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tireman9

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    Akron, OH
  • Interests
    Genealogy, Travel out West. Tires
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  1. Two things you must check when replacing tires. 1. The stated max load capacity molded on the tire sidewall. This should be stated in the tire company literature. 2. If you are not getting the identical 9not just close) size you MUST confirm the new tires have equal or greater load capacity than the old tires. Be careful with matching or higher Load Range. 3. If you change size be sure to confirm "Minimum Dual Spacing" You can learn more on dual spacing here
  2. I have two blog posts on Tire Recalls about tire registration. If your tires are registered you would get a letter from NHTSA maybe even before the info is published. You might want to revied the psots and register your tires. You will need the FULL DOT serial to complete the registration. https://www.rvtiresafety.net/2015/10/do-you-have-defective-tires-how-would.html https://www.rvtiresafety.net/2017/11/did-your-rv-company-or-dealer-follow.html
  3. The first concern should be Are the new tires rated for equal or greater load capacity? Once you have a "YES" then you can continue shopping. Note that there are a couple items in the Michelin line that are unique to Michelin. Either the specific size or the load capacity of the Michelin is a few pounds different than seen in other brands. This is because some Michelin tires were originally developed in Europe to metric dimensions and the conversion to Si (inches & pounds) requires some rounding so you need to be a smart shopper. Also for load. Have you learned the "4 corner" weights of your coach? You definitely need to ensure the tire you select can support at least that much load and a +argin of 15% would be a good idea if possible. FYI Firestone tires are made with the same or similar materials on the same equipment in the Bridgestone plant in Tenn. The sidewall will say "Made in USA"
  4. Looked at the system install video. Not sure how this would be a good unit for RV owners. We already have internal TPM systems that do not require a wire harness in the market. Also not sure about transferring the sensor from one tire to another after the tire either wears out or ages out. But if you want to go this way and have considered my questions I would say go for it if you do not want the simpler, less expensive screw-on sensor units already used by many RV owners.
  5. For the past few years I have been offering Seminars at the Int'l Conventions on the topic of Genealogy. Based on attendance and feedback this is an interest to many members of the FMCA family. While I was not able to present in 2020 I am planning on again delivering seminars at 2021 conventions starting in Perry. But not everyone can attend. With so many not getting out due to Covid I have been giving some Zoom meetings to local Genealogical societies on tracing your family tree. This might be something I can do for more members of the FMCA family. Researching your Family Tree can present opportunities to travel the country as you do your research. I would like to test the waters with a small group with a more "hands-on" approach and rather than just delivering a speech, I would like to work with folks just starting out and can schedule a few half hour Zoom meetings for groups less than 10 folks. If interested please message me so I can gauge the level of interest and see how to manage a few Zoom meetings. Possible Topics: "Where do i start?" "How to manage and organize your information" " Where can I find information on-line for free" 'Free Genealogical programs"
  6. Comments on a number of posts. 1. Tire Industry standard as published by the "Tire & Rim Association" says to adjust tire pressure "When tires are at the prevailing atmospheric temperature and do not include any build-up due to vehicls operation". The 57 members of the association include Accuride, Cooper, Goodyear, Bridgestone, Continental, Michelin, Pirelli, Sumitomo, Titan, Toyo, Kenda, Maxxis, Dunlop, Hankook, Kumho, Nexen, Yokohama, Sailun and others. 2. I don't know why some feel the "prevailing atmospheric temperature" is some specific temperature i.e. 70 or 65F as I have been reading in some other RV forum threads. 3. Cars have placard inflation numbers that yield a reserve load capacity of 20% to 30% while most RVs have placard numbers that provide 0% to 10% and this excludes the 52% that we know have overloaded tires and/or axles based on the tens of thousands of weighings done by RVSEF. 4 I know no no one in the tire industry that is suggesting you adjust your tire pressure multiple times a day. The general recommendation is to adjust, in the morning before the tires are warmed by the Sun or by operation. 5 Cross country busses generally set their pressure at the tire sidewall pressure and never really completely cool down enough to end up in overload. 6 I do not know of any car company since 2000 that intenionally under-inflated their tires trying to get better ride. Most have designed their suspension (springs, shocks & bushings & seats) to provide the soft ride they want. They still provide significantly more load Reserve than seen on almost any RV. CAFE dictates that they shoot for better MPG because they have significan financial incentive to get better MPG.
  7. I have a page in my tire blog that I try to keep up to date with links to various Load & Inflation tables. I think you will find that almost all tires follow the same numbers with the exception of a handful of Michelin 22.5 items. so if you can't find a chart from your tire brand you can use any of the others except Michelin. If anyone finds a broken link or error please let me know and I will do my best to fix the problem. RE how to do the calculations: Here is a worksheet from Bridgestone for doing the calculations if you find a scale that allows one side weighing. If you can only get the scale readings for your individual axles as you would from CAT scales or at other truck stops, I recommend not simply dividing the scale reading by 2 as very few RVs have their load evenly split 50/50 side to side. I suggest that at a minimum assume one end of an axle is carrying at least 51% of the axle load. If you have a big slide on one side or 2 slides on one side then I suggest you calculate 52 or even 53% of the axle load on one end. Residential refrigerators also can create an unbalance. All of this shows the importance of at least one time getting a scale reading for each tire position (a pair of rear duals counts as one position). Using those numbers calculate your side to side split percentage and use that from then on unless or until you get another "4 corner" scale reading at an FMCA Convention or similar. We have found that some RVs had as much as 1,000# more load on one end of an axle so the unbalance can be consequential. Many times local building supply or sand & gravel or farm feed supply locations have small scales that can give the one side reading so you can use the Bridgestone sheet above. When consulting the tables ALWAYS use the load on the heavy end of an axle to look up the MINIMUM inflation. ALWAYS go up in inflation to the next 5 psi box. Don't try to split the difference. I also suggest you add 10% to the table number so you can avoid "chasing your tail" with daily temperature induced pressure changes. Finally ALWAYS set all tires on an axle to the same inflation level and use a TPMS. Here is my blog post on how I program my TPMS.
  8. If something gets in the core the only "fix" is to replace the core itself. There is no opening between the stem and core like n a water faucet so drying to clear the dust by removing the core will not work. Re over tightening the core. Spec is 2 to 5 in-Oz. I just tested a neat tool from SLIME. A Torque limiting tool. $5 at Autozone. I tested it and it "clicks" and releases at 3.5 in-oz. Will be posting on my blog soon as a tool I "Endorse".
  9. I like your approach. Until you get actual individual tire position weights you should be good.
  10. tireman9

    New Tire Questions

    Yes in the "old bias tire days" the number of body piles would increase with an increase in "ply rating" i.e. Load Range. One main difference between Sailun and Firestone is there is no dealer network with tires in stock for Sailun. Yes in general more flex does generate more heat IN THE SAME TIRE. Without data I don't know how we can make a comparison between different tires especially across manufacturers.
  11. I have a number of posts on valves and valve cores in my blog. Too much to re-post here. BUT Yes valve cores can stick open and it may be possible the TPMS holding the core open may have contributed to this issue. Just get some new cores at any auto parts store. Don't over-tighten. Read this post on how tight is tight enough. 3/4 turn after air leak stops. Use a metal valve cap with an internal gasket if not running your TPMS.
  12. Interesting report that basically says passenger and Light truck tires should be removed from service before year 7. RE the observation on the "death and injury" chart is only reporting total number not the rate. Without the sales number making a conclusion can be very misleading.
  13. tireman9

    New Tire Questions

    Where are you finding the information on "heavier" sidewalls? Higher Load Range can be achieved in a number of different ways. Without seeing the actual specification and actual test results and an actual tire section there are just too many assumptions being made. I once was able to "upgrade" a LR-D to a LR-E in LT type tire with only a change in the bead wire.
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