Trailer Tires

[HHR]

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.

 

[lostcreekranch]

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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[adirondackmtnman]

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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[Diamondpilot]

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

 

[adirondackmtnman]

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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[daugen]

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.

 

[rd_macgregor]

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(?).

 

[Diamondpilot]

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(?).

Yes, 33" tall or there abouts.

Chris

 

[HHR]

To convert millimeters to inches, simply divide by 25.4.