The Ultimate Fitment Guide.

Whether you’re pinning it in an Outlander or sending it in a RZR, getting your tyre and rim setup right is mission-critical. Use the guides below to decode the math behind ATV & UTV wheel specs so you can upgrade your stance without the guesswork.
25x8-12 tire size diagram illustrating height, width, and wheel diameter measurements with labeled dimensions.

How to Read Your Tyre Size.

Most off-road tyres use a three-number system (e.g., 30 x 10 - 14).

  • Height: The first number is the total tyre height. Larger tyres give more ground clearance but may require a lift or arched arms.
  • Width: The middle number. Wider tyres offer more grip in the bog but can make steering heavier.
  • Rim Size: The final number must match your wheel diameter exactly to seat the bead.
Technical diagram illustrating wheel offset measurements with labeled axle and wheel halves.


Widening the Track: Offset Explained

Choosing the right offset is the secret to a better-handling machine. The numbers you see (like 5+3) represent the Inner Wheel Half and the Outer Wheel Half. To find your total wheel width, you just add them together.

  • The 4+4 (Zero Offset):
    The hub sits right in the middle. This is a balanced setup that provides a standard track width while giving you a even look on both sides of the wheel.
  • The 5+3 (Positive Offset):
    The inner half is larger, meaning the wheel is sucked inward toward the machine. This keeps your ATV or UTV narrow—ideal for tight woods and meeting stock width requirements, but it offers the least amount of clearance for big suspension upgrades.
  • The 3+5 (Negative Offset):
    This is how you get that wide, aggressive stance. By having a larger outer half, the wheel is pushed outward away from the hub. This is the go-to for maximum stability on side-slopes and provides the vital clearance needed to run larger tyres and arched A-arms without rubbing the frame.

CRP Tip: Always remember that the Inner Half is listed first. If you want a wider machine that’s more planted in the corners, look for a lower first number and a higher second number!
Technical diagram illustrating three different lug patterns for bolted circular components.

Know Your Pattern: Bolt Patterns (PCD)

Before you drop money on new rims, you need to know your Stud Pattern (also known as PCD). This is the measurement between the studs on your hub. Getting this right is the difference between a perfect fit and a wheel that won't even slide on.

  • 4-Lug Patterns (The Most Common): To find your measurement, measure from the center of one stud to the center of the stud directly opposite.4/110: The standard for most Honda, Yamaha, and Suzuki ATVs.4/137: The go-to for Can-Am and Kawasaki machines.4/156: The common fitment for Polaris ATVs and UTVs.
  • 3-Lug & 5-Lug Patterns:
    These are measured differently. You measure from the back of one hole to the center of the furthest hole.3-Lug: Common on smaller youth quads.5-Lug: Found on some specialized heavy-duty UTVs and older sport quads.

CRP Pro Tip: Don't guess! Even if two machines look the same, manufacturers often change bolt patterns between models or years (especially on newer UTVs). Always measure twice so you only have to buy once.