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Car Forum / Driving, Maintenance, Tuning / RVs / February 20075th wheel tire question
I need to buy tires for a 29 foot, 5th wheel RV trailer. The registration says it is just under 9000 lbs. It currently has four 225/75R x 15D tires. What would you recommend for replacement tires. Size and brand ? John >I need to buy tires for a 29 foot, 5th wheel RV trailer. The >registration says it is just under 9000 lbs. It currently has four >225/75R x 15D tires. What would you recommend for replacement tires. >Size and brand ? >John What capacity axles does it have on it because tire capacity should match or exceed axle capacity more so than rated GVW ----------------- TheSnoMan.com Same size, Goodyear marathon.  SignatureSteve Barker >I need to buy tires for a 29 foot, 5th wheel RV trailer. The registration >says it is just under 9000 lbs. It currently has four 225/75R x 15D tires. >What would you recommend for replacement tires. Size and brand ? > John > I need to buy tires for a 29 foot, 5th wheel RV trailer. The > registration says it is just under 9000 lbs. It currently has four > 225/75R x 15D tires. What would you recommend for replacement tires. > Size and brand ? > John Same size, but I would go to an ST225/75R x 15E, regardless of what weight rating your axles are these tires will carry your GVWR. They are not going to put an axle on the rig that is not rated to carry the rated load. This is, granted a little over kill, but I would much rather have the odds in my favor. I carry 2,000 lbs more GVWR on my 5th wheel and have these tires. SignatureCan't we all just get along? BILL P. Just Me & DOG >They are not going to put an axle on the rig >that is not rated to carry the rated load. Not excatly true. some TT's have very marginal axles under them to save manufacturing costs. You always want tires to atl east equal or exceed axle capacity independant of rated GVW if for no other reason than safety. ----------------- TheSnoMan.com > I need to buy tires for a 29 foot, 5th wheel RV trailer. The > registration says it is just under 9000 lbs. It currently has four > 225/75R x 15D tires. What would you recommend for replacement > tires. > Size and brand ? > John If you got good service from those, why not replace with the same tire? If you change brands, be sure the tire is labeled ST and be aware that in trailer tires, if you go to load range E as has been suggested, they require 80# air pressure to carry the same weight as the load range D carry at 65# air pressure AND your rims MAY ONLY be RATED at 65 PSI. Tom J who get his trailer tires from Discount Tire (but not Carlisle anymore) Tom J wrote: >>I need to buy tires for a 29 foot, 5th wheel RV trailer. The >>registration says it is just under 9000 lbs. It currently has four [quoted text clipped - 15 lines] > who get his trailer tires from Discount Tire (but not Carlisle > anymore) I stand corrected, the current rig I have is running ST-LRD-8PR tires my tow vehicle is running LTX-LRE. According to the following charts, you are incorrect about the load a tire can carry at the same pressure. Never the less the stated size he has does not come in an E load class, but the ST tire can carry 330# more than a non ST at 50psi. If he aired his tires to carry his stated GVWR of 9,000/2,250per tire he would not be exceeding 50psi, although all late model wheels are rated at 65psi. (16X6OJ) I run mine at 65psi as the load rating data plate calls for. If his load data plate located outside, usually on the left of the rig, calls for a maximum of 65psi, he can reduce to what ever his rig weighs out to, based on the chart on the tires. But I never do that, contrary to Tire Will, I always assume I am at maximum load capacity. http://www.goodyear.com/rv/pdf/rv_inflation.pdf SignatureCan't we all just get along? BILL P. Just Me & DOG I see where "Tom J" <tomnews@earthlink.net> contributed: >If you change brands, be sure the tire is labeled ST and be aware that >in trailer tires, if you go to load range E as has been suggested, >they require 80# air pressure to carry the same weight as the load >range D carry at 65# air pressure AND your rims MAY ONLY be RATED at >65 PSI. That's partly correct, partly wrong. The part about the wheel pressure rating is a good caution. But I think you're mistaken about the rest. E-rated tires have higher load ratings - but only at higher pressures. Will Sill Don't worry about what people think, they don't do it very often. > I see where "Tom J" <tomnews@earthlink.net> contributed: > [quoted text clipped - 13 lines] > > Will Sill You are correct. I was trying to get across that many/most trailer wheels are only rated to carry the original tire and any increase in tire carrying capacity usually requires a change in rims TO BE SAFE. Tom J "Tom J" <tomnews@earthlink.net> wrote: >> I need to buy tires for a 29 foot, 5th wheel RV trailer. The >> registration says it is just under 9000 lbs. It currently has four [quoted text clipped - 8 lines] > require 80# air pressure to carry the same weight as the load range D > carry at 65# air pressure AND your rims MAY ONLY be RATED at 65 PSI. Tom doesn't understand the difference between Load Rage D and Load Range E tires. For the same tire size, type and manufacturer, the Load Range E tire has *exactly* same load-carrying capacity as the Load Range D tire at 65 PSI. The Load Range E tire has a higher maximum load-carrying capacity because it can be inflated to a higher inflation pressure than can the Load Range D tire. SignatureD.J., N8DO; FMCA 147762 dj[underscore]osborn at yahoo dot com > I need to buy tires for a 29 foot, 5th wheel RV trailer. The > registration says it is just under 9000 lbs. It currently has four > 225/75R x 15D tires. What would you recommend for replacement tires. > Size and brand ? > John I sure was not aware a person had to do a bunch of research just to replace the tires. If it were me, I think I would put the same size tires back on it with an upgrade of the ST. Make sure I had 65psi capable wheels and put what ever pressure is requires to carry the load pluss a good percentage over but not over any specs of the components involved. Uncle wrote:....Make sure I had 65psi capable wheels and put what ever pressure is requires to carry the load pluss a good percentage over but not over any specs of the components involved.<<< OH NO !!!!!! You mentioned the air pressure in tires !!!! We are now doomed to 400+ messages about what is the proper air pressure. SignatureJerryD(upstateNY) |
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