I woundup calling Les Schwab's headquaters today in Oregon. They have over 400 stores throughout the West.
Last year they sold 24,000+ TOWMAX 225 x 75 x 15 ST trailer tires Load Range D (2540@65psi). In 2008 they had a little over 100 that were brought back for misc warrnty issues.
Man I spoke with informed me that TOWMAX recently came out with a 10Ply/Load Range E in the 225 X 75 X 15, good 2830#@ 80psi. Schwab sells these 10 ply's for $115 each (plus mount/balance)
I also spoke with a tire employee at COSTCO about BFG Commercial T/A All Seasons in 225 X 75 X 16 that are 29. 4 inches dia 8. 8 wide on a 6" Rim. Has anybody seen or tried 16" wheels/tires on a Pace, Haulmark, box/cargo trailer with 6 lug, 5000# axles... ... I dont have price quote on these tires, but approx $135 ea. Also there is not a big selection amongst vendors on 6 Lug 16" x 6"/7" Aluminum wheels ??????
Anyway, I'm leaning towards the 10Ply 15" Towmasters and new Enkei Motorsport Wheels that are made for Pace American.
I have read pages of threads from a variety of forums on the net. The only conclusion I did find was that many of the 16" fifth wheel R/V guys went to the $$$ Michelin XPS Rib Tire. I believe these have what is called a ALL STEEL CASE. These are not offered in 15" sizes.
Once again my enclosed Pace American 20' Shadow GT is 10,000 GVW
Thanks for reading and replying
Chuck Sharin
Hi Chuck,
IMO, you need to take the trailer to a scale and weigh each axle and each tire (if possible). You will find that the tire that is directly under the fridge and pantry and/or fresh water tank is carrying the most weight, especially when you are leaving home to go camping with all of the food, drinks and water.
You will most likely find that the Load range D (2540 lbs) tires are barely rated to carry that one heavy spot on your trailer.
For some of us, we would love to go to the 16" wheels/tires, but our trailers don't have enough clearance. I could MAYBE fit a LT225/75-16 XPS Rib on my trailer but the rated capacity would only be 2650 or so lbs and it cost me over $1000 for the wheels and tires. Each XPS Rib is over $200 !!
I know I will get comments back, but I went with the ST225/75-15 E Carlisles from Americas Tire. These are rated for 2830 lbs and only cost approx $115 each.
I've been running these now for 2 solid seasons (starting my third in May... ) and have over 6000 miles on them. My trailer weighs 11k fully loaded with 4. 2k on the rear axle and 3. 8k on the front axle.
Also, you are correct that there are not alot of 16" x 7" (6 lug x 5. 5" spacing) wheels with "0" offset. You need "0" offset wheels on trailers to keep the bearings properly loaded. I have found one UGLY steel wheel... but no alum alloy...
You are on the right track with "E" rated TOWMAX's from LS. Both LS and AT stand behind their tires...
You can see my wheel/tire combo in my photo gallery. I got MB Type 72 wheels with the Carlisle "E" rated tires.
My best friend has the exact same RV as I do, same wheels and same tires (he bought from Les Schwab at the same time as he didn't have an America's tire near him in St Helens) He has at least 3000 more miles on his Carlisles and isn't nearly as anal as I am about keeping pressures to 80psig and has had ZERO issues...
Sorry for the long winded response.
Regards,
Louis