4 bikes shouldn't weight more than 120-130 lbs and that is assuming
heavier entry level bicycles.

Moderately priced road bikes weigh less than 23-5 lbs, so 4 of those
might well come in under 100 lbs

The way some racks stick out works as a lever to increase the force on
the reciever somewhat, but this still is a relatively small amount of
weight, or so it seems to me.  And many racks would have one or more
nylon straps to connect to the upper lip of the hatch or trunk which
would support some of the bike weight.

look at performancebike.com and bikenashbar.com for lots of bike racks

Sam

--
Sam Walters
Baltimore, MD

89 Syncro GL, Zetec Inside
85 Westy Weekender
85 Mercedes Benz 300D Turbodiesel - to become veggie oil powered

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