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tireman9

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Everything posted by tireman9

  1. Commercial tire dealer may not understand RVs. Get on a CAT scale. Assume one axle end has 53% of the total axle load and use Load/Inflation tables to learn your Cold Inflation Pressure. Get the tire to a Herculese tire dealer and get it inspected. Tires should not have bubbles in sidewall.
  2. tireman9

    Tire wear question

    Can't really see tire wear in that picture BUT do the two tires measure the same OD? (OC is easier to measure once off the trailer.) If OC is more than 1/4" different you MUST have the larger tire inspected ASAP for possible belt problems. here is more info on that https://www.rvtiresafety.net/2018/05/st-tire-belt-separation-autopsy-how-to.html
  3. tireman9

    Tire PSI

    Here is the Double Coin Load charts. http://www.doublecointires.com/wp-content/uploads/Double-Coin-TBR-Data-Book.pdf While I didn't check all the numbers I believe you will see they match all other tire company tires of same size & LR except for a few Michelin tires that are sometimes different by 5 psi or have load capacity difference of a few hundred pounds. When an RV size tire is made the tire company doesn't know what vehicle it is going on. Only time a tire company knows that info is for regular production cars and smaller trucks. Load charts have been around for more than 50 years so the tire companies know how to make tires to perform to those. Getting on a truck scale to learn your actual axle loads is easy, Low cost (I believe less than $20). At FMCA Conventions RVSEF offers a real service to measure each tire position as very few RV have 50/50 side to side laod split which is the assumption for the 80psi on the Federal stickers. I would support 90 - 95 until you get individual position scale weights. Be sure you have a 15% Reserve Load capacity above your ACTUAL heaviest end per axle. if possible. Get and run TPMS and be sure it is programed correctly.
  4. All tires have "Made In xxxx" molded on the sidewall so no need for bar code translation.
  5. Well the "SmartWay" program is a reasonable way of comparing fuel efficiency of tires. There are specific performance standards a tire has to meet to get the rating. In general you can compare across brands as the "Big Guys" will display that Logo in their literature if it meets the standards. A claim for "better fuel economy" without the SmartWay logo is what you call propaganda. I believe that when you look at same size, Load Range and type (Rib vs Rib or Traction Vs Traction ) you can figure similar fuel economy. If you go to the Goodyear web site The Endurance LHS is not included in the Goodyear RV tire data book. It is on pg 14 of the GY Commercial tire Data Book under "Long haul" It does show SmartWay but as a "Long Haul" it may not deliver equal MPG as an "RV" tire which are normally considered Regional. You would need to talk with someone at GY Commercial truck tires
  6. "more fuel efficient" than what tire? Do they carry the EPA "Smart way" seal?
  7. I agree with Herman that buying scales is expensive. I would not do that. Have you checked with RVSRF to see what they are doing? If you travel to Oregon or WA you can look for "State Scales" as I posted HERE. I have a dozen posts on this topic on my blog so check "weight" in the keyword list on lower left or check these sites https://www.publicscaleslocator.com/ https://www.dieselboss.com/service.htm https://www.allstays.com/c/weigh-scales-locations.htm
  8. Here is a 1 hour YouTube of my ZOOM talk on tires in RV application.
  9. My brother asked me " Why should I NOT buy a "new" 2019 Thor 37' class A toy hauler? Know of any hidden mechanical issues/history with Thor "Outlaw" models?"
  10. Some of you might have attended one of my seminars on RV tires at a Int'l Convention. I was scheduled for Tuscon and Lincoln but both were canceled. I have been doing a couple of ZOOM meetings and wonder if and how many would like FMCA to have me present via ZOOM a seminar? I have one focused on Motorhome application and one on trailer application. The trailer works for both RV trailers and for those with Motorhomes that pull a trailer (Box or car hauler or boat trailer type) Drop me an email and if there is sufficient interest I think it can be worked up. Tireman9 at Gmail.com
  11. Some of you might have attended one of my seminars on RV tires at a Int'l Convention. I was scheduled for Tuscon and Lincoln but both were canceled. I have been doing a couple of ZOOM meetings and wonder if and how many would like FMCA to have me present via ZOOM a seminar? I have one focused on Motorhome application and one on trailer application. The trailer works for both RV trailers and for those with Motorhomes that pull a trailer (Box or car hauler or boat trailer type) Drop me an email and if there is sufficient interest I think it can be worked up. Tireman9 at Gmail.com
  12. I have had some issues with the accuracy of information published by Simple Tire in the past For Sailun I prefer to use the information published by Saiun tire company. The tire with Part Number 5540993 is an ST type and Sailun identifies it as design S637T not S637 We need to be careful when ordering tires.
  13. First off. Not "nearly all" tire companies make ST type tires with Goodyear being the only "major" tire company that does. If your RV manufacturer indicated LT235/85R16 LRE on the certification sticker aka "Tire Placard" Then that should be ok but it might just meet the minimum requirements, so an alternative might be reasonable to consider. Not sure about going to a "Traction" tread pattern. Usually those tires have deeper tread which means more heat which is not good. It would also help if you could tell us your actual scale weights for each tire position or at a minimum the actual scale weight for each axle. The Stated GAWR from the sticker would also be helpful Not sure what the Goodyear "LR" construction is. Almost all modern radials have steel belts so there might be some confusion. I did not look up all the tires on your list but I do not think any are "all steel" construction. I believe there are Sailun S637 and S637T which are not the same tire. the S637 smallest is a 17.5 rim tire and are "Commercial" grade truck tires. The S637T is their HD "all steel" trailer tire. You need to be careful and very specific when ordering tires or you may not get what you think you are ordering. With a little more information (weights) we should be able to offer additional suggestions. Would the Discount tire guy explain why he would not put the same size / Type/ Load range tire back on the RV?
  14. Are you sure? So you say your tires are out of balance. You Sure that's the reason for the bad ride? Maybe you need a more experienced tire tech.
  15. Sorry, but I have no specific info. If Fuel Economy is important to you I suggest you research EPA "Smartway" certified tires. The major brands identify these tires in their data book as being compliant with the EPA and CARB requirements for better fuel economy. Your tire size may limit your choices.
  16. The production dates for the tire involved are different. The Plant(s) involved are not both listed. I am thinking that since people seem to have so much difficulty finding and reading the DOT serial it may no longer be shown in all recall announcements. If I learn anything I will post the info here.
  17. Another brand same size NHTSA Recall ID Number : 20T011 Synopsis : American Pacific Industries, Inc. (American Pacific) is recalling certain Gladiator X-Comp A/T tires, size LT285/75R16, Load Range E and with DOT date codes 0718 to 0420. Due to a manufacturing issue, the sidewall may separate from the tire. As such, these tires fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 139, "New Pneumatic Radial Tires for Light Vehicles." Sidewall separation can lead to tire failure, increasing the risk of a crash. American Pacific will notify owners, and dealers will replace the tires, free of charge. American Pacific has not yet provided a notification schedule. Owners may contact American Pacific customer service at 1-661-702-0988
  18. NHTSA Recall ID Number : 20T009 Synopsis : Vee Tyre and Rubber Co., Ltd. (Vee Tyre) is recalling certain Taiga A/T tires, size LT285/75R16. Due to a manufacturing issue, the sidewall may separate from the tire. As such, these tires fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 139, "New Pneumatic Radial Tires for Light Vehicles." Sidewall separation can lead to tire failure, increasing the risk of a crash. Vee Tyres will notify and reimburse owners the cost of the tires along with any service fees. This recall is expected to begin June 30, 2020. Owners may contact Vee's customer service at 1-917-863-2422. Vee's numbers for this recall are 6MSLD8 2117 and 2217.
  19. Bill, First I have to apologize to you. I misread your post. Too much of a hurry. OK the load capacity of Terry's ST tires is 3420# @ 80 Psi. I do find an LT285/70R16 LR-E rated for 3640#@80 psi but the 285 requires an 8.5" wide rim while the original ST 235 is probably on a 6.5" wide rims so we would be required to change wheels. Basically LT tires, with only a couple exceptions, top out at LR-E so we are not going to get an increase in load capacity in LT type tires. Now maybe a better approach would be to go from 16" to 17.5" diameter wheel and a LR-F truck tire. Hankook AH11 215/75R17.5 F/12PR might be an option but again this requires a wheel change. Unless Terry has a serious overload program I think that staying with ST type is the best bet even though none of the 3 companies in the FMCA discount program make St type tires.
  20. Bill, You need to be careful. An ST 235/80R16 LR-E is not really an Exact match for an LT235/80R16 LR-E as the load capacity of the LT tire is lower than the ST that you need based on GAWR There are LT type tires that have greater load capacity than your ST but they either are larger or have a higher Load Range and need higher psi which may exceed your wheel limit. Do you know your actual scale readings on your tires with your trailer fully loaded? You can learn more about ST type tires on my RVTireSafety.Net blog My direct email is Tireman9@gmail and as an FMCA member you are welcome to contact me directly so we can see what your options are.
  21. Tire size comparison. Nothing basically wrong with web site tire size calculations but for "Dual" (rear side by side on many Motorhomes) "Minimum Dual spacing is a critical dimension that you will probably only find in the tire company data sheets. Most can be found on-line. I have a post I try and keep up to date with links to many different tire company Load / Inflation and specification information. (Let me know if you find a broken link)
  22. Maybe but I have said it is possible to balance a cinder-block. Finished it this weekend. Will be posting on my blog shortly but here is a picture of the block and my bubble balance machine.
  23. RayIN Good memory on my post from Nov 2011. HERE is a link
  24. While I try and keep my seminars and posts "brand neutral" I will suggest that one thing to consider when selecting new tires is availability. You might save $100 by getting "Mud-Wumper 3's" from Billy Jo Bob's Cheap tire and bait Emporium, but go ol' Billy Jo will only provide service in a 10 mile radius of his single outlet store. Go on-line and see if the tire company you are considering has a "find-a-dealer" feature on the company web site and confirm you can get service wherever you expect to be traveling. You can get a sidewall cut in any of the 49 states and Canada but can you easily get a replacement tire without having to Fed-Ex a tire to your location ow wait a couple weeks?
  25. I have a Class-C (2016) which has 17583 mi which replaced a similar Class-C (2008) at 42,567 mi. The 2008 had Firestone Transforce HT LT225/75R16 LR-E tires. Made the trip to Redmond OR from Ohio Plus Perry, GA and Madison, WI with no issues. The 2016 has General Grabber HTS as OE, also LT225/75R16 LR-E tires. Been to Gillett,WY, Perry and Maine coast with no issues.
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