I have a 2010 Montana 3400RL with a total (ship+max carrying-tongue)weight of 13540 pounds and have been using GY Marathons 235/80R16 and blowing out tires and damaging sides of RV. I would like to upgrade to a better tire ( maybe a G rated tire or an LT tire but do not know which. Also how can I find out what pressure my rims will take in the tires. Montana will not tell me the pressure rating of my RIMS.

my new rims had it stamped inside you would have to remove the tire to see it. Probably #85

What pressure do you actually need in a G-rated tire? I'm asking because I put one Sailun G-rated tire on my Hitchhiker-II after a blowout in May. I'm running 80 psi in the Sailun, same as the other tires: two F-rated, and one E-rated which hasn't blown out (yet).

crewstx wrote:I have a 2010 Montana 3400RL with a total (ship+max carrying-tongue)weight of 13540 pounds and have been using GY Marathons 235/80R16 and blowing out tires and damaging sides of RV. I would like to upgrade to a better tire ( maybe a G rated tire or an LT tire but do not know which. Also how can I find out what pressure my rims will take in the tires. Montana will not tell me the pressure rating of my RIMS.I "think" you're saying the GVW of your 5er is 13,540? If so, you probably have 6,000# rated axles....Believe a G rated tire might be over kill, but your call...I had a Coachmen with 6,000# rated axles and went with Michelin XPS RIBS, they are very expensive, but well worth the money/peace of mind...Also highly recommended is the Bridgestone Duravis...just had a brain toot and can't remember the model number, but "think" it's the R500...seem to be as good as the RIBS, but cost less....I'd go with an "E" weight tire if the GVW of your 5er is only 13,540#. Odds are very good, at the very least, your rims will take 80 psi.....

The GVWR of the 2010 Montana 3400RL is VERY close to 16,000#, I have one. You do not deduct the pin weight when looking at these numbers. Specs are on the Montana web site. If you are looking to upgrade the tires you could go with the Goodyear G614 like many other Montana owners have done, you could also look at the Sailun S637 which is also a G rated tire and quite a bit cheaper. The rims should be rated for the 120#psi as mine are but you can check by looking on the back side of any of the rims. There will be a casting mark on one of the spokes listing the max psi for that rim. Your camper is equipped with the 7000# axels also. Tim

2-MTnesters wrote:The GVWR of the 2010 Montana 3400RL is VERY close to 16,000#, I have one. You do not deduct the pin weight when looking at these numbers. Specs are on the Montana web site. If you are looking to upgrade the tires you could go with the Goodyear G614 like many other Montana owners have done, you could also look at the Sailun S637 which is also a G rated tire and quite a bit cheaper. The rims should be rated for the 120#psi as mine are but you can check by looking on the back side of any of the rims. There will be a casting mark on one of the spokes listing the max psi for that rim. Your camper is equipped with the 7000# axels also. TimWow, one would think one would know what the GVW of their 5er is...Glad you gave us the correct information...In that case, "E" rated tires are out....7,000# axle ratings....As you've stated, go with GY G614's, (which is what I have on my 5er with a GVW of 16,950# and 7,000# rated axles. or the less pricy G rated Sailun S637 ties. Both very good tires, just depends on how much money the OP has to pay for tires.:)

Want to upgrade tires | Good Sam Community

NC_Hauler
Explorer
Aug 07, 2014
RockyMt wrote:
Trailer weight is around 15,000lbs.Tires are 235/85r/16.I run Michelin traction XPS on my TV,third set.Swear by them.Trailer axles are 7000lb and XPS would run to close to max weight-3000lb +/- compared to almost 4000lb on the Carlisle.

One needs to know their weights...My 5er has a GVW of 16,950#....loaded to 16,200#...7,000# weight rated axles....My tire is a GY G614, for 7,000# rated axles...as you stated, an "E" rated Michelin RIB would be too close to match that weight...I wouldn't use a RIB on a 7,000# weight rated axle...but I wouldn't use a Carlisle either, even rated to 4,000#, that doesn't particularly mean it's a "better" tire...The G614's are rated at 3750# per tire at 110 psi...now I've had those on my 5er since 07' and no real issue (one tread lost on a tire, but found I had to replace a weak spring pack that only allowed 1" of clearance between the tire tread and the wheel well.

I would have also recommended the Sailun S637 G rated tire....

Carlisle doesn't have a very good reputation, but hopefully you'll be fine.
RockyMt
Explorer II
Aug 07, 2014
Trailer weight is around 15,000lbs.Tires are 235/85r/16.I run Michelin traction XPS on my TV,third set.Swear by them.Trailer axles are 7000lb and XPS would run to close to max weight-3000lb +/- compared to almost 4000lb on the Carlisle.
NC_Hauler
Explorer
Aug 07, 2014
RockyMt wrote:
Carlisle tires are ST tires speed rated at 65 mph.Heavy tire,have 1500 miles on them and are wearing much better than the Marathons.I could not quit worrying about the Goodyear tires with all the bad talk.Carlisle's recommended to me by a reliable source,proven track record.I do not drive over 65mph so works for me.

Heavy tire compared to what? Proven track record?? Have you ever picked up a Michelin XPS RIB tire? Will admit that the Marathons do have a bad reputation, but anyone who has been around these forums or done the research also know that Carlisle too has a bad reputation for ST tires. Chris, (me again), knows what he's talking about when it comes to Carlisle and their speed ratings,, they're all over the place with them. BUT, your 5er, I assume, isn't very heavy, so that's a plus in your favor...Carlisle tires seem to work on lighter TT's and 5er's where they're not pressed to handle much heavier loads and stress when being used on heavier 5er's.
Me_Again
Explorer III
Aug 07, 2014
laknox wrote:
RockyMt wrote:
My son-AVP for Discount Tire Corp.

FWIW, DT lists the 15" E Carlisles as an N speed rating, or 87 mph. I don't think I could do that on the flat, while towing, even if I wanted to. I checked Carlisle's site and could find no info there. My Carlisles have nothing on the sidewall about a 65 mph speed rating.

Lyle

Carlisle is playing games with speed ratings to attract the bass boat dudes. Their online catalog states most ST carry 65 MPH speed restriction. Above that a couple bullets it recommends not towing over 60 MPH. Then they tell people on the phone to tow up to the speed limit on the highway they are traveling on. Real shell game!

Hard to respect a company that plays games like that. Chris
laknox
Nomad
Aug 07, 2014
RockyMt wrote:
My son-AVP for Discount Tire Corp.

FWIW, DT lists the 15" E Carlisles as an N speed rating, or 87 mph. I don't think I could do that on the flat, while towing, even if I wanted to. I checked Carlisle's site and could find no info there. My Carlisles have nothing on the sidewall about a 65 mph speed rating.

Lyle
Cummins12V98
Explorer III
Aug 07, 2014
RockyMt wrote:
My son-AVP for Discount Tire Corp.

Let's hope they are the "Miracle" ST tire!
RockyMt
Explorer II
Aug 07, 2014
My son-AVP for Discount Tire Corp.
Cummins12V98
Explorer III
Aug 06, 2014
RockyMt wrote:
Carlisle tires are ST tires speed rated at 65 mph.Heavy tire,have 1500 miles on them and are wearing much better than the Marathons.I could not quit worrying about the Goodyear tires with all the bad talk.Carlisle's recommended to me by a reliable source,proven track record.I do not drive over 65mph so works for me.

What was the reliable source?
RockyMt
Explorer II
Aug 06, 2014
Carlisle tires are ST tires speed rated at 65 mph.Heavy tire,have 1500 miles on them and are wearing much better than the Marathons.I could not quit worrying about the Goodyear tires with all the bad talk.Carlisle's recommended to me by a reliable source,proven track record.I do not drive over 65mph so works for me.
taken
Explorer II
Aug 06, 2014
Me Again wrote:
NC Hauler wrote:
RockyMt wrote:
I just upgraded my tires on my monty-went with Carlisle 236/85r/16 "F"
@ 95lbs.Rated 3900 lbs.Work well!My rims are rated at 110 psi.

I'd keep an eye on the Carlisle's....don't know if I'd call that an upgrade or not...

Not to worry, the Carlisle Radial Trail RH got the Nylon cap like the Marathon did years ago, so they should be good now just like the Marathons!

Chris

You are joking right?

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