Different Tire Width on Escape 21 - Page 5 - Escape Trailer Owners Community

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Old 06-06-2016, 04:07 PM   #41
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?? Placque is not that specific. Here's what I got, Jim.
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Old 06-06-2016, 04:11 PM   #42
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Got it, so you have about 500# accessories to get from 2610 dry to 3010 leaving 980 as the remainder for cargo.
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Old 06-06-2016, 04:16 PM   #43
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And I have since added an air conditioner and a tongue box.
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Old 06-06-2016, 04:17 PM   #44
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So my question is, since both 21 and 19 have the same frame and same wheels (axles not sure)
why would not the capacity be the same for both?
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Old 06-06-2016, 04:37 PM   #45
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Originally Posted by MyronL View Post
My tire guy gave me the choice of 8-ply or 4-ply tires. The replaced factory tires were 4-ply (after 22,000 miles). He said the trailer makers were switching to the 8-ply tire. Wondering now if Escape is making that switch.
It's too bad so many people still use those "ply" numbers. There really are layers of reinforcing cord in tires, which is what the plies are supposed to be, but there are not four or eight of them in these tires. Those numbers are "ply ratings", referring to the number of plies your great-grandfather's tires might have had to reach the same load capacity. Your actual tires might have two sidewall plies, plus a couple more under the tread. The original "4-ply" (actually Load Range C) and new "8-ply" (actually Load Range D) tires may have the same number of plies; the higher-rated ones might have one more sidewall ply at the most.

Proper terminology is the Load Range...
  • Load Range A
    2-ply rating
    (typical max inflation pressure 24 psi)
    about 1170 lb capacity for ST205/75R15
    long obsolete
  • Load Range B
    4-ply rating
    (typical max inflation pressure 35 psi)
    1480 lb capacity for ST205/75R15
    typical car tires
    equivalent to SL (Standard Load) in passenger and euro-metric types
  • Load Range C
    6-ply rating
    (typical max inflation pressure 50 psi)
    1820 lb capacity for ST205/75R15
    lowest commonly used on trailers
    equivalent to XL (Extra Load) in passenger and euro-metric types
  • Load Range D
    8-ply rating
    (typical max inflation pressure 65 psi)
    2150 lb capacity for ST205/75R15
  • Load Range E
    10-ply rating
    (typical max inflation pressure 80 psi)
    probably 2400 to 2500 lb capacity for ST205/75R15 if you could find one
Escape uses (last I saw) Load Range C. In the size they're using, this range of tires has 3640 pounds of capacity per axle, and the highest-rated axles used in any Escape model (the 17' and 5.0TA) are rated for 3500 pounds... and you can't put that much load on the axle anyway without exceeding the trailer's GVWR (massively in the case of the 5.0TA). Other models have lower axle ratings, so their tires have even more excess capacity. Load Range C is correct for any Escape.

Load Range D tires will be heavier, and more expensive, and will cause more drag and heat buildup due to the excessive sidewall reinforcement. You can use them, but anyone talks you into them they either don't understand what they're talking about, or they're just trying to upsell you to a more expensive product.

I hope Escape is not planning to switch to a higher than appropriate load range of tire.
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Old 06-06-2016, 04:39 PM   #46
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Originally Posted by cpaharley2008 View Post
So my question is, since both 21 and 19 have the same frame and same wheels (axles not sure) why would not the capacity be the same for both?
They have the same series of axle (Dexter Torflex #10), but with different amounts of rubber to set the springing to an appropriate level for each trailer, resulting in different axle capacities. The GVWR is related to the total axle capacity. The tires are not the limiting factor in load capacity for any model of Escape.
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Old 06-06-2016, 04:43 PM   #47
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Originally Posted by MyronL View Post
Just checked my trailer specs nameplate. It's a 19 all right. Tongue weight, 396 pounds, GVW 4,008 pounds, cargo capacity 981 pounds. Interesting thing is the plaque claims it requires a Class 3 hitch.
The hitch notation is correct. The limit for Class 2 is 3500 pounds of total trailer weight, but the Escape 19' can be loaded up to 4008 pounds (GVWR), so if you are to be able to use the full trailer capacity you need a hitch rated for at least 4008 pounds... which is Class 3 because it is more than 3500 pounds (and not more than 5000 pounds).
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Old 06-06-2016, 04:51 PM   #48
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Quote:
Originally Posted by MyronL View Post
Just checked my trailer specs nameplate. It's a 19 all right. Tongue weight, 396 pounds, GVW 4,008 pounds, cargo capacity 981 pounds. Interesting thing is the plaque claims it requires a Class 3 hitch.
Myron , 396.83 tongue weight , 4008 gross weight , 740.75 carrying capacity . We got the ac from the beginning . Pat and front box
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Old 06-06-2016, 05:00 PM   #49
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Tire trivia:
If one chose to use the larger ST225/75R15 tire size (which fits, as we have accidentally seen), then they would only need to be Load Range B (capacity at 35 psi = 1760 pounds) to have excess capacity for any of the tandem axle Escapes. I'm not suggesting anyone actually do that...
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Old 06-06-2016, 05:14 PM   #50
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Originally Posted by cpaharley2008 View Post
Got it, so you have about 500# accessories to get from 2610 dry to 3010 leaving 980 as the remainder for cargo.
Yes (except that would be 400 pounds of options)... but that's for cargo and fluids. RVs made under RVIA rules in the U.S. (as most are) had a sticker which shows how much actual cargo capacity is left after allowing for full fresh water tank and water heater; apparently this might have ended a few years ago, leaving only the calculation Escape is showing in this example.

For instance, with the listed 28 US gallon fresh water tank and 6 US gallon water heater of a pre-2017 19' or 21', that's 272 pounds of water. Then there's 40 pounds of propane, so the real Cargo Carrying Capacity is
980 - 272 -40
=668 pounds
(unless Escape already included the propane in their calculation)

Not everyone travels with a full tank (or equivalent distributed between fresh and waste tanks), but the typical practice was (but may be no longer) to calculate allowing for this. Regardless of the rules for labels, it's good to remember you don't really have enough capacity for a full water tank plus a half-ton of "essentials".
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