Thread: Rim/tire width
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Old 01-23-2012, 10:10 AM   #18 (permalink)
skyking
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Quote:
Originally Posted by CapriRacer View Post
Thanks for that. I have a question to pose:
I am building a 5th wheel trailer with (2) 2000 pound rated axles, and the common tire size in that situation is ST175/80R-13, with a 24.1" dia. 23.2" loaded height, 1360 LB capacity. I have planned around the ~23.2" loaded height. Other design factors require that I keep the diameter around this value.
I can't find any resistance data on these tires.
The super low crr bridgestone b381's are available in a 185/70R14 with a similar diameter and a 1200 pound capacity.
The trailer's planned load values are closer to 900 pounds per tire, about a 10% cushion below axle rating.
So this tire is slightly wider, but has a lower aspect ratio. Any thoughts? Are trailer tires low crr to begin with?
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