I put Maxxis load range D tires on my TT last year. They are 15". So far good luck. Took a 2000 mile trip up the east coast in July and they did fine. I am thinking of going with LT's next time for longevity not speed. I don't go faster than 65 anyways.

 

Just posted this in another Carlisle thread here a minute ago:
https://www.ford-trucks.com/forums/1...ng-to-ask.html
Original post:
Carlisle rant - The Garage Journal Board

 

As mentioned earlier tires are a hot topic on the RV boards. Fortunately my trailers have been on the light side (Less than 5k lb, tandem axles) so I have just used truck tires. Most of the Rv boards like the Maxxis tires especially on the big fifth wheelers. Anything made in China doesn't last long.
regards
rikard

 

I went with the Maxxis 8008 as they are an ST RADIAL tire. I have well over 6k miles on them in 18 months. The 5er can us load range D's but I went with E's. I looked at going to 16's but the room just was not there. ST's are made to take turns, and the dragging/skidding which means a stronger sidewall. I know on the RV boards, the only ST tire reccommended is Maxxis. All others get thumbs down.
If you don't have the room to put on 16's and use LT's then go to the Maxxis and get a load range one step higher than reccommended. That is the trend that I am seeing. Oh, and I found my Maxxis 225/75/15's at Discount Tire, out the door with TT&L for $108each. If you go 16's, Michelin Ribs seems to be the LT of choice on the RV boards right now.

 

I just put a set of LT225/75R15 Carlisle Sport Trails (I think), I know they are a LT and are load range E. One thing that I have heard from Gulfstream, when I had a blowout before was that the pin weight was subtracted from the total weight of the trailer when sizing the tires. Makes no sense to me since the traielr weighs what it weighs. Another interesting fact that I have heard from a couple of different RV dealers is that when running the Carlisle tires, always run them at 5psi under the max and you (SHOULD) be ok with them. Just my .02, I've had blowouts with Carlisle and Goodyears.

 

Well when the trailer is sitting alone the total weight is what's on the axles (mostly about 80% of total weight) and on the landing gear (about 20% of total trailer weight). When you drop the pin into the 5th wheel the landing gear weight is transferred to the truck. So the axle weight is still the same, "roughly", I'm sure there could actually be a couple hundred less or more but when we're talking 8,000 pounds it's roughly the same.

 

Don't buy anything from Carlisle Tire. Had them on a fiver, blew 3 and the 4th. had a bulge in it. All new on trailer when bought. They replaced 5 tires and paid for trailer repairs, but the new tires they sent as replacements started to fail within 2000 miles. I now have Goodrich Commercials. Great tires, noticed the difference when pulling right away. Have put 10,000 miles on them, no wear noticeable and the pressure stays constant.