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Tire Buying Guides

How to Find OEM Factory Tires for Your Vehicle

A simple guide to figuring out your original equipment manufacturer (OEM) factory tires

Find your tire size
Last updated 3/19/2026 - Originally published 9/14/2020
Written by SimpleTire, Expertly reviewed by Brett Antosh

Every vehicle rolls off the assembly line with a carefully selected set of tires designed to complement its specific performance characteristics. These original equipment manufacturer (OEM) factory tires represent years of collaborative engineering between automakers and tire manufacturers.

Finding the exact replacement for your vehicle's original tire can seem daunting with thousands of options available. However, when you buy automotive tires online for less at SimpleTire, understanding how to identify these specifications simplifies the process significantly. Choosing the right OEM tires ensures your car performs exactly as the manufacturer intended.

What are OEM Tires?

What are OEM tires? Simply put, OEM tire models (Original Equipment Manufacturer) are the specific factory tires that come standard on your vehicle. These are not random selections; automakers work with tire engineers to optimize ride quality, fuel efficiency, and safety features.

Many OEM tires feature special markings on their sidewalls to indicate manufacturer approval:

  • Star symbol: BMW-approved tires
  • MO: Mercedes-Benz original equipment
  • TPC: General Motors specification
  • AO: Audi original
  • N0, N1, N2: Porsche-approved variations
  • T0, T1: Tesla-specific designs

These designations confirm that the tire meets the exact tire load index, speed rating, and performance characteristics tailored to that specific vehicle platform.

How to Find Tires by VIN

The most accurate way to maintain your vehicle's standards is to find tires by VIN. Your Vehicle Identification Number (VIN) is a 17-digit code found on your dashboard or driver’s side door frame. Using a tire size by VIN search ensures you get the exact factory configuration.

  • Locate your VIN: Look at the lower corner of the windshield or the door jamb.
  • Tire size by VIN number: Use online decoder tools or the SimpleTire search bar to cross-reference your VIN with manufacturer databases.
  • Check the Placard: Always verify the tire size by VIN against the tire information placard on the driver’s side door frame for recommended inflation and load specs.

Steps to Secure Your Factory Tires

  • Identify Specifications: Gather your VIN and check the owner's manual for the required tire load index and speed rating.
  • Use Online Resources: Navigate to SimpleTire and input your vehicle details. Filter results for "Original Equipment" to find your original tire match.
  • Consult a Professional: If you're unsure about what are OEM tires for your trim level, the team at SimpleTire can confirm the precise fitment.
  • Purchase Reliably: Buy automotive tires online for less at SimpleTire to ensure you are getting high-quality, authentic factory tires with solid warranties.

Tips on Choosing OEM Tires

  • Verify Size and Load: Ensure the tire size code (e.g., 235/55R19) and the tire load index match your vehicle's documentation to avoid overstressing the rubber.
  • Match Driving Conditions: Consider if your OEM tire was an all-season or a high-performance summer tire based on your local climate.
  • Assess the Benefits: Remember that factory tires are designed to reduce road noise and vibration specifically for your car's suspension tuning.

Finding the right OEM tires ensures your vehicle maintains its designed performance and safety. When you are ready to replace your worn set, buy automotive tires online for less at SimpleTire to find the perfect match quickly and conveniently.

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