replacing 15" tires

I would go with MAXXIS or Marathon 225/15/E for now and start setting your eyes on that new RV.

I am not so sure that is a "safety margin" as much as it is a margin for loading weight in the trailer.

Would not Es at full PSI (as recommended for a trailer tire to help against tread shear) have less rubber on the road for braking?

Safety margin on tires isn't a bad thing is it?

Remember all it takes is one bad day to wipe out the cost of the tires fixing your rig.

I have a good home for my 2 year old 15" Goodyear Tires and wheels on another lighter trailer that stays closer to home. I plan to upgrade wheels and tires to 16" LT's this year on our 30' Arctic Fox with 5200# axles. I know it might be overkill but I look at it as additional insurance.

It sounds like 15" Maxxis or the new Carlisle's would be a good alternative if you don't plan to keep your rig long-term.

robrose1 wrote:
Bought the Carlisle radial trail RH last year in e rating . So far I am very happy with them. Rig has been in storage since sept., last week I bought it home to clean and the tires still had 80 psi in them.

Sounds good so far. I am a believer in E rated trailer tires, whatever the size.

laknox wrote:

sarhvac1 wrote:
I know this is beat to death however I have 225/75r15 tires with a d rating @65psi looking to replace I know every one on here is LT positive however everything I look at in LT doesn't really have a 15" I should say all the ones recommended on here and the ones that do have a higher pressure rating// question is will rim design be able to handle this? also talked to rv dealer where we bought unit and a tire guy both think the new Carlisle USA trail are the way to go?? NEW is what I'm wondering about

I upgraded from the placarded D tires to E tires on my 11,300 GVW FW. I had to make sure that my Al rims were rated to 80 psi, which they are, and are stamped on the back side. That's your first step; check the rating on your rims. You might have to dismount a tire, though, as some are stamped in the valley =inside= the tire. I suspect that Komfort simply used the same Al rims on all their 10k+ trailers. If your rims are steel, I'd bet that they are only 65 psi and you'll have to change to heavier rims to handle E tires. If they're Al, you may be in the same boat as I am. I am going into the 3rd year with my Carlisle RHs and, so far, they're working well. I don't put a lot of miles on them, store the FW on boards and keep the tires covered. They're just starting to show some weather checking.

Lyle

Interesting that you put Es on your trailer! Overkill? This set of numbers reveals what was really going on there and why Ds were already plenty.
(Reading- Trailblazer by Komfort 25FSG)/Komfort 26FS (wts in lbs.)

Unloaded vehicle wt- 7,706/7,706
Tires- Ds/Cs
GAWR- 10,160 (four Ds)/8,600(four Cs)
Dexter 5200s on both for 10,400
GVWR- 11,273/10,015
Pin (unloaded)- 1,113/1,415
Cargo not including water-4,033/1,748
Length-28' 11"/ 28' 6"

Note that the GAWR is four tires worth and the GVWR is GAWR plus pin.

Note the Ds GAWR is close to the 10,400 of the two Dexters so with Es, now the axle is the weak link instead of the tires as fitted, so you can't go to full tire loading anyway with Es. The official GAWR is still the four Ds worth.

So they both weigh the same unloaded but one has Ds and the other has Cs. The pin wts given are apparently when the trailer is unloaded, so they mixed unloaded pin and loaded tire GAWR to get the GVWR which is weird. The 26FS loaded to 9,800 has 1,900 pin (scaled)so the 25FSG would be similar.

In later model years Komfort changed the 26 to Ds and all of a sudden the same trailer had GAWR of 10,160, etc similar to the 25FSG numbers above. Same trailer. So it was ok with Cs but now has Ds.

The Ds gave it more cargo wt and more margin on the tires generally. Lots of margin.

sarhvac1 wrote:
I know this is beat to death however I have 225/75r15 tires with a d rating @65psi looking to replace I know every one on here is LT positive however everything I look at in LT doesn't really have a 15" I should say all the ones recommended on here and the ones that do have a higher pressure rating// question is will rim design be able to handle this? also talked to rv dealer where we bought unit and a tire guy both think the new Carlisle USA trail are the way to go?? NEW is what I'm wondering about

I upgraded from the placarded D tires to E tires on my 11,300 GVW FW. I had to make sure that my Al rims were rated to 80 psi, which they are, and are stamped on the back side. That's your first step; check the rating on your rims. You might have to dismount a tire, though, as some are stamped in the valley =inside= the tire. I suspect that Komfort simply used the same Al rims on all their 10k+ trailers. If your rims are steel, I'd bet that they are only 65 psi and you'll have to change to heavier rims to handle E tires. If they're Al, you may be in the same boat as I am. I am going into the 3rd year with my Carlisle RHs and, so far, they're working well. I don't put a lot of miles on them, store the FW on boards and keep the tires covered. They're just starting to show some weather checking.

Lyle

I have had nothing but good success with 15" Maxxis ST tires. I have went to the load range "E" for more reserve capacity.

Keystone gave me good info and the rim manufacturer phone number rims can take 80psi so were good to go with a e rated tire going to try the new Carlisle radial trail RH LR E like I said never had a issue with towmax hope these do just as well

Goodyear Cargo G26 commercial tire perhaps ?

http://www.tirerack.com/tires/tires.jsp?tireMake=Goodyear&tireModel=Cargo+G26&sidewall=Blackwall&partnum=27R5G26&tab=Specs

sarhvac1 wrote:
i have the towmax on the trailer since new probably close to 20k miles on them they are just starting to show signs of wear center rib on 1 looks like getting bald never had a problem or any issues with the towmax but again my rims have 65 psi tires on them will they hold 80psi?? i will call keystone today see if they actually answer the question.

Center rib wear can indicate tread separation. You need new tires.

Logic says rims rated at 65 psi have a maximum inflation pressure of 65 psi cold.

FastEagle