I'm looking at these 27" tires on Ebay and trying to figure out how they describe the off sets. What does it mean when they say fronts are 4+2 and rears are 3+5 I think I only want to widen 1" per side. Below is the email they sent me.


Dear tx1tek,

We have sold lots of these for the RZR. The fronts are 4+2 and the rears ITP made for the RZR are 3+5 to get it more stable, but you can always do their 5+3 as well if you don't want to make it 2" wider per side. Let us know if you have any other questions and we will be happy to help. Also, ITP raised their pricing March 1st, we will likely be following suit on Sat so dont miss these for this pricing.

I'll take a crack at it. What they are describing is the distances from the wheel rim to the mounting surface. For the rears, when they say "3+5" what they mean is that the mounting surface is 3 inches from the inside of the wheel and 5 inches from the outside. This make the wheel and 8" wheel, which is commonly used on the rears.

As for making the RZR more stable, if you either add spacers, or use wheels with more negative offset, the center point of the wheel (and tire) will be moved outward (away) from the vehicle. This gives it a wider stance and makes it more stable.

Offset is calculated by taking the distance from the inside rim of the wheel to the mounting surface (the first number, also called backspace) and subtracting the distance from any rim to the center of the wheel (not the mounting surface). In this case this is 4 inches, or half the width. In an equation it looks like this:

Offset = Backspace - (Total width/2)

In your case the numbers for the back are:

Offset = 3 - (8/2) = 3-4 = -1

So the backspace is -1 inch. Since they also said this would make each wheel stick out two inches more (per side), then they're saying the stock offset is +1 inch. The difference between stock and aftermarket is 2 inches (+1 inch - (-1 inch) or two inches. Negative offset makes the wheel stick out more, positive makes it stick out less. Old school "deep dish" wheels have very large negative offsets.

Believe it or not, I think that's the quick answer. Bottom line is if you want a wide stance, get a wheel with a smaller first number. Also, if you ride in the sand, making the fronts wider also makes them throw more sand at you. Just part of the plan if you give the front a wider stance.

Nice job rzrnaz, nice and simple

Actually, I just found at least one typo. I capitalized the incorrect word:

I'll take a crack at it. What they are describing is the distances from the wheel rim to the mounting surface. For the rears, when they say "3+5" what they mean is that the mounting surface is 3 inches from the inside of the wheel and 5 inches from the outside. This make the wheel and 8" wheel, which is commonly used on the rears.

As for making the RZR more stable, if you either add spacers, or use wheels with more negative offset, the center point of the wheel (and tire) will be moved outward (away) from the vehicle. This gives it a wider stance and makes it more stable.

Offset is calculated by taking the distance from the inside rim of the wheel to the mounting surface (the first number, also called backspace) and subtracting the distance from any rim to the center of the wheel (not the mounting surface). In this case this is 4 inches, or half the width. In an equation it looks like this:

Offset = Backspace - (Total width/2)

In your case the numbers for the back are:

Offset = 3 - (8/2) = 3-4 = -1

So the OFFSET is -1 inch. Since they also said this would make each wheel stick out two inches more (per side), then they're saying the stock offset is +1 inch. The difference between stock and aftermarket is 2 inches (+1 inch - (-1 inch) or two inches. Negative offset makes the wheel stick out more, positive makes it stick out less. Old school "deep dish" wheels have very large negative offsets.

Believe it or not, I think that's the quick answer. Bottom line is if you want a wide stance, get a wheel with a smaller first number. Also, if you ride in the sand, making the fronts wider also makes them throw more sand at you. Just part of the plan if you give the front a wider stance.

Thanks RZRNAZ. I don't know why they don't just put it in simple terms like "This wheel is a 8+2, or 2 inches wider than the stock 8" wheel." Thanks for clearing that up for me.