I kind of like these Pololu wheels - they come various sizes and colors and I see them on a collection of robot part websites, so they seem to be popular. But it's so hard to get a feel for parts without being able to touch them. Maybe someone can comment on the following -
I'm planning to put a pair of wheels on a 3mm single axle driven at up to 4500 rpm. I don't really expect it to get to that speed, but it will probably exceed 1000 rpm. If I use the 3mm axle with a flat, will they remain square and secure at high speed?
If I go with the seperate aluminum hub to ensure squareness to the axle, can I get the hub well centered on the wheel, or is there a lot of slop in the mounting holes?
What is the weight of the various sizes of wheel - preferable broken out between wheel and tire.
I'm currently using some 'Lego Technics' wheels of about 3.5" diameter, but they are heavy and crude - they frequently start to vibrate so violently that they come off of the shaft or lose a tire. I'm hoping to make a significant improvement in this area.