Wow, I never thought about that before, but I guess that's why the tires on horse-racing sulkies are very skinny -- and on racing bicycles.
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As far as wind drag, has anybody ever come up with a way to make the rig more aerodynamic for trailering?
Some road bikes use tires that are only 18 cm across. Really skinny but they still have to carry the same weight of the rider and bike so they may bulge out more where the tire contacts the road.
Removing the tramp might reduce drag.
