Wheel Fitment API

The Wheel Fitment API allows programmatic access to the database of www.wheel-size.com and its services.

October, 2021 Wheel Size releases a powerful Wheel Fitment API /v2/. Compared to the older API version, the new API covers much more functionality. Please check all changes on our API v2 Demo Portal.

API v2 Demo Portal OpenAPI v2 specification

Please consider that API /v2/ is now the preferred version to be used. The old API will remain fully functional until July 1, 2023.

We’re aimed to give our existing customers enough time to switch to the new API version and will notify them in advance once we know the exact deprecation date for the old API.

Getting started

First thing you need is your API user key. Create the free account, if you don’t have one yet. No credit card required.

Client SDKs (API Client Libraries for v1):

We provide clients for multiple programming languages. These helper libraries make the integration of our service into your web or application faster and easier.

All the clients are in one-to-one correspondence to the API.
Currently we provide clients for the following languages:

Feel free to use our OpenAPI-defined API (v1), OpenAPI-defined API (v2) and Swagger Codegen to generate client for your programming language

Pick your plan



  • Testing only


This plan is free of charge


  • 100 hits per hour
  • 300 hits per day



  • Support
  • Production
  • /upsteps/ API method




  • 5000 hits per day

Still need more?

For large enterprise companies, we can also deliver bulk wheel size data in the format you need.

We can arrange for a customized commercial license that allows your business to host API service and data on your own servers with regular updates.

Contact Us


What data does Wheel-Size.com provide?
Wheel-Size.com provides frequently maintained data with over 100 car makes including 3200+ models for 12 global markets.

We have a dedicated team working on adding new data and improving the accuracy daily.
What does Wheel Fitment API provide?
Wheel Fitment API provides the REST-ful interface for you to access our data.

What is considered an API request?
We treats a request as anytime you call an API. Depending on your Developer plan, your account will limit the number of requests you can make in a month.
Do you store any credit card information in your systems?
No. All credit card activity and information is handled by our third-party provider, Paypal. See Paypal`s Terms and Services.

How do I cancel my subscription?
You can cancel your account anytime by contacting our Support Team or do it in your Paypal account.

What credit cards can I use with PayPal?
You can use Visa, MasterCard, Discover, or American Express to make PayPal payments. Another fast and easy option is paying with your bank account.

How frequently am I billed?
All subscription plans are billed on a yearly basis.
Can I test Wheel Fitment API before buying it?
Yes. Test your application by creating a Sandbox account. The sandbox functions like our production environment.

I have some problems with selecting cars from our website through your api. Sometimes they just timeout for cars like BMW and Audi.
An easy and convenient way to reduce the bandwidth and response time needed for each request is to enable gzip compression. In order to receive a gzip-encoded response you must do the following thing: Set an Accept-Encoding header:
Accept-Encoding: gzip

Examples of usage

Please see our Demos, website, widgets, Wheel Size Calculator, iOS and Android mobile apps are a good example of how our API works.

Run your requests

$ curl -v -X GET "https://api.wheel-size.com/v1/"