Wheel Fitment API: Free Bolt Pattern & Offset Data (JSON)

A free, open JSON API for wheel fitment data: bolt pattern (PCD), center bore, factory wheel size and offset, plus flush and maximum aftermarket sizes, for 10,070 vehicles. No API key, HTTPS only, CORS enabled, licensed CC BY 4.0. It serves the same records as the open ANKUSI Wheel Fitment Dataset (current version 2026.10.10).

Endpoints

Query parameters for /fitment

At least one of make, model or bolt_pattern is required; otherwise the API answers with HTTP 400.

Example requests

curl 'https://ankusiwheels.com/wp-json/ankusi/v1/fitment?make=Toyota&model=Camry&limit=2'

curl 'https://ankusiwheels.com/wp-json/ankusi/v1/fitment?bolt_pattern=6x139.7&limit=10'

fetch('https://ankusiwheels.com/wp-json/ankusi/v1/fitment?make=BMW&model=M3')
  .then(r => r.json())
  .then(d => console.log(d.results));

Example response

{
    "dataset_version": "2026.10.10",
    "license": "CC BY 4.0",
    "attribution": "ANKUSI Wheel Fitment Dataset, https://ankusiwheels.com/wheel-fitment-api/",
    "doi": "10.5281/zenodo.23280367",
    "count": 1,
    "results": [
        {
            "make": "Toyota",
            "model": "Toyota Camry Hybrid [EU]",
            "year": "2019",
            "chassis_code": "",
            "bolt_pattern": "5x114.3",
            "lug_count": "5",
            "center_bore_mm": "60.1",
            "center_bore_rear_mm": "",
            "oe_wheel": "F/R: 17x7.5J at ET40 offset, front and rear",
            "flush_wheel": "18x8.0J ET38",
            "max_wheel": "19x8.5J ET35",
            "source_url": "https://ankusiwheels.com/fitment-guide/toyota-camry-hybrid-eu/"
        }
    ]
}

Fields

License and attribution

Data is released under CC BY 4.0. You can use it in commercial and non-commercial projects; please credit "ANKUSI Wheel Fitment Dataset" with a link to this page. Bolt pattern and center bore values are cross-checked against two independent sources before release; flush and maximum sizes are references, not guarantees.

Limits and changes

The API is free and has no key. Responses are cached for one hour. Please cache results on your side and avoid more than one request per second. Field names are stable; new fields may be added. Data updates follow the dataset releases listed in the changelog on the dataset page.

Want to see the data in action without writing code? The Will It Fit? wheel fitment checker uses this dataset to check any wheel size and offset against a vehicle.

Related: bolt pattern statistics, bolt pattern chart by make, wheel interchange chart.

Source: ANKUSI Wheel Fitment API (ankusiwheels.com)

ANKUSI Wheels. (2026). ANKUSI Wheel Fitment API. Retrieved October 13, 2026, from https://ankusiwheels.com/wheel-fitment-api/

@misc{ankusi2026wheelfitmen,
  author = {{ANKUSI Wheels}},
  title = {ANKUSI Wheel Fitment API},
  year = {2026},
  howpublished = {\url{https://ankusiwheels.com/wheel-fitment-api/}},
  note = {Accessed October 13, 2026}
}

<a href="https://ankusiwheels.com/wheel-fitment-api/">ANKUSI Wheel Fitment API</a> (ANKUSI Wheels)