CheckFitment

Connect Remote server

claude mcp add --transport http checkfitment https://checkfitment.com/mcp?src=mcp

{
  "mcpServers": {
    "checkfitment": {
      "url": "https://checkfitment.com/mcp?src=mcp"
    }
  }
}

{
  "servers": {
    "checkfitment": {
      "type": "http",
      "url": "https://checkfitment.com/mcp?src=mcp"
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://checkfitment.com/mcp?src=mcp

Tools 6 found in our last check

• bolt_pattern_lookup

  Use for "what is the bolt pattern on a 2019 Ford F-150", lug torque, center bore, thread size, OEM wheel size, offset or tire size of a vehicle, or "will these wheels fit my car" when the vehicle is named. Looks the vehicle up in the CheckFitment dataset (a fixed set of vehicles…

• wheel_fitment_check

  Use to compare a current wheel (and tire) with a new one: how far the outer edge pokes toward the fender and the inner edge toward the suspension, the diameter and ride-height change, speedometer effect, backspacing, and whether the new tire width suits the new rim width. With m…

• tire_size_compare

  Use for "what changes if I go from 265/70R17 to 285/75R17", "how far off is my speedometer with 33s", or odometer error after a tire change. Returns diameter, width, sidewall and ride-height change, the true speed when the speedometer shows a given value, the odometer error and…

• wheel_spacer_calculator

  Use for "do I need spacers", "what spacer gets +35 wheels to +20", "is a 10 mm slip-on spacer safe". A spacer lowers the effective offset by its thickness. Returns the spacer needed for a target offset (and the nearest common size), the effective offset, track change, whether it…

• gear_ratio_calculator

  Use for "what does my 3.73 axle behave like on 35s", "what ratio do I need to regear for 33s", RPM at highway speed after a tire change, or the crawl ratio (with transfer-case low ratio and first gear). Returns the effective ratio, RPM before and after in a 1:1 gear, the ratio t…

• bolt_pattern_facts

  Use for "what is 5x114.3 in inches", "is 5x114.3 the same as 5x115", "will 6x135 wheels fit 6x139.7", or which vehicles use a pattern. Converts mm and inch notation, lists look-alike patterns that do not interchange, the vehicles in the dataset with that pattern, the lug tighten…

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