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  1. #1
    Seasoned Camper
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    How much excess capacity are your trailer tires rated for?

    My trailer is a 2020 Transcend Xplor 221RB

    Tires are 205/75R15 D with each tire rated at 2150 lb.

    Trailer GVWR = 6995

    2150x4 = 8600

    8600/6995 = 1.229, which puts me at about 23% excess capacity

    I'm hoping with the excess capacity I can count on the tires lasting 4 troublefree years.

  2. #2
    Long Hauler
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    Be nice to think it worked that way, but it doesn't.
    Howard and Peggy
    2019 Momentum 351M, and 2018 RAM Cummins dually 6-speed.
    His: 1999 Honda Interceptor
    Hers: 2013 Spyder ST-S

  3. #3
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    Quote Originally Posted by TXkmpr View Post
    My trailer is a 2020 Transcend Xplor 221RB

    Tires are 205/75R15 D with each tire rated at 2150 lb.

    Trailer GVWR = 6995

    2150x4 = 8600

    8600/6995 = 1.229, which puts me at about 23% excess capacity

    I'm hoping with the excess capacity I can count on the tires lasting 4 troublefree years.
    Hopefully, you're also keeping your weight to at least 80% of GVWR. That gives you a bit more buffer.
    Chad
    2023 23LDE 965W Solar, Victron Multiplus, Solar Controllers, Cerbo GX, 4x280AH DIY Lithium Batteries, SeeLevel Tank Monitoring, Shock Absorbers (Replaced 2022 22MLE)
    2022 F350 6.7L Superduty, Carbonized Gray, Ultimate Lariat Pkg, 4WD, Crew Cab, 160" Wheelbase, 3.55EL Rear End, 3566# Payload
    Adaptive Steering, Ultimate Camera Pkg, 20" Wheels, 397 Amp Dual Alternator, ARE Topper (Replaced 2004 F150)

  4. #4
    Site Team xrated's Avatar
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    I have a 20,000 lb GVWR Momentum triple axle....so six tires. Each tire is rated at 4080 lbs when inflated to the 110 psi. and new. That give a total tire load capacity of 24,480 lbs. So if the trailer was loaded all the way to 20K lbs and roughly 4000 lbs of that is on the pin of the truck, that brings the total weight on the tires down to 16,000 lbs. Using that number and the tire load capacity rating at 110 psi, that would be 24,480 minus 16,000 lbs for a total of 8480 lbs. Divided between 6 tires that is 1413 lbs "extra" capacity for each tire. So each tire's load capacity vs. excess capacity would be approx. 34 to 35%. But as we all know, those numbers reflect a brand new tire, running 110 psi, no age depreciation factored in....plus....you will rarely ever find the exact amount of weight being put on every tire. Streetside vs. Curbside.....front axle vs. rear axle and middle axle if you have a triple like I do.
    2016 F350 CrewCab Dually
    2018 Momentum 394M...Heavily Modded!
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    Excessive Payload is a Wonderful Thing

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  5. #5
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    Quote Originally Posted by Riverbug View Post
    Hopefully, you're also keeping your weight to at least 80% of GVWR. That gives you a bit more buffer.
    Are you saying he should limit his total weight to no more than 80% of his rated GVWR??
    2021 Solitude 375 RES-R
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  6. #6
    Long Hauler
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    Quote Originally Posted by xrated View Post
    I have a 20,000 lb GVWR Momentum triple axle....so six tires. Each tire is rated at 4080 lbs when inflated to the 110 psi. and new. That give a total tire load capacity of 24,480 lbs. So if the trailer was loaded all the way to 20K lbs and roughly 4000 lbs of that is on the pin of the truck, that brings the total weight on the tires down to 16,000 lbs. Using that number and the tire load capacity rating at 110 psi, that would be 24,480 minus 16,000 lbs for a total of 8480 lbs. Divided between 6 tires that is 1413 lbs "extra" capacity for each tire. So each tire's load capacity vs. excess capacity would be approx. 34 to 35%. But as we all know, those numbers reflect a brand new tire, running 110 psi, no age depreciation factored in....plus....you will rarely ever find the exact amount of weight being put on every tire. Streetside vs. Curbside.....front axle vs. rear axle and middle axle if you have a triple like I do.
    I read the post several times, but I'm still not sure whether there was a point to be made. You can do things perfectly, underload your tires and still have blowouts, tread separation, bulges, etc. You do the best you can, but it's all a crapshoot at times. Do what you can, and hope Murphy isn't along for the ride.
    Howard and Peggy
    2019 Momentum 351M, and 2018 RAM Cummins dually 6-speed.
    His: 1999 Honda Interceptor
    Hers: 2013 Spyder ST-S

  7. #7
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    Quote Originally Posted by JKellerJr View Post
    Are you saying he should limit his total weight to no more than 80% of his rated GVWR??
    I'm not saying he should do anything.
    Chad
    2023 23LDE 965W Solar, Victron Multiplus, Solar Controllers, Cerbo GX, 4x280AH DIY Lithium Batteries, SeeLevel Tank Monitoring, Shock Absorbers (Replaced 2022 22MLE)
    2022 F350 6.7L Superduty, Carbonized Gray, Ultimate Lariat Pkg, 4WD, Crew Cab, 160" Wheelbase, 3.55EL Rear End, 3566# Payload
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  8. #8
    Long Hauler huntindog's Avatar
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    Quote Originally Posted by Riverbug View Post
    I'm not saying he should do anything.
    The LRH coopers on my 398M are rated for 4,805# each.
    Six of them will carry 28,830#
    Probably about 16K on the axles for about 44% reserve.

    Do I win?
    2021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
    Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
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  9. #9
    Seasoned Camper Cannon07's Avatar
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    My 351MR with 1400 lbs. in garage, 1/2 loaded fridge and clothes for a week is already at 16,800 which is the GVWR for that trailer. That leaves 600 lbs. per tire or about 15% capacity left. But that does not tell the true story. The 351 is heavier on the kitchen slide side. Mine leaned 1/2 lower since new. At 3000 miles I notice one flat spring and one almost flat on that side. Other side still had good arch. I replaced the flat one and when I lowered jack it was flat just like the one I removed. I now run 4000lb springs on the kitchen slide side and left the 3500lb on the other side. I can put it on the scaled but can't weight ea. tire. If I could I would probably find the tires over capacity on that side. Guess that's why they went to H rated on the new ones.
    2021 351MR
    2017 Jayco 377rlbh (sold)

  10. #10
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    Quote Originally Posted by huntindog View Post
    The LRH coopers on my 398M are rated for 4,805# each.
    Six of them will carry 28,830#
    Probably about 16K on the axles for about 44% reserve.

    Do I win?
    We're all winners!
    Last edited by Riverbug; 11-14-2021 at 06:19 PM.
    Chad
    2023 23LDE 965W Solar, Victron Multiplus, Solar Controllers, Cerbo GX, 4x280AH DIY Lithium Batteries, SeeLevel Tank Monitoring, Shock Absorbers (Replaced 2022 22MLE)
    2022 F350 6.7L Superduty, Carbonized Gray, Ultimate Lariat Pkg, 4WD, Crew Cab, 160" Wheelbase, 3.55EL Rear End, 3566# Payload
    Adaptive Steering, Ultimate Camera Pkg, 20" Wheels, 397 Amp Dual Alternator, ARE Topper (Replaced 2004 F150)

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