โJun-12-2014 05:55 PM
2019Keystone,Impact26v-TH,solarpower
,Lithium Batt.. all to take our 2012 Yamaha FJR along to ride..โJun-27-2014 05:38 PM
โJun-27-2014 07:49 AM
Me Again wrote:wantabe351 wrote:
I ordered Hercules "Power STR" ST235/85R16 (LRF) 3960lbs@95psi with a L speed rating (75mph)..4 tires with be delivered next week..I liked Hercules tires years ago so hope they do me well again...each tire will have a load increase of 500lb more/ axle safty margin of 1,000lb..speed safty margin of 10 mph more..(75mph). bought the set for 520$ delivered..After this im going for the 17.5 wheel/tire combo..Suspension still the same only the tires have been upgraded,so far
Depending on the year of your Montana the rims may not be rated beyond 80 lbs inflation. It was not until sometime in 2010 that they upgraded the rims installed OEM to ones capable of tires beyond LRE.
Chris
โJun-26-2014 10:47 AM
wantabe351 wrote:
I ordered Hercules "Power STR" ST235/85R16 (LRF) 3960lbs@95psi with a L speed rating (75mph)..4 tires with be delivered next week..I liked Hercules tires years ago so hope they do me well again...each tire will have a load increase of 500lb more/ axle safty margin of 1,000lb..speed safty margin of 10 mph more..(75mph). bought the set for 520$ delivered..After this im going for the 17.5 wheel/tire combo..Suspension still the same only the tires have been upgraded,so far
โJun-26-2014 10:47 AM
โJun-26-2014 09:54 AM
2019Keystone,Impact26v-TH,solarpower
,Lithium Batt.. all to take our 2012 Yamaha FJR along to ride..โJun-26-2014 09:38 AM
2019Keystone,Impact26v-TH,solarpower
,Lithium Batt.. all to take our 2012 Yamaha FJR along to ride..โJun-19-2014 01:07 PM
Tireman9 wrote:NC Hauler wrote:Tireman9 wrote:
As we all know it is the air that carries the load. Basically the more air volume (larger tire) and higher inflation pressure the higher the load capacity.
Now as we also know it is Heat that kills tires the faster rubber is "bent" through deflection the hotter it gets. A tire of size S and Load L at inflation pressure P will run hotter if it is run at speed 75 mph i.e. more bends per minute than when run slower say at 65 mph.
Now it is possible to vary L and/or P to achieve the same temperature when a tire is run at 75 as when at 65.
I do not understand the apparent confusion about these basic engineering principles.
If a tire company wants to provide a special 'non-standard" tire for a small special part of the tire market by using a "non-standard" set of Load, Pressure and Speed then I see no reason to be confused. I would think RV owners should be glad that a tire company made an effort to provide more options to the RV owner.
You've "assumed" several things in your above post. "Now as we also know" is presuming that "we also know"..... what you know from 40 years in the business...most don't know.
Next is your statement:" I do not understand the apparent confusion about these basic engineering principles." Not everyone is an Engineer and not everyone knows, "basic TIRE Engineering principles" or formula's for said processes....My Engineering education started out in 1968 in Electrical Engineering, then US Air Force, then I changed fields in 75' to Mining Engineering, nothing about tire manufacturing processes in either of those two fields...The rest, through my life has come with more schooling and "OJT" . All that to say, I can't assume most would know "basic principles" of particular fields...Thus, the reason for ALL the many threads on tire education/misinformation/information.
I would say that most rv owners are oblivious to tire information on rv's.. until they hit a forum like this or do the research. Until I got into some tire manufacturing myself YEARS ago with my company, I wasn't aware of all the specifics or "formula's" until I was involved in the manufacturing process. Same with ABS, ESC/ESP systems and brake calipers, it all comes with education and on the job training..So if I discuss these components with someone asking questions about them, , I don't 'assume" everyone knows how they work or the R&D put into the development and manufacturing of said products...
Thus the reason for all these tire threads and any other threads asking for information on "whatever" that come up on these and other forums...
NC you are correct and I was wrong to write in the manner I did. My appologies. I've been spending too much time with the folks that read my RV Tire Blog where these concepts have been covered.
โJun-19-2014 11:50 AM
NC Hauler wrote:Tireman9 wrote:
As we all know it is the air that carries the load. Basically the more air volume (larger tire) and higher inflation pressure the higher the load capacity.
Now as we also know it is Heat that kills tires the faster rubber is "bent" through deflection the hotter it gets. A tire of size S and Load L at inflation pressure P will run hotter if it is run at speed 75 mph i.e. more bends per minute than when run slower say at 65 mph.
Now it is possible to vary L and/or P to achieve the same temperature when a tire is run at 75 as when at 65.
I do not understand the apparent confusion about these basic engineering principles.
If a tire company wants to provide a special 'non-standard" tire for a small special part of the tire market by using a "non-standard" set of Load, Pressure and Speed then I see no reason to be confused. I would think RV owners should be glad that a tire company made an effort to provide more options to the RV owner.
You've "assumed" several things in your above post. "Now as we also know" is presuming that "we also know"..... what you know from 40 years in the business...most don't know.
Next is your statement:" I do not understand the apparent confusion about these basic engineering principles." Not everyone is an Engineer and not everyone knows, "basic TIRE Engineering principles" or formula's for said processes....My Engineering education started out in 1968 in Electrical Engineering, then US Air Force, then I changed fields in 75' to Mining Engineering, nothing about tire manufacturing processes in either of those two fields...The rest, through my life has come with more schooling and "OJT" . All that to say, I can't assume most would know "basic principles" of particular fields...Thus, the reason for ALL the many threads on tire education/misinformation/information.
I would say that most rv owners are oblivious to tire information on rv's.. until they hit a forum like this or do the research. Until I got into some tire manufacturing myself YEARS ago with my company, I wasn't aware of all the specifics or "formula's" until I was involved in the manufacturing process. Same with ABS, ESC/ESP systems and brake calipers, it all comes with education and on the job training..So if I discuss these components with someone asking questions about them, , I don't 'assume" everyone knows how they work or the R&D put into the development and manufacturing of said products...
Thus the reason for all these tire threads and any other threads asking for information on "whatever" that come up on these and other forums...
โJun-19-2014 08:44 AM
fj12ryder wrote:
I believe you mean "rim width of 6.5 inches". Otherwise that would be a very small tire for a 5th wheel. ๐
โJun-19-2014 07:52 AM
โJun-19-2014 07:34 AM
โJun-19-2014 06:55 AM
wantabe351 wrote:
...On a Cat Scale my Montana axle weight is 12,655lbs with 7k axles(axle tag) but a tire limit of 6750lbs...My tires are the Goodyear Marathons 235/85-16e's....now after the third tire going bad.. last week was my third tire..tread is deformed from belt elongation...2011 Montana3400L with W/D and a Gen is heavy but not over weight(limit of 15,650lbs)..so when i get home Im going for all new tires I want a LRG tire but its hard to find a good tire,but going to a 17.5 rim/tire there a about 7 good brands to choose from..Now Herecules has a LRF and Kenda has a LRG and both are 235/85-16. the rims on the 5er are rated for 110psi so the rims i have will work.....any thoughts
โJun-19-2014 05:55 AM
Me Again wrote:
....Lots of people are hanging their hats on this Nylon overlay, and we still read a lot about Tow Max(added the overlay in recent years) and Marathon failures. Both of these are more widely used on RV trailers, as they are standard fair from Tredit. http://www.tredittire.com/Radial-Tires-C8.aspx
So best of luck with them and keep us informed.
Chris
โJun-19-2014 02:02 AM
Tireman9 wrote:
As we all know it is the air that carries the load. Basically the more air volume (larger tire) and higher inflation pressure the higher the load capacity.
Now as we also know it is Heat that kills tires the faster rubber is "bent" through deflection the hotter it gets. A tire of size S and Load L at inflation pressure P will run hotter if it is run at speed 75 mph i.e. more bends per minute than when run slower say at 65 mph.
Now it is possible to vary L and/or P to achieve the same temperature when a tire is run at 75 as when at 65.
I do not understand the apparent confusion about these basic engineering principles.
If a tire company wants to provide a special 'non-standard" tire for a small special part of the tire market by using a "non-standard" set of Load, Pressure and Speed then I see no reason to be confused. I would think RV owners should be glad that a tire company made an effort to provide more options to the RV owner.