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Old 11-28-2011, 06:31 PM   #11
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Since experiencing sway issues with a 30' tt towed by a 128" wheelbase tv, I have tried to follow the chart that mtnguy has provided. My current TV has 163" wheel base and I have not had any issues towing my 34' 11" tt. So I'm a little over according to the chart.

This guide may or may not be fact based, but it has been around for quite a few years and as far as I know no one has come up with anything better. JMHO, but I would rather err on the side of safety.

As far as manufacturers not providing any info in their towing guides about wheelbase to trailer length, that might be hard to do. There's a big difference in towing a 35' flatbed trailer compared to a 35' RV.

I also want to point out that I refer to the chart as a guide, not an absoulte rule. I'm not trying to tell others what to do, just trying to explain why I think the guide is good to use until something better comes along.
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Old 11-28-2011, 08:20 PM   #12
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Eckrote - WELCOME to the forum. FWIW I tow a 35' trailer with a wheelbase of 153.7" and have not had any problems. see sig. for truck info.
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Old 11-28-2011, 09:00 PM   #13
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i did some searching and this was all i could find on the subject. its from another rv forum. if anyone has any more solid info please post.

The question:
“Looking at upgrading from a 26' travel trailer to a 33' travel trailer.
My tow vehicle is a 2008 F350 Crew Cab Short box with a wheel base of 153 inches.
Doing the calculation of:
110 inches wheel base for 20 feet of trailer plus 4" wheel base for every extra foot.....
That is 13' extra trailer lenght requiring an extra 52 inches of tow vehicle wheelbase.
Therefore that equates to (110 + 52) 162 inches of wheel base required.
Theoretically I am 10 inches short on wheel base.
Will there be tow/sway issues with this setup or am I panicking for nothing?
Anyone else towing this type of setup??
There is no way I am going to change tow vehicles now, my wife will start removing body parts if I even suggest our tow vehicle is not adequate!!!!!”

And the responses:
“You might take note that all of the manufacturers use wheel base as ONE of the many items they consider in setting tow ratings and PRACTICALLY none of them take ANY note of the trailers length. Of course longer wheel bases make for better stability but how many slingshot dragsters to you see on the road towing a trailer? It's just a very small item among many that go into making up a good tow vehicle. Almost NOBODY tows with the absolute BEST tow vehicle for their trailer (and that includes the one ton and larger ones) but MOST use one that is ADEQUATE and STABLE, as is yours.”
“That calculation is a hang around from back in the day when dad would tow a travel trailer right on the ball of the old wood panel Ford station wagon. With everyone these days (for the most part) towing with modern weight dist. hitches and sway control systems, it's not as relevant IMHO.
That said, you've got ample truck for a 33' TT, you may need to look at some quality hitch hardware to get it perfect, but toss that formula out the window.”

“I'd like to see a credible source for 'ye olde' wheelbase forumla for trailer towing. I've heard about ti plenty, never seen anything from a credible source saying it's derived from any science or testing”.
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Old 11-28-2011, 09:42 PM   #14
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Eckrote,

I tow a 34' Rockwood with a 130" wheelbase 2007 Chevy Avalanche (slightly longer than a standard Denali but equal to the XL/Suburban). I was not 100% confident in this setup after a few trips in high winds (had more sway than I cared for) so I found a used Hensley Arrow hitch setup on hitchtrader.com for $900 and am now 100% confident in my setup. I pulled from northwest Ohio to Wyoming (Yellowstone and the Tetons) this past summer in some severe weather and wind (the wind is "crazy" driving across the plains out west) with no trouble at all (using the Hensley) If you have any questions about sway I would suggest getting a Hensley or Propride hitch. If you can find a used hitch it is a small price to pay for a little extra insurance on your appx. $20K-$25K camper and $35K-$45K tow vehicle.
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Old 11-28-2011, 09:44 PM   #15
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Quote:
Originally Posted by youroo View Post
When you guys find the (Wheel base chart) please let the company's with the (short,single axle,semi,s) pulling those 12' wide,60+ foot long,MFG homes down the road at 65+ MPH that they are too short! Youroo!!

X2 on the triples running up and down the 'pike. Those rigs are outta control at best!!
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Old 11-28-2011, 09:49 PM   #16
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We have recently purchased a Lacrosse 296 BHS and our tow vehicle is a Nissan Armada with tow package. I was concerned about how it would handle the TT. After a couple of adjustments on the Equalizer WD/sway control hitch it pulls like a dream. I had pulled the TT prior to purchace and it was pretty wild. Now I only know its there due to stopping at so many gas stations.
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Old 11-28-2011, 09:55 PM   #17
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I think no matter how long or short your TV is you can run into problems. Here in Calgary yesterday we had a Chinook blow in that was packing winds of 150km/h or 93mph. The smart thing here is to get off the road and wait it out, there were several truckers that weren't so lucky and were simply blown over.

This might shed some light on what the wind can do.

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Old 11-28-2011, 10:45 PM   #18
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For what its worth we had an EL Ford Expedition when we bought our 32' Salem. All of the numbers worked except we had too light of an equalizer hitch and equalizer bars......All sold by the dealer.

After our first 3 week trip...about 3000 miles we decided the TV was just too borderline to do the job.

We went way overboard and got an F350 Dually Crew cab...thinking if we ever decided to upgrade to a 5th wheel, we will be ready for anything.

Now the truck just hummmmms along. Just did a 32 day 4750 mile trip thru Okla, Arkansas, Tenn, N. Carolina, S. Carolina, Georgia, Florida, Alabama, Missiissippi, Louisiana, Arkansasa again and back to Oklahoma with absolutly ZERO towing issues.

Just take your time and enjoy that new rig.
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Old 11-28-2011, 10:53 PM   #19
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Quote:
Originally Posted by Coops1 View Post
I think no matter how long or short your TV is you can run into problems. Here in Calgary yesterday we had a Chinook blow in that was packing winds of 150km/h or 93mph. The smart thing here is to get off the road and wait it out, there were several truckers that weren't so lucky and were simply blown over.

This might shed some light on what the wind can do.

Wow...that's a crazy video. Truck was a dully pulling what looks like a 34' TT.
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Old 11-29-2011, 08:24 AM   #20
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As indicated with the video, even a heavy duty long wheelbased vehicle will not prevent the wind from blowing a trailer over.

But IMHO, that swaying trailer could have jack-knifed much earlier with a lesser tow vehicle, and maybe even turning it over. Even with that heavy tow vehicle in the video, it turned it around 180°.....but it stayed sunny side up. If you notice near the end of the video, the hitch is completely disconnected, with only the safety chains being the connection between the trailer and truck.
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