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Old 02-08-2019, 12:44 PM   #1
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Tire Size Question

We picked up our new 2019 Sand Piper 372LOK early in December. It has a hitch weight of 2474 lbs. Unloaded weight of 12962, and a GVWR of 15500 lbs. I'm considering replacing the tire before we take it on its maiden voyage over spring break.

From what I can tell the factory wheels are 16x6. Both Goodyear and Sailun say the wheel needs to be a 6.5" Will that be a problem?

Would going from the OE 235/80-16 to a 235/85-16 with a higher maximum weight rating cause any issues?
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Old 02-09-2019, 04:59 PM   #2
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Quote:
Originally Posted by cstreu1026 View Post
We picked up our new 2019 Sand Piper 372LOK early in December. It has a hitch weight of 2474 lbs. Unloaded weight of 12962, and a GVWR of 15500 lbs. I'm considering replacing the tire before we take it on its maiden voyage over spring break.

From what I can tell the factory wheels are 16x6. Both Goodyear and Sailun say the wheel needs to be a 6.5" Will that be a problem?

Would going from the OE 235/80-16 to a 235/85-16 with a higher maximum weight rating cause any issues?

Tires for RV trailers are fitted to provide 10% load capacity reserves above the vehicle certified GAWRs. That's the minimum requirement recommended from RVIA and what all their members are doing.


With the 16/6 wheels I'm assuming your OE tires are ST235/80R16, LRF. That would be the minimum load capacity for your axles. Anything less than that would be suspect. Anything more might be desirable a couple of years down the road.


The 16" 85 tires are normally about an inch taller than the 80s. The individual tire manufacturer has the ultimate say on tire rim sizes for the tires they build. If they list a range than any size in that range is acceptable. If there is no range than it will be considered unsafe to use anything other than what the tire manufacturer recommends.
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