Quote:
Originally Posted by c2gerhardt
These numbers are well below the rated 7000lb axles with Carlisle Tires at 3520lbs each.
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I don't think your axles are rated at 7000#. Keystone would have to inform NHTSA (in writing) which load capacity ST tire they used as Original Equipment on 7000# GAWRs. It's common practice for trailer manufacturers to derate axles to make all weights fit the building specs. But, 16" ST tires have three distinct load capacities at the LRE weight rating. 3420#, 3500#, and 3520#. If a trailer actually has 7000# GAWR axles only the 3500# & 3520# tires fit the specs. To prevent misapplications of the 3420# tires on those axles the vehicle manufacturer MUST identify - by load capacity - which tires are suitable for fitment. It's much easier for them to derate the axles to something like 6750# which makes all load capacities acceptable under the current regulations.
Note: When such a tire (ST235/80R16E) is built with more than one load capacity, for the identical size, and unidentified as such by the vehicle manufacturer, all load capacities default to the lowest amount.
CW