Reply
 
Thread Tools Display Modes
Old 05-28-2014, 12:06 AM   #1
Junior Member
 
TopTiger's Avatar
 
Join Date: Jan 2014
Location: Granbury, Texas
Posts: 25
Upsizing/Upgrading Tires on 8286WS FW

Looking to get rid of stock tires installed on my Rockwood 8286WS. Unit currently has 15" C load rated tires provided by Forest River. C load rated tires barely enough for 4000lb axles. Not sure Forest River stock wheels can even handle D load rated tires safely. Rims would have to hold at least 60psi. Also, stock tires seem to be losing 5 to 10 psi every ten days or so. Only have about 2K miles on them. Worry about blow out surprises on the road with these cheap tires. Been down to Discount Tire and am looking at moving up to new 16" alloy wheels so I can move up to higher pressure E load rated tires. Checked clearances by temporarily installing two 16" wheels on one side with LT225/75R-16/E1 Cooper tires. Appeared there is enough clearances all around. Lost about one inch between the two tires. Top clearance lost about same. 115Q E load rated tire is overkill with 2679lb load rating but hope upgrade will make towing safer and less worrisome going down the road. Any opinions or experience out there on moving up to 16" wheels or doing something similar?
__________________

__________________

IT'S GREAT TO BE ALIVE!
Bob & Marie
Rockwood 8286WS "Bunker"
Ford F-250XLT 2WD 6.4LD
TopTiger is offline   Reply With Quote
Old 05-28-2014, 09:25 AM   #2
Senior Member
 
Join Date: Oct 2013
Location: Georgetown, TX
Posts: 276
I upgraded to Hercules tires, both on my truck and trailer to get a higher load rating.

You can get either 205/75/15 in "D" rating- 2150lbs
or 225/75/15 in "D" rating - 2540lbs or "E" rating - 2830lbs.

So far 10,000 on the truck and 3,000 on the trailer - They do not lose air when stored. I looked at larger rim sizes but was a bit worried about "tire to trailer" clearance even with a "225" tire. Finally opted for 205/15 with a "D" rating. These tires were very "round and true on the balancer".

Here's a link to Hercules - http://www.herculestire.com/tire-gal...lty/power-str/
__________________

__________________
cadman99 is offline   Reply With Quote
Old 05-28-2014, 09:30 AM   #3
Member
 
Join Date: May 2014
Location: Pflugerville, Texas
Posts: 40
I posed the same inquiry to the dealer where I recently purchased my 2015 8289WS. He said they had no complaints about either the 15" aluminum wheels or C rated tires. He gave me the number for the tech support at FR who echoed the same thing. To paraphrase him, he said the aluminum wheels are rated to 65 psi and although some people upgrade to D or E rated tires, it is not necessary as FR makes sure the tires and wheels are well matched to the weight and specifications of the camper. He also said if I decided to upgrade to the E rated tire there is no concern with the PSI on the wheels. His caveat though is that FR will not warranty the new tires or any damage, should any occur. He said that warranty and liability will fall to the folks that sell and install the new tires.

Just passing on what the tech person said. I'll pass on the name and number of the tech rep if you want it.

Ken
__________________
TheBennetts is offline   Reply With Quote
Old 05-28-2014, 09:45 AM   #4
Senior Member
 
DaveSchwartz's Avatar
 
Join Date: May 2014
Location: Waterloo Region
Posts: 717
I agree that the stock LRC tire on the full-size 82xxWS leaves too little safety margin for the most critical piece of the GVWR chain. I'm a bit paranoid about tires and would rather the rubber not be the weakest link.

The place I get all my tires is right beside the dealer where my 8282WS should be arriving in less than two weeks. The second stop (after my driveway) after pickup will be to swap for a set of GY Marathon LRDs, balanced with a TST TPMS that I also have on order.

My previous TT was about ~5000 GVWR and had Nanco LRC tires. I had one of those fail on my second trip (about 300 miles on it). Put the spare on and ran those same four tires for 8 years and probably 15,000 miles (always at 50psi). Tread was getting a bit low and one was losing about 2 psi a week when the TT was written off by a deer strike. I consider myself very lucky - on the tires at least.

P.S. Even though LRD is rated at 65PSI max and LRE is rated 80PSI max, you would not be running these pressures. The required pressure is mostly a function of load and should technically be set according to maintain the proper deformation ('squash') of the tire to achieve the proper contact patch and ride. A tire needs some deformation but not too much but since its hard for a consumer to know how to measure that, manufacturers produce load/inflation charts. Goodyear has one on available for download but it should apply to pretty much all manufacturers. If you run those LRE tires at 80PSI on your 8286WS they are going to be rock hard, break all your dishes and shake all the screws loose.

IMHO you really only need to go up in load range if the actual maximum weight on the tire would require an inflation pressure over the maximum for the tire you have.
__________________
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam

Self restraint is for the young. I'm old and want it NOW!
DaveSchwartz is offline   Reply With Quote
Old 05-28-2014, 09:48 AM   #5
Junior Member
 
TopTiger's Avatar
 
Join Date: Jan 2014
Location: Granbury, Texas
Posts: 25
Thanks for input. Sales and tech reps said same to me, but experience taught me to upgrade any factory tires to at least a D load rating. Chances of blowout significantly reduced. Did this on last Dutchmen bumper pull after blowout incident and the next 5K road miles were pretty much worry free. Still always checked pressure before pulling out, but air loss slowed and towing stability improved.

Sent from my HTC One using Forest River Forums mobile app
__________________

IT'S GREAT TO BE ALIVE!
Bob & Marie
Rockwood 8286WS "Bunker"
Ford F-250XLT 2WD 6.4LD
TopTiger is offline   Reply With Quote
Old 05-28-2014, 09:56 AM   #6
Junior Member
 
TopTiger's Avatar
 
Join Date: Jan 2014
Location: Granbury, Texas
Posts: 25
Tire to trailer clearance checked. With E rated lost about 1" clearance side to side. About same above. Seems like plenty and still safe. That's why I am inclined to plus size to 16"wheels and go to E load. Wonder if towing will be better and maybe mpg improved. 16" wheel with E load is what I also have on my F250 6.4l. Anyone get better mpg with plus size wheels? Don't know what if any effect Tire size has on mpg.

Sent from my HTC One using Forest River Forums mobile app
__________________

IT'S GREAT TO BE ALIVE!
Bob & Marie
Rockwood 8286WS "Bunker"
Ford F-250XLT 2WD 6.4LD
TopTiger is offline   Reply With Quote
Old 05-28-2014, 10:14 AM   #7
Phat Phrog Stunt Team
 
AquaMan's Avatar
 
Join Date: Apr 2012
Location: Tipp City, OH
Posts: 6,477
Quote:
Originally Posted by TopTiger View Post
Tire to trailer clearance checked. With E rated lost about 1" clearance side to side. About same above. Seems like plenty and still safe. That's why I am inclined to plus size to 16"wheels and go to E load. Wonder if towing will be better and maybe mpg improved. 16" wheel with E load is what I also have on my F250 6.4l. Anyone get better mpg with plus size wheels? Don't know what if any effect Tire size has on mpg.

Sent from my HTC One using Forest River Forums mobile app
On a previous TT, I upgraded from a 14" to a 15" wheel/tire combo. Went from C to E rated tire and the handling/mpg both improved. Rolled much better on the highway and gained a solid 1-1.5 mpg avg.
__________________
2016 Georgetown 364TS
Nights Camped 2017 - 49
AquaMan is offline   Reply With Quote
Old 05-28-2014, 10:17 AM   #8
Senior Member
 
DaveSchwartz's Avatar
 
Join Date: May 2014
Location: Waterloo Region
Posts: 717
The reason you have LRE on your F250 (SRW?) is that your RAWR is probably in the 6,000 range. That means you could easily dump enough stuff in the bed that would exceed the ~2500 lbs that LRD at max pressure could carry. The same is not true of your 8286.
__________________
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam

Self restraint is for the young. I'm old and want it NOW!
DaveSchwartz is offline   Reply With Quote
Old 05-28-2014, 10:25 AM   #9
Senior Member
 
DaveSchwartz's Avatar
 
Join Date: May 2014
Location: Waterloo Region
Posts: 717
Quote:
Originally Posted by AquaMan View Post
On a previous TT, I upgraded from a 14" to a 15" wheel/tire combo. Went from C to E rated tire and the handling/mpg both improved. Rolled much better on the highway and gained a solid 1-1.5 mpg avg.
Not saying you can't use LRE for the safety margin, just that if you inflate to max pressure even though you are far from max load your trailer will not enjoy it.
__________________
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam

Self restraint is for the young. I'm old and want it NOW!
DaveSchwartz is offline   Reply With Quote
Old 05-28-2014, 10:36 AM   #10
Camper Less Camping
 
Cajun Po-Boy's Avatar
 
Join Date: Apr 2012
Location: NW
Posts: 3,642
Toptiger...definetly will see improved mpg, especially if you maintain the cold max psi posted on tire sidewall.
Less rolling resistance and heat build up if you maintain max psi rather than a lower psi...camper will understand! ,)

Also, during those moments when you have to maneuver the camper in an awkward side way motion, tires will be much more willing to do what you want when at max psi.
__________________

__________________
2013 Sabre 32RCTS-6 (sold)
Family of 4 whose always on the GEAUX!
Cajun Po-Boy is offline   Reply With Quote
Reply

Tags
tire, tires

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 10:58 PM.