tireman9 Report post Posted September 3, 2020 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. Share this post Link to post Share on other sites
fatbill Report post Posted September 5, 2020 Thanks everyone... got em down to 95PSI all around, and will get axels weighed soon to compare with load charts.... Share this post Link to post Share on other sites
fatbill Report post Posted September 16, 2020 Just an update... I went to a Loves that had a CAT scale, and was able to get a weight on each axel, although, not 4 corners... Weight is fully loaded with 4 adults and all our stuff.... Steer Axel = 5740 Drive Axel = 12320 Gross 18060 So I'm good if I'm reading charts correctly... I'm at 95 PSI... probably drop them down to 90 to give me a margin.... Share this post Link to post Share on other sites
wildebill308 Report post Posted September 16, 2020 Good, now you have some good information to base your tire preshure on. Something to think about. When I don't have a corner weight and am working on using the whole axl weight. I use 60/40 to determine the air preshure not 50/50. This gives you a little cushion incase it isn't perfectly equally loaded. Yours might be but I know mine isn't. Bill Share this post Link to post Share on other sites
fatbill Report post Posted September 17, 2020 I know I'm being a pain and I apologize... just want to get this correct and be sure I have this straight in my thick head.... Factoring in a 15% cushion, and the additional weight of full water and fuel, I THINK I'm looking at 3500 LB on the front tires, and 3700 LB on the rears. according to the load inflation chart, thats 80PSI on the front and 85-90 PSI on the rear.... ? Share this post Link to post Share on other sites
hermanmullins Report post Posted September 17, 2020 18 hours ago, fatbill said: Just an update... I went to a Loves that had a CAT scale, and was able to get a weight on each axel, although, not 4 corners... Weight is fully loaded with 4 adults and all our stuff.... Steer Axel = 5740 Drive Axel = 12320 Gross 18060 So I'm good if I'm reading charts correctly... I'm at 95 PSI... probably drop them down to 90 to give me a margin.... 1 hour ago, fatbill said: I know I'm being a pain and I apologize... just want to get this correct and be sure I have this straight in my thick head.... Factoring in a 15% cushion, and the additional weight of full water and fuel, I THINK I'm looking at 3500 LB on the front tires, and 3700 LB on the rears. according to the load inflation chart, that's 80 PSI on the front and 85-90 PSI on the rear.... ? Fatbill, do I see a conflict in your numbers? Herman Share this post Link to post Share on other sites
fatbill Report post Posted September 17, 2020 Well... I'm adding some weight for a cushion, and the fuel and water that was not in it when I had the thing weighed..... Share this post Link to post Share on other sites
