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08-02-2013, 11:38 AM
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#1
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Senior Member
Join Date: Jul 2012
Location: TN
Posts: 645
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New Tires advice Class D vs E
Fixn to order new TT tires. 225/75R15 class C came on the TT. TT's GVWR is 8819. At least looking at going with GYM Class D's. Few bucks more I can go with class E's. I know there are opinions out there...
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Russ & Kim
2014 Alpine 3600RS
2007 Dodge Ram 3500 5.9 4X4
2008 Harley Davidson Road King 105th Anniversary
(2011-5 bad year)(2012-40)(2013-45)(2014-23)
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08-02-2013, 12:28 PM
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#2
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Senior Member
Join Date: Jun 2013
Location: Nebraska
Posts: 630
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IMHO I feel that anything to do with trailers or tow vehicles you should be trying to get the HIGHEST load rating you can from a tire to fit your wheel.
Needless to say I'd vote for spending the little bit extra now to possibly prevent a blow or and needing to replace a blow tire, or worse wreck truck or trailer!
No sense skimping when you are already buying them...
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TV- 2015 Ram 2500 CCLB 6.7 Cummins 3.42 gears
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08-02-2013, 12:49 PM
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#3
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Always Learning
Join Date: Nov 2011
Location: Four Corners, FL
Posts: 21,891
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If you go up to E-range tires, make sure your wheels can go up to 80psi.
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Officially a SOB with a 2022 Jayco Precept 36C
Checkout my site for RVing tips, tricks, and info | Was a Fulltime Family for 5 years, now we're part-timing on long trips
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08-02-2013, 03:10 PM
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#4
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Senior Member
Join Date: Jul 2012
Location: TN
Posts: 645
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60 psi.... Looks like class D's would be the ones, without changing rims too.
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Russ & Kim
2014 Alpine 3600RS
2007 Dodge Ram 3500 5.9 4X4
2008 Harley Davidson Road King 105th Anniversary
(2011-5 bad year)(2012-40)(2013-45)(2014-23)
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08-02-2013, 03:52 PM
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#5
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Member
Join Date: Apr 2013
Posts: 74
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During my research on tires, I read a good article about st and lt tires. The interesting part is what the guy called reserve. The e rated tires would just have more reserve than the d rated tire. I'd go with the e if money wasn't an issue.
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08-02-2013, 03:59 PM
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#6
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Senior Member
Join Date: Jul 2012
Location: TN
Posts: 645
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Quote:
Originally Posted by Frankm2
During my research on tires, I read a good article about st and lt tires. The interesting part is what the guy called reserve. The e rated tires would just have more reserve than the d rated tire. I'd go with the e if money wasn't an issue.
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Go with the E's and run them at 60 psi?
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Russ & Kim
2014 Alpine 3600RS
2007 Dodge Ram 3500 5.9 4X4
2008 Harley Davidson Road King 105th Anniversary
(2011-5 bad year)(2012-40)(2013-45)(2014-23)
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08-02-2013, 05:55 PM
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#7
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Member
Join Date: Apr 2013
Posts: 74
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Yea, or if you took it to a scale after you have it geared and know the weight, there are charts on the Internet which would tell you the correct air pressure, which should be at or below 60 psi.
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08-02-2013, 06:16 PM
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#8
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Senior Moment
Join Date: Jan 2013
Location: Weatherford, TX
Posts: 178
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Switched my trail express LR C tires out for Maxxis LR E tires and run them at 70psi cold. I have aluminum rims supplied to forest river by lionshead, I called them about the higher psi, they said just make sure you change the valve stems, I went with the stainless steel.
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08-02-2013, 10:23 PM
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#9
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Senior Member
Join Date: Jul 2012
Location: TN
Posts: 645
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Quote:
Originally Posted by rockport
Switched my trail express LR C tires out for Maxxis LR E tires and run them at 70psi cold. I have aluminum rims supplied to forest river by lionshead, I called them about the higher psi, they said just make sure you change the valve stems, I went with the stainless steel.
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That's interesting, that's the rims I have and their web site says 60 psi for the load on 15 inch rims...
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Russ & Kim
2014 Alpine 3600RS
2007 Dodge Ram 3500 5.9 4X4
2008 Harley Davidson Road King 105th Anniversary
(2011-5 bad year)(2012-40)(2013-45)(2014-23)
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08-02-2013, 10:45 PM
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#10
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Senior Moment
Join Date: Jan 2013
Location: Weatherford, TX
Posts: 178
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Quote:
Originally Posted by Road-King
That's interesting, that's the rims I have and their web site says 60 psi for the load on 15 inch rims...
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You wouldn't happen to have a link to that website would you. I couldn't find one.
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08-02-2013, 11:48 PM
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#11
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Senior Member
Join Date: Jul 2011
Location: Las Vegas, NV
Posts: 356
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Check the backside of the rim. It should be stamped with max pressure. Then discuss with tire store on running E's at lower pressure. I have 10 ply E on my 3002 w/ the alum rims running at 75 psi. Pulls sooooo much better than those sloppy C's that blew up!
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08-03-2013, 08:28 AM
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#12
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Senior Member
Join Date: Jul 2012
Location: TN
Posts: 645
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Quote:
Originally Posted by rockport
You wouldn't happen to have a link to that website would you. I couldn't find one.
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www.series06.com
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Russ & Kim
2014 Alpine 3600RS
2007 Dodge Ram 3500 5.9 4X4
2008 Harley Davidson Road King 105th Anniversary
(2011-5 bad year)(2012-40)(2013-45)(2014-23)
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08-03-2013, 08:35 AM
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#13
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Moderator Emeritus
Join Date: Mar 2008
Location: St. Paul, Minnesota
Posts: 3,369
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I sometimes wonder if it is really about the PSI on the rim rating. Or is it that they are really concerned about the load/weight that the rim will handle.
I went from C's to D's and limit my air pressure to 60 PSI.
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08-03-2013, 09:19 AM
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#14
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Senior Moment
Join Date: Jan 2013
Location: Weatherford, TX
Posts: 178
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Quote:
Originally Posted by Road-King
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Thanks for the link, I will contact them to find out if the psi can go up as long as you don't exceed the 2150 load. As the chart shows their smaller, lighter rims have lower load rating with higher psi.
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08-03-2013, 11:16 AM
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#15
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Member
Join Date: Apr 2013
Posts: 74
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Quote:
Originally Posted by rockport
Switched my trail express LR C tires out for Maxxis LR E tires and run them at 70psi cold. I have aluminum rims supplied to forest river by lionshead, I called them about the higher psi, they said just make sure you change the valve stems, I went with the stainless steel.
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Interesting. My 2014 came with d rated tires at 70 psi. I would have been tempted to go down to 65 psi, except an article I read said the st tires could be run with an extra five ps fori extra load capacity. I think that was the reason. The 300 BH and D rated tires are to close to the limits of the tire. I'm switching them to e rated tires after i recover from vacation. I am eager to check the value stems to see what mine has.
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08-03-2013, 01:27 PM
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#16
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Member
Join Date: May 2013
Location: Danville, VA
Posts: 30
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Just to stir this pot a little more. I have a 2014 Rockwood that has those Trail Express China tires on it. I want to replace them with Maxxis tires. My question is tire height. The Trail Express tires are 225/75/R15 load range C. I want to replace them with Maxxis 225/75/R15 load range D. Will the tire height be different and will I have enough space between the two tires on each side of the trailer.
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08-03-2013, 01:39 PM
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#17
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Senior Moment
Join Date: Jan 2013
Location: Weatherford, TX
Posts: 178
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Quote:
Originally Posted by buckster
Just to stir this pot a little more. I have a 2014 Rockwood that has those Trail Express China tires on it. I want to replace them with Maxxis tires. My question is tire height. The Trail Express tires are 225/75/R15 load range C. I want to replace them with Maxxis 225/75/R15 load range D. Will the tire height be different and will I have enough space between the two tires on each side of the trailer.
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Both tires same size, I'm not aware that load range changes tire dimensions. I went from the c load range to e load range no problems.
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08-03-2013, 02:13 PM
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#18
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Senior Member
Join Date: Jul 2012
Location: TN
Posts: 645
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Quote:
Originally Posted by buckster
Just to stir this pot a little more. I have a 2014 Rockwood that has those Trail Express China tires on it. I want to replace them with Maxxis tires. My question is tire height. The Trail Express tires are 225/75/R15 load range C. I want to replace them with Maxxis 225/75/R15 load range D. Will the tire height be different and will I have enough space between the two tires on each side of the trailer.
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I'm fairly sure the first number is width in millimeters and the second is the hight ratio to the width. So a 225/75R15 class C, should be the same dimensions as a 225/75R15 class D or E.
__________________
Russ & Kim
2014 Alpine 3600RS
2007 Dodge Ram 3500 5.9 4X4
2008 Harley Davidson Road King 105th Anniversary
(2011-5 bad year)(2012-40)(2013-45)(2014-23)
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08-06-2013, 02:52 PM
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#19
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Senior Moment
Join Date: Jan 2013
Location: Weatherford, TX
Posts: 178
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Ok. I talked with Scott at series 06, stated that running the 80 psi would not be an issue on the aluminum rims. Only concern is the valve stem, make sure your tire dealer upgrades those to handle the increased psi. I went with the stainless steel stems and am running my maxxis load range E tires at 70psi cold.
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08-07-2013, 08:18 AM
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#20
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Senior Member
Join Date: Jul 2012
Location: TN
Posts: 645
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Quote:
Originally Posted by rockport
Ok. I talked with Scott at series 06, stated that running the 80 psi would not be an issue on the aluminum rims. Only concern is the valve stem, make sure your tire dealer upgrades those to handle the increased psi. I went with the stainless steel stems and am running my maxxis load range E tires at 70psi cold.
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Thanks for that info. Helps with the decision. ..
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Russ & Kim
2014 Alpine 3600RS
2007 Dodge Ram 3500 5.9 4X4
2008 Harley Davidson Road King 105th Anniversary
(2011-5 bad year)(2012-40)(2013-45)(2014-23)
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