Originally Posted by 00buck
Can anyone explain why a bike rack on the back bumper is a "no-no," but a spare tire seems to be OK.
this warning is generally for ultralight trailers, not motorhomes or heavy 5th wheels.
the physics between a spare tire on the bumper and a bunch of bikes on the bumper are different.
the spare tire is mounted right up against the back wall of the trailer. its weight is inline with the bumper.
a bike rack full of bikes, is held out and away from the back wall of the trailer.
so, its weight is also out and away, so when the bouncing starts(since TT's don't have shocks), the bikes' weight pulls back and down, like a fulcrum.
this is like a pipe attached to the bumper and someone standing on the bumper, grabs the pipe and leans back and pulls on the pipe over and over.
eventually this constant action will stress the bumper and its welds, especially on ultralight trailers.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC