Replacing a 185/70D13 Trailer Tire with a ST185/80D13 Trailer Tire On The Same Wheel

Question

Question:

Hello, Can I use an ST185/80D13 tire with my current rims which currently have 185/70R13 sized tires? Your help would be much appreciated..

asked by: Jeremy

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Expert Reply:

The 185/80D13 should fit the same wheel as the 185/70R13. A 185/70R13 is not a typical trailer tire size. The difference between these tires is that the 185/80D13 is just over 1/2 inch bigger in overall diameter. This means the tire would sit 1/4 inch closer to the fender well. As long as the tire will not come into contact with the fender, a ST185/80D13 tire should work well for you.

The ST185/80D13 tire that we offer, # AM1ST79, fits 13 inch x 4-1/2 inch, 13 inch by 5 inch, and 13 inch by 5-1/2 inch wheels.

expert reply by: Victoria B

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Answer 1

The closest tire size we offer to the ST180/70R13 tires on your trailer is the ST175/80R13 which will be about 3/4" taller than your current tires, and just under 1/2" narrower. I recommend the Karrier ST175/80R13 Radial Trailer…

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Answer 2

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13…

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Answer 3

You will more than likely be just fine replacing your 175/80R13 tires on your boat trailer with ST185/80R13 tires like the Kenda Karrier ST185/80R13 Radial Trailer Tire - Load Range D #AM10208 due to them being so close in size. The ST185/80R13 will…

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Answer 4

It is for the type of tire. Any tire with an R is a radial tire. If you see a D instead, such as the Loadstar ST185/80D13 Bias Trailer Tire w/13" White Modular Wheel - 5 on 4-1/2 - Load Range D, part #AM3S333, it is a diagonal or bias ply tire.…

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Answer 5

13 inch trailer wheel/tires like the size 185/80-13 like part #AM1ST79 are rated for up to 81 MPH. Most trailer tires are only rated for 65, so if 65 is the limit you have then you'd be good.

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Answer 6

In height or total diameter, a 185/80-13 and 175/80-13 like part #AM1ST77 only differ by about 5/8 of an inch. The 185 would have a diameter of 24.65 inches while the 175 would have a diameter of 24.02 inches. The section width, or thickness of the…

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Answer 7

I agree it is the right time to upgrade to a Lithium charger/converter as not all are Lithium compatible. I recommend using the Progressive Dynamics Mighty Mini AC/DC Panel and Converter/Smart Charger - 60 Amp #PD4060K which is a replacement for your…

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Answer 8

Brake systems are not dependent on the hub bolt pattern. So you can use the Electric Trailer Brake Kit #AKEBRK-7-SA for 12 inch hub/drums or #AKEBRK-35-SA for 10 inch hub/drums. Then use #10-1-1 wire sold by the foot for your brake magnet wiring.…

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Answer 9

The correct replacement for a Demco Master Cylinder 05680-C is the Replacement Master Cylinder part #5650. I spoke with Demco to confirm this for you.

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Answer 10

The correct replacement master cylinder kit we have for your Demco setup is the part #DM5918 which comes with the lock out replacement.

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Answer 11

You will need the Red LED Trailer Clearance or Side Marker Light #328-K-52 or Amber LED Trailer Clearance or Side Marker Light #328-K-51 for your 2018 Forest River Sunseeker motorhome. These lenses have the same Top Command SAE-AP2-16 markings on the…

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Answer 12

I can end this debate for you real fast! Trailer tires, which will have an ST in front of the size, should always be inflated to the maximum psi indicated on the tire. Trailer tires usually do not have a recommended and maximum psi indication so I am…

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Replacing a 185/70D13 Trailer Tire with a ST185/80D13 Trailer Tire On The Same Wheel

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