Best Replacement Tire For A 125/80R13 Tire On A Boat Trailer  

Question:

Expert Reply:

Hi Clyde!

That 125/80R13 is definitely an odd one that I can't say I have run into before. The closest options we have to this will be the 175/80R13, which may work for you, but I strongly encourage you to take a measurement before just going with it.

What you will need to measure is the clearance between the sidewall of your current tire to the closest part of the frame or fender it sits in. The 125/80R13 tire has a width of 4.9" and the 175/80R13 tire will have a width of 6.8", so just about 2" wider. This will mean it will be just under 1" closer to the frame/fender once installed. You technically want around 1.5" of clearance there with everything installed (see include image), but that is a rough estimate and if you have a bit less, it isn't the end of the world or anything like that.

If you will still have room for the wider tire, I recommend one of the following options:

Kenda Karrier ST175/80R13 KR53 Radial Trailer Tire - Load Range C # KE25TJ
Kenda Karrier KR35 ST175/80R13 Radial Trailer Tire - Load Range D # KE78KV

These have a very similar tread pattern and the same speed ratings, but the Load Range D option will have a higher capacity at 1,650 lbs when at 70 psi (the Load Range C option will have 1,360 lbs when at 50 psi). You will just need to choose the option that best matches your load. I have also had very good luck with the Kenda Karrier line of tires and they tend to be the ones I recommend the most. They have very good longevity and traction, so they are highly recommended.

What kind of boat do you carry on your trailer? And where do you typically take it out?

expert reply by: Lazer S

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Tire Clearance Measurements
(click to enlarge)