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Old 04-06-2016, 11:24 AM   #1
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Which tire size - 205/75R15 or 225/75R15?

I'm looking to upgrade my TT tires and wheels from 14" to 15" and am undecided on whether to get 205 or 225 (75R15's). In my case I have ample room for either size. I know the 225's are rated for a higher load capacity. Is there anything I should consider as to highway performance, tire flexing, heat, turn radius problems, etc?
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Old 04-06-2016, 01:03 PM   #2
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To ponder.......RADIAL 857 - Kumho Tire USA, Inc.
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Old 04-12-2016, 10:41 PM   #3
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The question you should be asking is will the new size wheel and tire have proper clearance on your trailer. Without knowing that then the proposed change is not possible. If they will fit then go with the 225 because it will give you more capacity and therefore safety.
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Old 04-12-2016, 11:16 PM   #4
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I could not fit anything larger than a 15 inch 205 on my TT, so I upgraded to a "D" rated tire.
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Old 04-12-2016, 11:29 PM   #5
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Proper trailer rated rims, ( zero offset ) of the correct width as rec-commended by the tire manufacturer, for the size you can fit under without contact, under any load or bounce situation; and installed with metal valves to handle the higher pressures.
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Old 04-13-2016, 10:56 AM   #6
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"In my case I have ample room for either size." As you may see in my original post, I stated that either tire size would work as far as clearance. In the mean time I have ordered 205/75R15, LR-D Maxxis M8008's premounted on new wheels.
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Old 04-14-2016, 07:49 AM   #7
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While we like to think a more robust tire is better, you can reach diminishing returns. That is your axles have a specific weight rating; how much over the axle rating do you need?
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Old 04-14-2016, 09:38 AM   #8
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I believe more plys equal less flats.
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Old 04-19-2016, 07:22 AM   #9
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I just put my first 600 miles on my M8008s (LRD). I've run the 8008s on a smaller trailer and couldn't wait to change out the Towmax on this one. Trailer just tows better now. I was going to go for the LRE but decided to stick with manufacturer recommendation.
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Old 04-20-2016, 05:40 PM   #10
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Hope you ordered a spare tire and wheel too. You don't want to mix 14 and 15 wheels on any axel.
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Old 04-21-2016, 07:25 AM   #11
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Yep, ordered a spare.
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