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Old 01-04-2015, 06:03 AM   #1
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Hyperlite 29HFS

I am just ordering our 29HFS, and it is rather loaded with Extreme Weather package, generator, etc. I read in other threads that they went to 4400# axles from 5200# recently. If you do the math that is not a lot of margin. I asked my sales rep about upgrading to 5200# axles and was told "Don't worry about it, you don't need it."

I'm an engineer...that is not a good answer!

Does anyone know if the factory will do upgrades such as that? That is an option I would gladly pay for upfront.

Thanks!
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Old 01-05-2015, 09:58 AM   #2
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I'm not an engineer (couldnt spell it now i are one!), the lighter axles reduce GVWR by appx 1300# down to 2700# of stuff. Is the garage still rated at 2000#, I can't see how. Plus yours has the generator and the extreme package that mine didn't. I wouldn't have a 29HFS without the 5200# axles... axles hit the frame on mine with one 750# bike and not heavy load... no water, etc. before the safety recall and the heavier axles were installed. It didn't cost me anything BTW. My gut tells me if the dealer checks; yours will come with the 5200# units... Get everything in writing... Whatever they tell you or promise you.
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Old 01-05-2015, 10:31 AM   #3
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Thanks for the response and great info!
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Old 01-06-2015, 12:44 PM   #4
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Call forest river I believe the new axles are 4700 the build with 4200 is over? The dealer is an idiot that couldn't calculate GVW. Mine were upgraded to 5200 because the brochure at the time had the GVW too high to work with 4200 axles. I believe that the brochure for 2015 has changed. My 2014 would have had a problem achieving 2000 in garage without the change. I believe my GVW was listed at 11500?
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Old 01-14-2015, 07:15 PM   #5
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How did you get axles changed. thru dealer or call warranty first. My paperwork says 4400 axles and I'm sure that not enough if I put 2k in garage
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Old 01-15-2015, 07:37 AM   #6
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Lonb, Dealer first. They should be the ones to contact FR warranty. But, in my case, I had to get involved and push. By my estimation, the lighter axles will allow a little over 2700# of cargo equally distributed, not with 75% in the garage. For every 2 to 3 pounds in the garage (I figure 2.5) it takes 1 pound off the tongue. My issue was the axles bottomed out against the frame with maybe 2000# total of cargo, including 900# in the garage.
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Old 01-16-2015, 07:53 AM   #7
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Wolfwhistle. My dry weight says 7240 another almost 500 in water and I still need to put clothes and toys in it. I'm going to load it in the spring weight it at a truckstop. But I'm betting I'm over 10000 I was thinking 5500 lb axles is what should be under there
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Old 01-16-2015, 10:59 AM   #8
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Wolfwhistle. My dry weight says 7240 another almost 500 in water and I still need to put clothes and toys in it. I'm going to load it in the spring weight it at a truckstop. But I'm betting I'm over 10000 I was thinking 5500 lb axles is what should be under there
Good morning Lonb, You should add a signature so we can see what you have. I can only assume its a 29HFS and by the weight I can assume you have the Extreme Pk and the generator. What does your sticker say is the GVWR? What is your rated cargo capacity?

Many forget that besides the trailer's axles, it is important that 10% to 15% be carried by the truck as tongue weight; that said, your 4400# axles can, in theory do the job, but I am also sure two 5200# axles would be enough; any higher is unnecessary and might not be compatible. I will explain. No matter the capacity of the axles, you can not exceed the GVWR. My sticker says 10,985#. I would think your's is less??

Lets add it up using the weights you mentioned: with garage at max (2000#), plus 500# in water, plus 500# in other stuff (clothes, food, pots and pans) you will be around 10,400#. Keep in mind you cannot exceed the GVWR. Water in the tank offsets some of the toy weight which is a good thing for maintaining a higher percentage of tongue weight and maybe half of that is on the tongue. 52 gallons of fresh weighs about 448#, BTW. I will assume you don't haul black or grey water around for any distance.

Based on that total of 10,740# the minimum of 1040# should be on the tongue, which leaves 9700# on the axles or 4850# each (exceeding their 4400# rating, but well under 5200#). If you could somehow load it so you have 1500# of tongue weight that would leave 8740# will be on the axles or 4370# each, slightly under the ratings of your axles.

We cannot know without weighing what each axle is really carrying and it would be better to know for sure how much each wheel is carrying. Not saying it is an issue without weighing, but each wheel on the trailer will be carrying a different weight.

Frankly, I would feel better with E-rated tires and wheels. But by the math, it isn't necessary.

Also, the axle, tire, wheel ratings take into account reasonable driving hazards, such as bumps, dips and dives.
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Old 02-09-2015, 10:50 PM   #9
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I get two different specs on the 2015 29hfs . the dealers site specs shoe tw at 974 dry weight at 6968 and cargo at 2700 . the forest river site show 1032 tw dry weight at 6759 and cargo at 3014 . big difference between the two . which should i believe forest river or the dealer ? i'll be towing mine with a 03 chevy 2500hd 4x4 6.0 gas for now . and leaning toward the andersen hitch
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Old 02-10-2015, 03:09 PM   #10
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I get two different specs on the 2015 29hfs . the dealers site specs shoe tw at 974 dry weight at 6968 and cargo at 2700 . the forest river site show 1032 tw dry weight at 6759 and cargo at 3014 . big difference between the two . which should i believe forest river or the dealer ? i'll be towing mine with a 03 chevy 2500hd 4x4 6.0 gas for now . and leaning toward the andersen hitch
My WAG is the difference (dealer to factory) is specific options. Adding up the factory numbers shows me the GVWR should be 10,805 lbs. I would guess that nothing is going to change that; anything that is added, options or whatever, reduce the cargo weight and change the tongue weight depending on the balance. According to the dealers numbers you gave, the GVWR would be 10,642 lbs, a difference of only 163 lbs. Can't see this is much of an issue. Keep in mind the unit is actually weighed before leaving the factory and this will be the "gospel" so to speak. The 2014 brochure (early version) showed 974# TW, 6968# dry and 4017# cargo, while late 2014 showed 974#, 6968# and 2700# now that is a big difference! Enough that I complained and FR paid for the upgrade. BTW, I like my Drawtite dual-cam, now that I know how to set it up, but it was a PITA.
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