Increasing Tire Size on 2017 Grand Design Imagine 2150RB

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Question:

I am going to replace the tires on our 2017 Grand Design Imagine 2150RB. The trailer currently have Westlake ST205/75R15 Load Range D tires. I was wondering if there would be a problem with replacing the current tires with a Westlake ST225/75R15 Load Range E tire? I called Grand Design and they were no help. I have 2 1/4 inch clearance from the top of the current tire to the under pinning of the trailer. Thank you for your time.

asked by: Robert W

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Expert Reply:

Going with the larger diameter 225/75-15 tires would move the top of your tire around a 1/2 inch closer to the underside of the trailer. Since we usually like to see at least 3 inches of clearance with the trailer loaded per usual I really couldn't recommend increasing the tire size.

The 2017 Grand Design Imagine 2150RB has a GVWR of 6695, so the combined 8600 lb load rating of your current tires provides plenty of excess capacity.

If you were simply needing new tires and figured a little extra wiggle room in the capacity would be a good thing, you're not wrong. As long as you keep your tires inflated to the pressure listed on the sidewall, don't overload your tire's capacity and don't exceed the tire's speed rating you should get plenty of life from your current Westlake tires. If you were needing replacements, we now offer the Taskmaster Provider in 205/75-15 in load range D with a per tire load range of 2150 lbs as part # TR20515D. The Provider is a high quality tire with a speed rating of 81mph.

I've linked you to our series of help articles that will tell you all that you'll want to know about trailer tires.

expert reply by: Mike L

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Answer 1

Remove the locknut from the cable housing assembly of the #34466N11AB96GMA. Feed the cable through the mounting bracket or hold in the wall of chassis. Feed the locknut back over the cable and fasten securely to the backside of the bracket or wall.…

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Answer 2

I can definitely help and point you in the right direction. Both brands make a great quality air bag kit. Personally I prefer the Firestone Ride-Rite #F2709. The air bags themselves are known to be more durable than others. They can hold more PSI…

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Answer 3

Trailer tires actually don't typically wear out before they need to get replaced. Typically they get too old and that's when it's time to replace them. Most trailer tires get 4-6 years of life from date of manufacturer before they start…

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Answer 4

If you went with the next larger 15 inch trailer tire size of 225/75-15 in place of what you currently have and went with a higher Load Range which calls for higher PSI you'd gain about half an inch overall. For that I'd recommend the…

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Answer 5

There are several reasons a tire might blow out. For instance, if a tire is inflated to more or less than its maximum air pressure (which will be listed on the sidewall of the tire) the tires, this can potentially cause tire failure. Inflating tires…

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Answer 6

Going to a tire with a higher rated load range will mean you will need a higher psi rating. The problem with going to a higher rated tire is that it may result in a stiffer ride. For example, a Load Range E tire like part #TR225LRE is rated for a…

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Answer 7

The Westlake ST225/75R15 Radial Trailer Tire #LHWL304 will be an ideal upgrade for your current tires. This will have an E load range, which puts it up to 2,830 pounds at 80 psi. This is also a radial tire, which will run cooler than a bias ply…

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Answer 8

The Provider #TR225LRE is manufactured in China, as are most tires these days. Even though they are not made in the USA, they are a great tire with great reviews. We used to carry Goodyear tires that are made in the USA, but the range of available…

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Answer 9

Going to the next larger tire size of ST225/75R15 would certainly be possible unless your fender and frame clearances are super tight on your trailer currently. You would end up with roughly 3/4 of an inch less of fender clearance and the tire will…

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Answer 10

Larger wheels and tires for trailer generally have higher towing capacities as they have more material to spread out the weight and because the manufacturers know that the larger sizes are typically needed for larger trailers which weigh more so they…

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Answer 11

Regardless of whether your tires are inflated with nitrogen or compressed air, the recommended tire pressure is the same. We recommend that all trailer tires be inflated to the max psi stated on the sidewall of the tire, which, for this Westlake…

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Answer 12

Trailer tires like the Westlake ST205/75R14 Radial Trailer Tire #274-000012 are not given heat ratings. The heat ratings are something that is given on passenger car/truck tires as a requirement by government agencies. Trailer tires are not subjected…

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Increasing Tire Size on 2017 Grand Design Imagine 2150RB

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