I have a portable dishwasher that uses wheels similar to those found on
a lot of office chairs. I noticed with my old vinyl flooring that the
wheels caused marks (more like ruts or indentations). They're not
really gouges, but definitely wheel marks that were very discernable in
particular lighting conditions.

Here is a link for a picture of similar wheels currently on the portable
dishwasher:

http://tinyurl.com/2cmnkc

which is the same link as,

http://www.staples.com/webapp/wcs/st...C2:CG32:DP1532

Since I have to get new kitchen flooring (high-grade sheet vinyl) and I
want to prevent wheel marks in the future, does anyone know of any
wheels, rollers, or casters I can buy that will be more 'floor friendly'
that won't mark the floor as I've described? I've already been by
Lowes, and they didn't have anything suitable. TIA.

Sky

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Ultra Ultimate Kitchen Rule - Use the Timer!
Ultimate Kitchen Rule -- Cook's Choice