Understanding ATV Tire Sizing: A Complete Guide

Choosing the right ATV tires is essential for performance, handling, and safety. But to make the best choice, you need to understand how ATV tire sizing works. In this article, we’ll break down ATV tire sizes, how to read them, and what each number means for your ride.

How to Read ATV Tire Sizes

ATV tire sizes are typically displayed in one of two formats: standard (imperial) or metric.

Standard Tire Size Example:

25x8-12

Let’s break it down:

• 25 = Overall tire height in inches (from ground to top of the tire)

• 8 = Tire width in inches

• 12 = Wheel (rim) diameter in inches

This format is the most common in North America and is used on most OEM and aftermarket ATV tires.

Metric Tire Size Example:

205/80-12

This follows the automotive-style format:

• 205 = Tire width in millimeters

• 80 = Aspect ratio (percentage of sidewall height to width)

• 12 = Wheel diameter in inches

  
  

While less common, you may see this on European models or some utility ATVs.

Why Tire Size Matters

Your ATV’s handling, ground clearance, and power delivery are all affected by tire size.

Height (First Number)

• Taller tires give more ground clearance and better traction in rough terrain.

• However, they may reduce acceleration and put more strain on the drivetrain.

Width (Second Number)

• Wider tires offer more surface area for traction, especially in mud and sand.

• Narrower tires are better for tight trails and require less power to turn.

Rim Size (Third Number)

• This must match your wheel exactly.

• Larger rims usually accommodate lower-profile tires and are more common in sport applications.

Front vs. Rear Tire Sizes

Many ATVs use different sizes for the front and rear:

• Front tires are usually narrower and shorter, which helps with steering precision.

• Rear tires are wider to provide better traction and support power delivery.

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Always follow your ATV manufacturer’s recommendations when replacing tires, especially if you have 4WD, to prevent drivetrain issues.

Can You Change ATV Tire Sizes?

Yes, but with caution. Here are a few tips:

• Stay within 1–2 inches of the original height to avoid clearance and gearing issues.

• Make sure the new tire fits your rim width and fender clearance.

• If you go bigger, consider gear reductions or clutch kits to compensate for the added load.

  
  
  
  
  
  
  
  

Understanding ATV tire sizing isn’t just about numbers—it’s about optimizing performance, comfort, and safety. Whether you're tearing through trails, working on the farm, or hitting the dunes, choosing the right size ensures your ATV is ready for the challenge.

To find the right tires for your ATV, visit lionparts.com