Trailer Tires

   / Trailer Tires #61  
So I have a question re; size. My fifth has 235/80/R16 and the Costco Greenball Towmaster Radial is 235/85/R16 @ $145 eac. Can I use the 85 series in place of the 80?
You can use them. The only difference is that they are 1 inch taller.
 
   / Trailer Tires #62  
You can use them. The only difference is that they are 1 inch taller.

Isn't the 80 or 85 tread width?

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   / Trailer Tires #63  
Isn't the 80 or 85 tread width?

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80 or 85 is the aspect ratio. The tread width would be 235mm, and the measurement rim-to-tread is whatever % the aspect ratio is. In the case of 80, would be 188mm.

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   / Trailer Tires #64  
80 or 85 is the aspect ratio. The tread width would be 235mm, and the measurement rim-to-tread is whatever % the aspect ratio is. In the case of 80, would be 188mm.

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Yes, 100% correct.

Tires are measured in MM. So let's take a 285/65/18 like I have on my truck.

The 285 is the tread width in MM. The 65 is 65% of that 285 MM for sidewall height. And the 18 is 18" rims.

Chris
 
   / Trailer Tires #65  
Yes, 100% correct.

Tires are measured in MM. So let's take a 285/65/18 like I have on my truck.

The 285 is the tread width in MM. The 65 is 65% of that 285 MM for sidewall height. And the 18 is 18" rims.

Chris

Unless of course we're dealing with english units such as a 35 10.50 r16, but I digress...:)

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   / Trailer Tires #66  
that tiny bit of increased diameter shouldn't be an issue if you replace all four tires at one.
Not sure I'd want to mix the sizes though.
 
   / Trailer Tires #67  
Yes, 100% correct.

Tires are measured in MM. So let's take a 285/65/18 like I have on my truck.

The 285 is the tread width in MM. The 65 is 65% of that 285 MM for sidewall height. And the 18 is 18" rims.

Chris

Just to see if I'm getting this right...your 285/65/18 tires would then have a diameter just a hair under 828mm mounted(?).
 
   / Trailer Tires #69  
To convert millimeters to inches, simply divide by 25.4.
 

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