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03-15-2013, 10:09 AM
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#1
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Junior Member
Join Date: Oct 2011
Location: Oregon
Posts: 2
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ST or LT tires on 2005 Montana 2980RL
Hello, I am going to need to put tires on the 2005 Montana 2980RL 5th wheel. We purchased it as a used 5th wheel in 2010. So the tires have been on there since we purchased it. It has on it right now LT 235/85R16E including the spare (looks to be original-sticker still on tread). One of the tires had to replaced due to a leaking problem (bubble in tread area). I wrote to Keystone for advice, they just mentioned the tire size but not whether to install ST or LT tires. Which type do you recommend. We had a little tow trailer and it had ST tires on it. I would think that ST would be a better choice because of the "stiffer" sidewall. I want to call ahead to the tire store to insure they will have the type of tires before we have them replaced.
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03-15-2013, 05:32 PM
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#2
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Senior Member
Join Date: Mar 2011
Location: Colorado Mountains
Posts: 422
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If it was my TT, and it came with LT's, I'd replace them with LT's.
Again if it was mine they would be non-Chinese tires, with a DOT code no older than 6 months, and balanced with metal valve stems.
__________________
Chuck
Wonderful Wife
Australian Shepherd
2010 Ford Expedition TV
2010 Outback 230RS Toybox, 5390# UVW, 6800# Loaded
Not yet camped in Hawaii, 2 Canada Provinces, & 2 Territories
I can't be lost because I don't care where this lovely road is going
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03-15-2013, 05:50 PM
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#3
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Junior Member
Join Date: Oct 2011
Location: Oregon
Posts: 2
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ST or LT tires on 2005 Montana 2980RL
It came with the LT's when bought it used, so I have no idea if it came with the ST's or LT's originally. Like I mentioned, Keystone was vague on its recommendation. It looks like I will need to talk to a tire place or RV repair facility like Camping World to get the proper information. Thanks for your input much appreciated.
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03-15-2013, 06:20 PM
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#4
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Senior Member
Join Date: Nov 2011
Location: SoCal
Posts: 1,739
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I wish I had pictures of mine to double-check, but the sticker at the front corner of my trailer has my tire info. I thought it even listed the standard tires and their recommended pressures.
__________________
-Scott, DW, DG, DB, and DD
2011 Passport 2590BH
2009 Ford F150 SuperCrew F X4 5.4L w/Max Tow
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03-15-2013, 08:21 PM
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#5
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Senior Member
Join Date: Feb 2010
Location: Taylors, SC
Posts: 3,031
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Look on the left forward exterior portion of the trailer for the certification label. It may also be found on the LH side of the hitch pin housing.
Keystone quit using LRE Light Truck tires on 6000# axles in model year 2006. So I’m pretty sure yours came equipped with LT235/85R16E tires. I also think most posters will advise you to stick with the LT tires.
CW
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04-14-2013, 11:42 AM
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#6
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Junior Member
Join Date: Mar 2013
Location: Vero Beach, Florida
Posts: 8
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LT tires on my '09
Just replaced the tires on my '09 347 THT, with BF Goodrich Commercial LT 235/85 R 16, E rated. The original Goodyear Marathons ST 235/80 R 16 were still on it- they looked good, but had manufacture dates in mid 2007. Didn't want to take a chance, leaving on a 1000 mile trip this week. I don't expect any problems out of the BF Goodrich's. I keep them inflated properly and keep my highway speeds under 65 mph.
__________________
2009 Keystone Montana Mountaineer 347 THT Toy Hauler. Tow Vehicle: 2012 Dodge Ram 3500 CCLB 4x4, SRW.
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05-05-2013, 06:28 AM
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#7
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Junior Member
Join Date: May 2013
Location: Santa Rosa, Ca
Posts: 12
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I would go lt. I recently switched from st to lt in the same load range and the lts are way stiffer. I read a lot online and found a comparison of the dot testing on another forum. St don't require as much testing and are intended for occasional non passenger use. If you intend to travel long distances, in hot weather, and near or above the st 65 mph speed limit I would get lt. St have 0 reserve capacity so the load capacity is higher. Lts typically have 20% reserve and are rated to a higher speed like 106 mph. I have heard some tire engineers say if you go for st you should get ones 15-20% overrated. Another thing is most st makers recommended life is 3-4 years while lt are 6-7 years. Don't get caught up in the marketing hype about special uv stuff in st...how many lt tires have you seen rot? Good luck.
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05-05-2013, 07:18 PM
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#8
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Senior Member
Join Date: Feb 2010
Location: Taylors, SC
Posts: 3,031
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Quote:
Originally Posted by elkhorn98
I would go lt. I recently switched from st to lt in the same load range and the lts are way stiffer. I read a lot online and found a comparison of the dot testing on another forum. St don't require as much testing and are intended for occasional non passenger use. If you intend to travel long distances, in hot weather, and near or above the st 65 mph speed limit I would get lt. St have 0 reserve capacity so the load capacity is higher. Lts typically have 20% reserve and are rated to a higher speed like 106 mph. I have heard some tire engineers say if you go for st you should get ones 15-20% overrated. Another thing is most st makers recommended life is 3-4 years while lt are 6-7 years. Don't get caught up in the marketing hype about special uv stuff in st...how many lt tires have you seen rot? Good luck.
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The only acceptable load capacity for any highway tire is molded right into its sidewall.
CW
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05-06-2013, 04:47 AM
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#9
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Junior Member
Join Date: May 2013
Location: Santa Rosa, Ca
Posts: 12
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Cw I totally agree. If you get lt tires sized correctly you should be fine...but a st tire running near its load capacity is a blow out waiting to happen. Imho.
__________________
Elkhorn98
2010 GMC Sierra 2500HD 4x4 Duramax/Allison w/45 gal Transfer Flow Tank
RBW X16 Slider, Yamaha EF 2400iS
2007 Springdale 245 5th Wheel - E-Z Flex HD Suspension Upgrade
with Firestone Transforce Ht Lt 2357515 C tires
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05-06-2013, 08:01 PM
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#10
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Member
Join Date: Aug 2012
Location: Western WA
Posts: 94
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Upgrade to a higher load rating. Put 17.5" rims and GY G114's on our Big Sky. Overkill....maybe. Safe......oh yea! First trip out was great.
Running on the high end of the load rating to me is a problem waiting to happen.
Good luck and be safe.
__________________
2012 Silverado 3500 Duramax 6.6L Diesel
2012 Big Sky 3625RE, 17.5" hi-spec wheels, GY G114 tires, TST 507 TPMS
Two Field Bred English Springer Spaniels
One Wife
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