API CodexAPI Codex
OEM & alternate tire sizes by vehicle

Tire Size API

The Tire Size API gives you OEM and alternate tire-size fitment data by vehicle. Browse makes and models, look up the fitment for a specific vehicle, or search by make, model, year or tire size.

Each record carries year, make, model, trim/submodel, the OEM tire size and any alternate sizes. Read-only and edge-served for fast "will it fit?" lookups.

Get API keys free Read the docs

Free tier · no credit card · billed on RapidAPI

580+
Fitments
<40ms
Response Time
36
Makes

Key features

  • List all makes
  • List models for a make
  • OEM + alternate sizes for a specific vehicle
  • Search by make, model, year or tire size
  • Narrowing-query search with clean 400 errors

Perfect for

  • Tire shops and e-commerce filters
  • Fitment "will it fit?" widgets
  • Fleet maintenance tools
  • Vehicle service apps
Documentation

Tire Size API Documentation

Everything you need to integrate — base URL, auth, and copy-paste examples.

The Tire Size API gives you OEM and alternate tire-size fitment data by vehicle. Browse makes and models, look up the fitment for a specific vehicle, or search by make, model, year or tire size.

Base URL

https://tire-size-api.p.rapidapi.com

Authentication

Subscribe on RapidAPI and send your X-RapidAPI-Key on every request — RapidAPI also sets the X-RapidAPI-Host header. No key is ever placed in the URL.

headers
GET /v1/by-vehicle?make=acura&model=nsx
X-RapidAPI-Key: YOUR_RAPIDAPI_KEY
X-RapidAPI-Host: tire-size-api.p.rapidapi.com

Request & response

Request
http
GET /v1/by-vehicle?make=acura&model=nsx HTTP/1.1
Host: tire-size-api.p.rapidapi.com
X-RapidAPI-Key: YOUR_RAPIDAPI_KEY
Response
json
{
  "count": 1,
  "limit": 20,
  "results": [
    {
      "year": 2022,
      "make": "Acura",
      "model": "NSX",
      "trim": "Acura NSX Type-S",
      "tire_size_oem": "245/35R19",
      "alternate_tire_sizes": "305/30R20"
    }
  ]
}

Code examples

cURL
curl --request GET \
  --url 'https://tire-size-api.p.rapidapi.com/v1/by-vehicle?make=acura&model=nsx' \
  --header 'X-RapidAPI-Key: YOUR_RAPIDAPI_KEY' \
  --header 'X-RapidAPI-Host: tire-size-api.p.rapidapi.com'

Available Endpoints

GET /v1/makes

List all makes.

/v1/makes

GET /v1/models

List models for a given make.

/v1/models?make=acura

GET /v1/by-vehicle

OEM and alternate tire sizes for a vehicle (make + model required, year optional).

/v1/by-vehicle?make=acura&model=nsx

GET /v1/search

Search fitments by make, model, year, tire size or free text (narrowing query required).

/v1/search?size=215/45R16

Request Parameters

Optional Parameters

  • make - Make (exact; required for by-vehicle).
  • model - Model (exact for by-vehicle, partial for search).
  • year - Exact model year (1900-2100).
  • size - Tire size; matches OEM or alternate sizes (e.g. 215/45R16).
  • q - Free-text match (3+ chars to qualify as narrowing).
  • limit - Max results (1-25, default 20).
Pricing

Tire Size API Pricing

Simple, scalable pricing built to reward upgrading — every tier lowers your per-request cost. The free tier is hard-capped for evaluation.

No credit card to start · cancel anytime

Basic

Free
100 Requests / Month
  • All endpoints
  • Full dataset
  • 1 req/s rate limit
  • Hard cap (no overage)
Get Started Free
Most popular

Pro

$9.99/month
10,000 Requests / Month
  • All endpoints
  • 10 req/s rate limit
  • $2.00 / 1k overage
Subscribe Now

Ultra

$29.99/month
100,000 Requests / Month
  • All endpoints
  • 25 req/s rate limit
  • $0.80 / 1k overage
Subscribe

Mega

$99.99/month
500,000 Requests / Month
  • All endpoints
  • 50 req/s rate limit
  • $0.30 / 1k overage
Subscribe

Need higher volume or a custom SLA?

Talk to us about enterprise rates, dedicated support, and compliance docs.

Contact sales
FAQ

Frequently asked questions

Year, make, model, trim/submodel, the OEM tire size and any alternate sizes.

Call /tires/v1/by-vehicle?make=acura&model=nsx (year optional). It returns the OEM size plus alternates, ordered by year.

Yes. /tires/v1/search?size=215/45R16 matches against both OEM and alternate sizes to find vehicles that take that size.

A curated sample of about 580 fitments across 36 makes, model years 1989-2025. List endpoints return up to 25 rows per call.

Keep building

Related APIs & tools

Other services that pair well — all on the same key.

Advanced Vehicle API

Cars, motorcycles, boats and tire fitment in one bundled API behind a single type switch.

Learn more→

Car Specs & Data API

Vehicle configurations with make, model, year, trim and full engine details.

Learn more→

Motorcycle Specs & Data API

Motorcycle and scooter reference: make, model, submodel, year and type.

Learn more→

Free tools you might like

API Executor

Test Tire Size API calls interactively with real-time responses.

API Diagram Generator

Visualize request/response flows for your integration.

Every week you build in-house is a week you don't ship product

2,500+ teams already made the switch. Start with a free tier today, or talk to us about your enterprise needs.

For developers

Free tier, no credit card. Integrate your first API in under 30 minutes.

Get API keys freeRead the docs

For teams and enterprise

Custom volumes, SLA guarantees, dedicated support, and compliance documentation.

Talk to sales

or email sales@apicodex.io