โMay-01-2014 07:31 PM
โMay-02-2014 01:59 PM
fla-gypsy wrote:PartyMarty wrote:
regarding weight reduction with LT tires ?
That is the misunderstanding .
The ST scale is so weak that the placard on the side of equivalent size tires shows the ST tire at a higher weight rating than the similar sized LT tire .
even though the LT tire is more tire from the same manufacuter.
The LT Tire definitely is more tire than than the same size ST tire .
from the tire rack website here is a comparison between ( nearly ) identical 235/80R16E tires :
From the tirerack website .
Goodyear ST 235/80 R 16 E
price = $ 135 each
weight = 34 # each
section width is 9.2 "
tread width= 6.8 "
diameter is 30.7 "
rated 3420 # at 80 psi on ST scale
Goodyear LT 235/85 R 16 E
price = $ 157 each
weight = 50 # each
section width is 9.3 "
tread width= 7.0 "
diameter is 31.7 "
rated 3042 # at 80 psi on LT scale
So the Goodyear ST tire is rated for 112.4 % higher load rating than the equivalent Goodyear LT tire .
And they will sell this ST tire for only 86 % of the LT tire .
And the ST tire has less mass for cordage , plys , caps and so forth because it weighs 76 % of the Goodyear LT tire .
This is very telling as to how much lower the ST standards are in relation to the LT standards .
Further the ST tire has plainly stamped on the sidewall " for trailer use only " .
The LT tire has no disclaimer .
to recap :
the manufacturer is the same.
both tires are 235 ( one is 80 = 80% and the other is 85 = 85% )
both tires are load range E or 80 PSI .
The ST tire is cheaper ( 86% cost ) .
The ST tire has less rubber and cords .
The ST tire weighs 76 % of the LT Tire .
The LT tire only gets a 3042# rating on the LT scale .
The cheaper / lighter ST tire gets a 3402 # rating on the less demanding ST scale .
This is very clear .
Goodyear , the manufacturer , has to build a much tougher tire for LT use such as on our heavy duty pickups .
If what you say is true then why do they derate the tire? Couldn't there be specific design differences that account for a higher weight rating? Why would they derate a tire that is capable of more weight? I have heard this argument before but other than a weight difference in the two tires I see no reason to believe it can carry more then the maker says it can.
โMay-02-2014 01:46 PM
PartyMarty wrote:
regarding weight reduction with LT tires ?
That is the misunderstanding .
The ST scale is so weak that the placard on the side of equivalent size tires shows the ST tire at a higher weight rating than the similar sized LT tire .
even though the LT tire is more tire from the same manufacuter.
The LT Tire definitely is more tire than than the same size ST tire .
from the tire rack website here is a comparison between ( nearly ) identical 235/80R16E tires :
From the tirerack website .
Goodyear ST 235/80 R 16 E
price = $ 135 each
weight = 34 # each
section width is 9.2 "
tread width= 6.8 "
diameter is 30.7 "
rated 3420 # at 80 psi on ST scale
Goodyear LT 235/85 R 16 E
price = $ 157 each
weight = 50 # each
section width is 9.3 "
tread width= 7.0 "
diameter is 31.7 "
rated 3042 # at 80 psi on LT scale
So the Goodyear ST tire is rated for 112.4 % higher load rating than the equivalent Goodyear LT tire .
And they will sell this ST tire for only 86 % of the LT tire .
And the ST tire has less mass for cordage , plys , caps and so forth because it weighs 76 % of the Goodyear LT tire .
This is very telling as to how much lower the ST standards are in relation to the LT standards .
Further the ST tire has plainly stamped on the sidewall " for trailer use only " .
The LT tire has no disclaimer .
to recap :
the manufacturer is the same.
both tires are 235 ( one is 80 = 80% and the other is 85 = 85% )
both tires are load range E or 80 PSI .
The ST tire is cheaper ( 86% cost ) .
The ST tire has less rubber and cords .
The ST tire weighs 76 % of the LT Tire .
The LT tire only gets a 3042# rating on the LT scale .
The cheaper / lighter ST tire gets a 3402 # rating on the less demanding ST scale .
This is very clear .
Goodyear , the manufacturer , has to build a much tougher tire for LT use such as on our heavy duty pickups .
โMay-02-2014 11:58 AM
โMay-02-2014 11:15 AM
love4god wrote:
Yeah, I've pretty much had a moron moment.
I realize I was mistaken, in the last year I had my truck tires replaced and my RV rims (1 of the factory steel rims rusted through). My tires are actually about 3 years old. We've been travelling around the U.S. those three years and they're just worn down too much. It's odd they blew on the same day, but if the tire was old and was taking extra pressure from the spare being Load D or just the stress of driving 2 slow miles on 3 tires to get off the 95, it seems plausible. Bad road, under inflated, extra load, older tire... it all adds up.
The only problem is that I'm stuck in the middle of nowhere and the guy only has Hi Runs. Nothing much I can do about it. Putting on 4 new Hi Runs, 10 ply. They're new and price isn't terrible. So we'll see how it goes.
I had a real mental lapse with these tires. When I got the rims last year I was thinking I got rims and tires but my wife corrected me and I checked the receipt. I didn't get tires because my Maxxus tires still looked good and I never had any problems with them. They just reached the end of their life I suppose. It's actually amazing how good the tread looks considering we've been driving them around the country for 3 years. Must easily be 50k miles on them and they still have some decent tread (the 2 that didn't blow on me).
When I said driving at 70 I mean psi, not mph. I usually run around 65mph on interstate although I do get up to 70 sometimes.
Also, I can't afford the weight reduction for LT's. I thought about it last time but we have been living/travelling and we just can't afford that much weight reduction. We're just below max and there isn't much we can get rid of.
I guess when I got new rims I should have gotten 16's. I didn't want to do tires at the time and do jump to 16's you have to do it all at once. It was, and still is, a financial decision. Can't buy new rims again so I'm stuck at 15, but I am also sticking with the 10 ply (E's).
So lessons learned today:
1. Keep tires inflated to max
2. Keep better track of when you need new tires
3. Keep the speed down to 65 when towing
Tires are getting mounted now, at the local library while the kids do school and I check in on some work. Should be back on the road in a little bit.
โMay-02-2014 10:54 AM
fla-gypsy wrote:Lowsuv wrote:
maxxis failure # 22 on this forum.
= non value added post
โMay-02-2014 10:15 AM
โMay-02-2014 09:44 AM
โMay-02-2014 09:43 AM
โMay-02-2014 09:41 AM
โMay-02-2014 08:10 AM
op says wrote:
It's possible that when the one tire went and I put on the spare that we overloaded the other side. That tire blew out, I heard it go. My tires are E rated buy my spare was D rated. When I bought new tires I had them use the best of my old ones (an older D rated Towmax) as my spare. I guess that could have shifted weight over to the other side
I thought I should be at 70psi, but I looked and it seems they should be around 85 (although I've been driving at 70 for a long time).
โMay-02-2014 07:43 AM
Lowsuv wrote:fla-gypsy wrote:Lowsuv wrote:
maxxis failure # 22 on this forum.
= non value added post
Okay.
Value added post .
In a 15 inch tire there is a better alternative .
LT rated Goodyear 225/70R15 c ( commercial ) load range D .
Gargo G26 .
sidewall rating 2470 # on an LT scale .
This is a European van tire such as the Mercedes sprinter .
Made in France or Germany , not Asian like the maxxis .
Speed rated for 106 mph , unlike the maxxis at 65 mph .
If the OP has 6 bolt axles he can make the switch to 16 inch wheels .
There are many choices of LT rating scale 16 inch tires that are rated 3042 # and more .
If the OP visits the tire rack website and plugs in size 225/70R15 and compares that with the standard ST 225 /75R15 he can do his own comparison in depth .
Simply put , the Goodyear Cargo G26 225 /70R15 load range D is the most tire currently available in a 15 inch diameter wheel .
โMay-02-2014 07:31 AM
โMay-02-2014 07:20 AM
fla-gypsy wrote:
Two tires failing that close together is indicative of external forces at work such as road hazards, excessive heat, or over loaded. Having drove that stretch my guess would be road hazards.
โMay-02-2014 07:10 AM
โMay-02-2014 06:52 AM