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Old 02-19-2015, 10:22 AM   #1
Kannonball8 OP
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Bouncing trailer

I have a 9' l x 6' w all aluminum flatbed trailer I use for hauling bikes. It has a torsion bar axle on it and tows OK when loaded but bounces so much when empty that it drives me crazy. I can live with it for short distances but I'm thinking about buying a bike that's 500 miles away - no way I could stand the bouncing for a full day of driving. Only solution I can think of is to put about 400 lbs of sand bags in it and then throw them away when I pick up the bike, but this solution kind of sucks if I'm going to use the trailer for this type of thing often. Anybody got any other Ideas?
Thanks
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Old 02-19-2015, 10:30 AM   #2
Wyvern
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How are the bushings .. if bad it doesn't help.

Drop the tire inflation when un-loaded, it really helps.
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Old 02-19-2015, 11:17 AM   #3
trailer Rails
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Yup, sand bags or lower tire pressure.

Do you have a bunch of snow around there? Load it up!

That is pretty much the same reason that people who drive 3/4 ton and 1 ton trucks around to get groceries are stupid. The suspension is designed to preform with weight on it, not unloaded.
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Old 02-19-2015, 11:22 AM   #4
Ogre_fl
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Do you have a bunch of snow around there? Load it up!
Oh yea, that will be a pure joy for everyone behind you.
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Old 02-19-2015, 11:36 AM   #5
dwayne
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400 lbs is only 40 gallons of water so 8, 5 gallon pails...
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Old 02-19-2015, 11:43 AM   #6
trailer Rails
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Oh yea, that will be a pure joy for everyone behind you.
A tarp would keep that in check.
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Old 02-19-2015, 11:51 AM   #7
firstr8
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400 lbs is only 40 gallons of water so 8, 5 gallon pails...

Good idea, just make sure you secure them in front of the axle, not behind to minimize sway.
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Old 02-19-2015, 03:39 PM   #8
troidus
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Lowered tire inflation was going to be my suggestion, too, and it's cheap and easy to try. Just remember to pack a small compressor with you so you can air them back up once you load up the bike.
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Old 02-19-2015, 03:50 PM   #9
Kannonball8 OP
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Thanks for the suggestions, I can lower air pressure some and also carry some load. I like the water idea a lot better than my idea of bagged sand, whole lot easier to get rid of water than sand when I pick up the bike. I can bring along a portable air tank to air up after loading up.
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Old 02-19-2015, 07:26 PM   #10
broncobowsher
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Thus the reason I ditched my torsion axle and linked the trailer suspension with air bags. Ride height sensor keeps it riding level regardless of how empty or full it is. Sway bar is a little too stiff, someday I will consider putting a thinner one in it.
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Old 02-19-2015, 08:01 PM   #11
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Would you ride your bike with springs but NO shocks?

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Old 02-20-2015, 05:40 PM   #12
broncobowsher
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Torsion axles on an empty trailer bounce due to the tires, not the torsion springs. Shocks won't fix that issue. The axle acts solid mounted if not loaded.

But I did use shocks when I converted to air suspension.
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Old 02-20-2015, 05:54 PM   #13
Jnich77
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Simple, strap a few 80lb bags of concrete from Lowe's in front of the axle. Then, Pick up the bike and go return the bags ad the nearest Lowe's.

Or, drop the air pressure down to around 20 lbs.

Better yet, go to your local country bar the night before you leave and pick up a fat chick. Strap her big ass to the trailer and you are riding smooth... in a number of ways ;-)
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Old 02-20-2015, 08:59 PM   #14
Salsa
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Quote:
Originally Posted by broncobowsher View Post
Torsion axles on an empty trailer bounce due to the tires, not the torsion springs. Shocks won't fix that issue. The axle acts solid mounted if not loaded.

But I did use shocks when I converted to air suspension.
Are you telling me that torsion springs are preloaded against the stops?

I have never tried them, I am just asking.

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Old 02-20-2015, 11:48 PM   #15
Bayner
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I know mine bounces a lot less when I run about 20-25 PSI empty. Easiest solution I think.
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