Originally posted by JBB_Piano:
Are there "caster cups" available for these large, concert-version casters?
No. It would defeat the puropse of having large casters, which is to allow for efficient and safe moving of the instrument.
Originally posted by Piano World:
Why do most of the larger grands use brass wheels instead of rubber?
We often hear from people who want to move their piano around, usually just within one room.
Sometimes it's just to clean the floor, or it may be to make room for a party/function.
The problem is the brass wheels do a number on the floors. The usual solutions for commercial use (grand dollies) look out of place in the home.
Can the brass wheels be replaced with rubber, and will the rubber wheels have nice brass frames?
Large rubber wheels have a number of drawbacks. Besides being a visual distraction to a beautiful, expensive piano, they also interfere with the "grounding" of the piano on the stage or floor. The firm connection of the instrument to the stage, without an acoustic break such as a rubber wheel enhances the tone and projection of hte instrument. As well, large rubber wheels can give the player the sensation of a soft, flexible "suspension" underneath the instrument. A firm unyielding foundation such as provided by quality stage casters is much more desirable.
I could go on, but I don't want to be accused of shameless promotion, as I am the direct importer of these stage casters from Germany.
These casters are also available with a thin, vulcanized rubber coating to protect sensitive floors.
Jonathon, There is an issue with installing these casters on a NY Steinway: NY pianos, (as opposed to Hamburg pianos) have casters that really deserve to be called "wheelies". They are too small to roll properly on a stage. Proof for that is that they don't have (or need brakes). Virtually all German piano makes (incl. S&S) have sensible stage casters (with brakes) under their larger pianos. Converting a NY S&S to stage casters involves doing something with the legs, which either need to be shortened, because of the taller height of the stage casters, or replaced with Hamburg legs, which have the right length for the stage casters.