Tire Size Q&A

P235/60R18 tire size for Nissan Rogue

by Annette

I have a 2012 Nissan Rogue.

Can I go from P225/55R18 to P235/60R18 tires?

Editorial Comment:

Use our Tire Size Calculator to compare the differences in these two tires.

At first glance this does not seem like a good swap because you are increasing both the width and sidewall height of the tires. The quick, rule-of-thumb method of judging swaps is to look at the changes in the numbers in the tire's size. If one of the numbers increases, another one of the numbers needs to decrease in order to maintain the same overall diameter. If there is a change of more than 2% in overall diameter we generally do not consider that to be a good match.


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Sizing down from 245/75R16 to 225/60R16

by Mano
(Rome, Ga 30161)

So I need some new tires and my father has some 225/60R16 that are new. He is wondering If they would work on my 96 Tahoe.

Answer to Mano's question about down sizing

If you would use our Tire Size Calculator you could compare these two sizes to see what the effect would be.

The essential effect of making this change is that you will lose clearance height in your vehicle ... the 225/60's are almost 4 inches smaller in diameter which means your vehicle will be nearly 2 inches closer to the ground.

If you are driving on roads and in areas where this much of a loss in clearance won't cause you any problems then you might continue to think further about this swap.

Another consideration is that because they are quite a bit smaller (more than 12%) you will have an appreciable error in your speedometer reading, and you will use that much extra fuel. Will you be pleased to have to pay almost 13% more every time you pull up to fill up with gas?

Another thing you need to think about is the speed and load rating of the tires your dad is offering. If their rating is less than what your Tahoe requires, you'll be adding an increased safety hazard to the mix of things that you'll be faced with.

Personally, I wouldn't recommend this swap.


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P255/50R18 on 2006 Mitsubishi Eclipse

by Chris

I wanted to put a bigger tire to put all the way around on my 2006 Mitsubishi Eclipse GT, I just wanted to make sure it would not hurt this vehicle in any way?

Comments for P255/50R18 on 2006 Mitsubishi Eclipse

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Larger Tires for Eclipse
by: Tire Guy

The OEM size using 18"wheels for this is 235/45. If you choose a 255/50 tire you are not only making it wider but are increasing the sidewall height. The normal approach if you wish to mount a wider tire is to reduce the Aspect Ration, not increase it so that you conserve the same over all tire diameter.

If you use the tire you propose you will definitely notice an error in your speedometer reading and may have problems with the tires rubbing or interfering with area of the body. The only way to discover this is by trying a test fitting. Do not rely on the reports of other users in this regard since you own vehicle may have peculiar clearances because of mechanical changes or work that has been done which other vehicles have not.

The differences in sizes is 6.51% and we generally do not recommend a difference of more than 2% when swapping to alternate sizes.


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Ideal tyres 2004 Nissan Xterra

by Niminye Amatus

Three questions:

1. Is it the case that 2004 Nissan Xterra car tyres must be on rim 15? I.e. 265/65/r15 or 265/70/r15.

2. Can you fit rim 15 or 16 or 17 on this car model?

3. Please recommend ideal tyre profile and rim size

Editorial Comment:

As far as I can determine by searching for tires which are sold by TireRack.com the original equipment size of the 2004 Nissan Xterra SE 4X2 V6 is 265/65R17. This means that the car was equipped with 17 inch rims in the US market, but it may have been different in other countries.

Use our Tire Size Calculator if you wish to discover what are the equivalent sizes to use when different sized rims are used.

As a rough rule of thumb, whenever you increase the rim size, you need to compensate by decreasing the sidewall height by adjusting the width and the Aspect Ratio. This is what the calculator does for you to make it easier.

Keep in mind when you use the calculator, or any other way of determining the tire size that the end objective to to keep the total diameter of the new tire as close as possible to the diameter of the original tire when it is installed and inflated to the correct pressure.

Another consideration to remember is that different wheels can only fit if the bolt patterns of the new rims match the studs on the car. Different car makes have different bolt spacing which is sometimes difficult to see with the naked eye but is quite evident if the rims are difficult to install on the vehicle.

As a further answer to what you have asked, tirerack also lists larger rim sizes for the vehicle I looked at from 18, 20 and 22 inches. If you vehicle came with 15 inch rims, then it is obvious that any size rim from 15 inches and up will serve.

What is sometimes a problem is putting on smaller rims because there may not be enough space inside the rims for the brakes or other parts of certain cars to work properly.

I would not care to recommend an ideal rim or profile since the is often very much a matter of personal choice but if you don't have a strong feeling the best policy is to go with what the manufacturer of the car provides as standard equipment.

I hope this information helps.


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different rims and winter tires on my car

by Joel

I have a 2004 VW Passat and came across a set of rims and winter tires. The tires I have right now on my passat are 195/65/R15.
The rims and tires I want to put on are 185/ 60/ R15. My question is can I do it?

Editorial Comment:

First thing to take care of when considering different rims is if they have the right bolt configuration for your car. If the number and spacing of the bolt holes in the wheels don't match there's nothing more to consider. They won't work.

Next you need to compare the tires. Use our Tire Size Calculator to compare the two different sizes. Just at a quick glance I can tell you that the 185/ 60/ R15 tires will fit but they will be smaller thereby giving you less clearance. Especially for winter driving this might be important for you.

You also need to look at the speed and load ratings to see that they are at least as much as your original tires. It doesn't hurt if they are over rated, but you are assuming an important safety risk if your new tires are rated lower that what your car is designed to use.


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