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Increasing Tire Size on 2017 Grand Design Imagine 2150RB


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.


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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