Everything on this page is free to use on your own website, forum, shop listing or course page. No sign-up, no API key, no ads inside the tools. The only thing we ask is that you keep the small credit link under each tool.
The data behind the tools is the ANKUSI open wheel fitment dataset: bolt pattern, center bore and factory wheel size for about 10,000 vehicle variants, released under CC BY 4.0 with a permanent DOI. How each value is checked is explained in How We Verify Wheel Fitment Data.
1. Bolt pattern and center bore lookup
A make and model picker with a quick search box. Visitors pick their car and see the bolt pattern, center bore and factory wheel size, with a link to the full fitment guide. It works on mobile and follows the visitor's light or dark mode.
Copy this code:
<iframe src="https://ankusiwheels.com/wp-content/uploads/ankusi-embed/lookup.html" width="100%" height="420" style="border:1px solid #ddd;border-radius:8px;max-width:640px" loading="lazy" title="Bolt pattern and center bore lookup"></iframe> <p style="font-size:13px">Bolt pattern lookup by <a href="https://ankusiwheels.com/bolt-pattern-statistics/">ANKUSI Wheels</a></p>
Options you can add to the address: ?make=Toyota opens the picker on one make (useful for a brand club or a single-brand shop), and ?theme=light or ?theme=dark fixes the colour scheme.
2. Spec card for one vehicle
A compact card showing the specs of a single car. Use it in a for-sale listing, a build thread, a product page for one model, or a club's technical page. Every vehicle fitment guide on this site has its own ready-made code under "Use this spec on your site". The format is:
<iframe src="https://ankusiwheels.com/wp-content/uploads/ankusi-embed/lookup.html?vehicle=toyota-tacoma&card=1" width="100%" height="230" style="border:0;max-width:560px" loading="lazy" title="Toyota Tacoma bolt pattern"></iframe> <p style="font-size:13px"><a href="https://ankusiwheels.com/fitment-guide/toyota-tacoma/">Toyota Tacoma bolt pattern and offset guide</a> by ANKUSI Wheels</p>
3. Offset, backspacing and tire diameter calculator
Converts offset (ET) to backspacing, compares an old and a new wheel, and shows how far the tire moves in and out. It is the same tool as our offset and backspacing calculator page.
<iframe src="https://ankusiwheels.com/wp-content/uploads/ankusi-embed/offset-calculator.html" width="100%" height="560" style="border:1px solid #ddd;border-radius:8px;max-width:640px" loading="lazy" title="Wheel offset calculator"></iframe> <p style="font-size:13px">Wheel offset calculator by <a href="https://ankusiwheels.com/offset-backspacing-tire-diameter-calculator/">ANKUSI Wheels</a></p>
4. For forums and chat groups: plain links
Many forums do not allow iframes. These short links answer the most common questions in a thread.
BBCode (vBulletin, XenForo, phpBB):
[url=https://ankusiwheels.com/bolt-pattern-statistics/]Bolt pattern lookup and statistics[/url] [url=https://ankusiwheels.com/offset-backspacing-tire-diameter-calculator/]Offset to backspacing calculator[/url]
Markdown (Reddit, Discord, GitHub):
[Bolt pattern lookup and statistics](https://ankusiwheels.com/bolt-pattern-statistics/) [Offset to backspacing calculator](https://ankusiwheels.com/offset-backspacing-tire-diameter-calculator/)
5. For developers, researchers and AI tools
- Full dataset: CSV and JSON downloads, versioned, with DOI: wheel fitment dataset.
- Keyless API: look up a vehicle by make and model: wheel fitment API.
- Summary tables: bolt pattern statistics and factory wheel size statistics.
- Citing: each data page has a "How to cite this page" box with APA, BibTeX and a ready HTML link.
Who uses these tools
| You run | Best tool | Why it helps |
|---|---|---|
| A car club or model forum | Lookup with ?make= set to your brand | Answers the "what is my bolt pattern" question once, on your own site. |
| A used-car or parts listing | Spec card | Buyers see the bolt pattern and center bore before asking. |
| A tire or alignment shop | Offset calculator | Customers can check poke and clearance before they call. |
| An automotive course or library guide | Lookup plus the dataset | Free, openly licensed, with a documented method students can cite. |
| A news or review site | Spec card or citation | Adds checked hub data to a new-model story in one line. |
Terms
The tools are free for any site, commercial or not. Please keep the credit link under each embed. The data is CC BY 4.0, so you may also copy it into your own tables as long as you credit ANKUSI Wheels with a link. Found a value that looks wrong? Email info@ankusi.com with the vehicle and your source, and we will check it against two independent sources.