What is the best way to get all my tires changed?

[KausalityKid]

My 41 foot 2019 380TH Montana high country has six tires, three on either side although all the manufacturers pictures and description say it’s only a two axle model with 4 tires. I am a newbie in this is my first RV so I don’t know what I don’t know. I have taken it out five times of distances no more than 2 Hour drives and have had blowouts twice. The first blow out was a freakish accident. The second one I have no idea. I want to swap all six tires and two spares for 12 ply new tires. I don’t want to go to a dealer because I know I will pay a premium for the tires. I was thinking of changing them all myself, but that task is to daunting. Removing all six and the one blowout spare that I have, Plus finding a rim for the second spare that I want, taking them to the tire shop and getting them replaced, then mounting them all back on it seems probably too much of a job for me alone.

Any suggestions on where to buy the tires at the best price?
Any suggestions on how to get them all swapped out?

 

[Carl n Susan]

What size and ply tires are on there now? What is the year/month date of those tires (you don't want anything more then 4 years old). Given you have 6 tires I assume they are likely "E" or possibly "F" rated. "G' rated tires would be a definite overkill.

The are many places to buy tires. Online sites like Simpletire.com, TireRack.com or even Walmart will deliver directly to you. Big O, Discount Tire, aka Americas Tire, stores have reasonable prices on a variety of tires. Shop online to find what you want (stick to known brands with a good rep) and the price you want to pay.

For installation, you have two choices. Take the RV to a dealer and have them install the tires (even if you didn't buy from them) is the easiest route. Alternatively, jack up one side of the RV (you have the electric leveling system which probably isn't enough to lift, and hold the RV off the ground), put jack stands under the frame, and remove three wheels. You will want to take them to a tire dealer and have them mount and balance them (Americas Tire will do this for tires you bough elsewhere). When done with one side, repeat on the other. You don't want to try and demount/mount tires yourself.

Personally, I would find the tire I want. If it is at a tire shop, let them install. If they are shipped to me, take them and the RV to a tire shop who will install and balance for you. You are going to wind up a tire shop for mounting so the little additional cost to have them jack up the RV, remove and reinstall the wheels is minimal.

 

[Daryles]

Just an FYI.
In the owners manual it says NOT to jack under the axles (possibly a good way to bend them out of alignment. Make sure they jack under the frame.
Many here recommend Sailun G rated tires, but you have to have rims rated for 110psi. There is a
(110) stamp in the inboard side of the rim.

 

[mlh]

If your tires are 110 pound tires don’t inflate them on 80 pound rims over 80 pounds.
Lynwood

 

[phillyg]

When I ordered thru simpletire.com, they had a couple of local installers I could choose from. I had the tires drop-shipped to the one I chose, and they had enough space for the FW so I just drove it over. If you can't find an installer with a big enough space, you could jack up one side at a time and deliver the tires/wheels to your installer.

 

[bobbecky]

The sales brochure for the 2019 HC shows he should have 110 psi wheels already installed.

 

[R.S.O'Donnell]

My 41 foot 2019 380TH Montana high country has six tires, three on either side although all the manufacturers pictures and description say it’s only a two axle model with 4 tires. I am a newbie in this is my first RV so I don’t know what I don’t know. I have taken it out five times of distances no more than 2 Hour drives and have had blowouts twice. The first blow out was a freakish accident. The second one I have no idea. I want to swap all six tires and two spares for 12 ply new tires. I don’t want to go to a dealer because I know I will pay a premium for the tires. I was thinking of changing them all myself, but that task is to daunting. Removing all six and the one blowout spare that I have, Plus finding a rim for the second spare that I want, taking them to the tire shop and getting them replaced, then mounting them all back on it seems probably too much of a job for me alone.

Any suggestions on where to buy the tires at the best price?
Any suggestions on how to get them all swapped out?

When we were at the Les Schwab in Crescent City, California getting a truck tire patched they had a 5th wheel RV outside doing the tires with portable jacks. The exact route I would take.

 

[KausalityKid]

Thanks, I’ve been told by various people to go 12 ply and I’m pretty sure they are an F. I’m glad my assumption that to have a dealer put them on meant I needed to buy from them. Unfortunately it’s around midnight and cold so I won’t run out there right now to check the letter. I think I’ll buy 6 new 12 ply quality tires, a rim, and put two of the current tires on my one blown spare and the additional rim so that I always have two spares.

 

[KausalityKid]

Thanks. Yes, I use the frame, not an axle.

 

[KausalityKid]

Great alternative. I’ll check into that

 

[KausalityKid]

That's interesting. They are all 80 psi. Maybe that's why I have six tires instead of four, but this is a 41', and I think 17,000 lbs ( I need to check on that again, I haven't loaded it up yet)

 

[KausalityKid]

This is what the tire that blew was:

Manufacture: Rainier ST
Series: ST 235/80R16
12 PR load range F tubeless
Max load single 3860 pounds at 95 psi cold
Max load dual 3420 pounds at 95 psi cold
Tread 2 steel +3 polyester +1 nylon
Sidewall 3 polyester

 

[twindman]

Don't know if mentioned elsewhere here, but ST tires have a speed limit of 60 or 65 mph. Otherwise, seems like you had plenty of tire - 3 axles at 6800 lb each.

 

[foldbak]

Don't know if mentioned elsewhere here, but ST tires have a speed limit of 60 or 65 mph. Otherwise, seems like you had plenty of tire - 3 axles at 6800 lb each.

I hate tires. So I googled the speed rating for the factory Rainier's. I have the same tire 10 months old with about 5000 mile on them. I figured to get at least a year out of them. My average speed is around 65 but I have exceeded it on occasion


My point is according to Google you get different answers
https://www.tredittire.com/tire/rainier-st/

• ST tires are designed specifically for boat, car and utility trailers. They are built to carry heavy loads on non-powered axles and are rated for a maximum speed of 65mph. Their stiff sidewalls help prevent your boat/trailer towing package from swaying
• 
  How fast can you go on ST tires?
  The rating ST, or special trailer tires, can handle 80 mph and beyond. These can withstand higher speeds while carrying heavy loads and, just like typical trailer tires, come with stiff sidewalls to reduce trailer sway.Sep 4, 2021

Just an example that just because you saw it on the internet it must be true....

 

[Monte421]

The Rainier's that were on mine were 81 mph rated.

 

[JABURKHOLDER]

I purchased my 14 ply Goodyears from a Goodyear commercial garage. They also installed them. They have all the equipment for large vehicle/trailers.

 

[KausalityKid]

I never heard or saw anything that said not to take them over 60 mph, I have had it up to 70

 

[KausalityKid]

If your tires are 110 pound tires don’t inflate them on 80 pound rims over 80 pounds.
Lynwood

how can I tell what my rims will take? These are the tires that are on it and I am just going to buy the same from simpletire.com. Not Reniers, but a decent brand that matches my series. ST 235/80R16. The ones I’m getting say a psi of 100 and high speeds

Manufacture: Rainier ST
Series: ST 235/80R16
12 PR load range F tubeless
Max load single 3860 pounds at 95 psi cold
Max load dual 3420 pounds at 95 psi cold
Tread 2 steel +3 polyester +1 nylon
Sidewall 3 polyester

 

[mlh]

It should be stamped on the back side of the rim.
Lynwood

 

[Mosnowman]

I've got 4 Sailun S637 (Trailer) ST235/85R16 132/127L G Trailer tires arriving tomorrow direct from WalMart on line. I paid $172 a piece x 4. My plan is to take them and the fiver to a big truck place that does tires. Local RV dealer doesn't deal with tires...small outfit.

One question I have is how do you know what size metal valve stems to buy? I want to switch to metal, but not sure if it is a common issue that the truck shop will be able to easily handle. I also am having a TPS system put on and hopefully they can do that too at the same time. I too am a newbie, so hoping I'm not messing up.