User Tag List

Page 1 of 2 12 LastLast
Results 1 to 10 of 13
  1. #1
    Site Team traveldawg's Avatar
    Join Date
    Aug 2017
    Location
    Florida Space Coast
    Posts
    3,853
    Blog Entries
    1
    Mentioned
    94 Post(s)
    Tagged
    0 Thread(s)

    Upsizing Tire Size.

    Anyone go from a ST235-80R16G to a ST235-8516G??

    I have Sailuns now and am considering replacing with the next size up. It gets me a shade higher which I can use. They can carry a heavier weight to so maybe I get a bit more safety margin.
    Larry KE4DMG
    2022 F-350 KRU SRW LB - Airlift 5000+, ForScan, 37 RDS Aux Tank,
    2019 310GK-R - Sailuns; MorRyde IS; Disc Brakes; 20K Reese Goosebox
    Search kalakamods for my mods


  2. #2
    Site Team xrated's Avatar
    Join Date
    Feb 2019
    Location
    "Murvul", TN
    Posts
    3,357
    Mentioned
    135 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by traveldawg View Post
    Anyone go from a ST235-80R16G to a ST235-8516G??

    I have Sailuns now and am considering replacing with the next size up. It gets me a shade higher which I can use. They can carry a heavier weight to so maybe I get a bit more safety margin.
    If you still have the trailer listed in your signature, the 310GK, it looks like the GVWR of that trailer is 15,000 lbs.....correct? So if you have the trailer loaded to it's GVWR of 15K, there should be approx at least 3000 lbs of that weight on the pin and that leaves approx. 12,000 lbs on the 4 trailer tires. The "G" rated tires, if I'm not mistaken are 4080 lbs when inflated to the max. sidewall pressure, so you have a total of 16,320 lbs of load capacity available for what is probably only ~12,000 lbs on the tires themselves. That leaves you with a reserve total of 4320 lbs.....or approx. 1080 lbs per tire.

    Are you looking to replace them just to gain more load capacity reserve.....or do you actually need to replace the tires because of age and/or wear. I'm just curious here.
    2016 F350 CrewCab Dually
    2018 Momentum 394M...Heavily Modded!
    2023 Suzuki GSX-S1000 GT+
    Excessive Payload is a Wonderful Thing

    "If it ain't fast....It ain't Fun"

  3. #3
    Big Traveler Txfivver's Avatar
    Join Date
    Jun 2018
    Location
    San Antonio Tx
    Posts
    1,648
    Mentioned
    19 Post(s)
    Tagged
    0 Thread(s)
    Larry I was going to go to 85's on mine as well and decided it was overkill and just tightens up already tight clearances in the wheel well. As xrated stated the 235-80's have more than enough weight reserve for my trailer and didn't want to make it ride any harder than necessary. I'm at ~ 12700 pounds on the axles now so I have over 3000 pounds reserve capacity with the smaller size. Your 310 should be considerably lighter than mine so it might be overkill.
    2019 Solitude 375RES Onan 5500 Splendide W/D Samsung res. fridge
    2020 Ford F450 Platinum dually 6.7L 4:30 gears
    B&W Companion for Ford puck system 20K lbs
    Jeff

  4. #4
    Rolling Along
    Join Date
    Mar 2021
    Posts
    585
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    I went up to a 16" rim and Cooper LT tires. Tired of the ST tire hassle and worrying about tire failures.
    2010 Jayco 26(SOLD)
    2011 Keystone Outback 277RL(SOLD)
    2021 Grand Design 268BH
    2013 Ford F250 XLT, 6.2L Gas

  5. #5
    Site Team xrated's Avatar
    Join Date
    Feb 2019
    Location
    "Murvul", TN
    Posts
    3,357
    Mentioned
    135 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by BobLandry View Post
    I went up to a 16" rim and Cooper LT tires. Tired of the ST tire hassle and worrying about tire failures.
    Personally, I would never use an LT tire for trailer service. There is a reason that ST tires have stiffer sidewalls and are more durable for trailer service. To each their own.
    2016 F350 CrewCab Dually
    2018 Momentum 394M...Heavily Modded!
    2023 Suzuki GSX-S1000 GT+
    Excessive Payload is a Wonderful Thing

    "If it ain't fast....It ain't Fun"

  6. #6
    Seasoned Camper Just Krusen's Avatar
    Join Date
    Jul 2016
    Posts
    315
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by traveldawg View Post
    Anyone go from a ST235-80R16G to a ST235-8516G??

    I have Sailuns now and am considering replacing with the next size up. It gets me a shade higher which I can use. They can carry a heavier weight to so maybe I get a bit more safety margin.
    I went to the 85 series a couple of years ago. Great tires and no problems with the extra1/2".
    Pam & Ed
    "Just Kruse'n"

    Momentum 376TH (New 11/04/2016)
    Full Timing since 11/04/2016
    2017 Ram 3500 DRW Aisin 3.73

  7. #7
    Site Team traveldawg's Avatar
    Join Date
    Aug 2017
    Location
    Florida Space Coast
    Posts
    3,853
    Blog Entries
    1
    Mentioned
    94 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Just Krusen View Post
    I went to the 85 series a couple of years ago. Great tires and no problems with the extra1/2".
    Thanks, Just Krusey. I was pretty sure they would fit. There seems to be plenty of room in the wheel well area. I appreciate the feedback.

    rxated: mostly I want the extra hight - I can use a bit more clearance between the truck bed and RV. And since the carry a bit more weight then it doesn't hurt anything.

    I have about 12,800 lbs on the axels. I knew the 80's were ample, again, just looking for some height.

    Some 17.5" Goodyear KMAX J rated tires would be pretty cool.
    Larry KE4DMG
    2022 F-350 KRU SRW LB - Airlift 5000+, ForScan, 37 RDS Aux Tank,
    2019 310GK-R - Sailuns; MorRyde IS; Disc Brakes; 20K Reese Goosebox
    Search kalakamods for my mods


  8. #8
    Seasoned Camper
    Join Date
    May 2017
    Location
    Middle TN
    Posts
    429
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    As long as that extra inch of diameter doesn't put your tires inside the min clearances necessary between tires and tires to frame... go for it.
    2022 Momentum 351M-R
    2019 Ford F450 Platinum CC 6.7L Powerstroke FX4; Truck Covers USA American Work Tonneau; B&W 25K hitch; Airlift 5000 Ultimate+ w/WirelessAir; ZRoadZ back-up lamps
    Gone: 2018 Reflection 28BH; 2017 Ford F350 Platinum CCSB 6.7L Powerstroke FX4; 2015 GMC Denali 2500HD CCSB Dmax
    Gone but still in the family: 2004.5 Chev 2500HD CCSB LTZ Dmax

  9. #9
    Site Team traveldawg's Avatar
    Join Date
    Aug 2017
    Location
    Florida Space Coast
    Posts
    3,853
    Blog Entries
    1
    Mentioned
    94 Post(s)
    Tagged
    0 Thread(s)
    I just found out that new Solitudes (and Momentums) can come with 17.5" tires. So I'm pretty sure I am good-to-go....

    Probably not going to make the change until the fall as I'd have to spring for new wheels too.
    Larry KE4DMG
    2022 F-350 KRU SRW LB - Airlift 5000+, ForScan, 37 RDS Aux Tank,
    2019 310GK-R - Sailuns; MorRyde IS; Disc Brakes; 20K Reese Goosebox
    Search kalakamods for my mods


  10. #10
    Long Hauler geotex1's Avatar
    Join Date
    Sep 2019
    Posts
    2,837
    Mentioned
    83 Post(s)
    Tagged
    0 Thread(s)
    Just a thought, look at your spring condition with some measurements and comparison side-to-side. You may find you can spend that tire money alternatively with fresh, higher capacity, additional leaf springs that give you better height along with the obvious benefits if your springs are getting tired. You already have addressed the other weak points so why not a grand slam!
    Rob & Nikki + Cloverfield
    2020 Grand Design Solitude S-Class 3350RL
    2015 RAM 3500 Longhorn Laramie Crew Cab, Long Bed, 4x4 Dually Cummins/AISIN

    Mountains of Pennsylvania

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

DISCLAIMER:This website is not affiliated with or endorsed by Grand Design RV, LLC or any of its affiliates. This is an independent site.