  "bicycle-handlebar-diameters",
  "bike-handlebar-clamp-26-0-mm",
  "bike-handlebar-clamp-31-8-mm",
  "bike-handlebar-clamp-22-2-mm"
 ],
 "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": "What fits a 25.4 mm bar?",
   "a": "Stems, lights and mounts made for a 25.4 mm clamp."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "bar-25.4mm-100",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/bike-handlebar-clamp-25-4-mm/bar-25.4mm-100.step",
   "stl": "https://xemstudio.com/files/hardware/bike-handlebar-clamp-25-4-mm/bar-25.4mm-100.stl",
   "note": "Ø25.4 × 100 mm bar section"
  }
 ],
 "markdown": "https://xemstudio.com/objects/bike-handlebar-clamp-25-4-mm/index.md"
}