Those look pretty generic. I'd unscrew a leg, measure the diameter of the hole, and look online for appropriate casters. Or, leave the range on the leg dollies. That's how my range is.

Good casters are expensive, but not that expensive. McMaster Carr sells a suitable looking caster for about $20/each. link to caster

was just thinking....with casters....I guess you cannot level them like the ones that come on the range that allow you to lower raise each one independently? They look like all they do is get inserted into the hole and than secured with the nut.

Just curious why, and how often you would need to move your range?

I've had my Bluestar three years now, and haven't had reason to move it yet.

But if so, they do make thin plastic runners to slide appliances on.

For some reason it gets really dirty behind my range. Plus we have a golden retriever whose fur gets whisped under there. It seems like everything winds up under there. Was figuring put some casters so I could roll it in and out with ease and routinely sweep under there. With the dollies I have now, it works so well, but they give the range too much height and it winds up being positioned too high above the counter. The current leg is about 2 1/2 inches in height. I took a leg off last night. Found out the nut is welded to the top of the frame and the caster screws into the fixed nut. So a caster should be able to be adjusted for height by screwing/unscrewing to height in the nut. A knock off caster will be hard to find, this is definitely custom made to get the correct height along with the large bolt on the caster. Most casters are too high and the bolt is too thin.

I've been doing my homework before purchasing a BS and in my research I came across this info that you may find interesting. I'm pretty sure that most homes do not have the flooring recommended and I don't know what an equivalent would be.

What do you do with the gas line? I wouldn't think continually flexing it moving it that much would be a good idea...

With the casters, be careful about scarring your flooring. Any dirt or grit along with the weight will permanently mark your floor.

My floor is porcelain tiles....would assume that is adequate. In regards the the gas line, would not think that would be problematic, I created a 1 foot x 1 foot recess in the wall to accommodate the gas hook up. My gas line terminates in the recessesed area allowing enough room for the gas line to coil up nicely. Will give the slides a try,

IIRC, gas lines are metallic (though covered in plastic perhaps). Constant flexing by moving back and forth for cleaning is a recipe for fatigue failure.

I have a commercial gas line. It isn't like the cheapo ones at HD. Must be 1 1/2" in diameter. You can pull out the range.

I have had on occasion to pull out my old Garland (that came with casters).

For the life of me - people spend $$$ on a kitchen, and waste their time, trying to find a cheaper caster. I just don't get it.

I get it, when you are done paying for the kitchen, you really want to be done paying for the kitchen. I think the commenters above are correct on the gas line being a potential problem...

Just Google 'commercial flexible gas line"

Commercial gas line

Our BS has a flex line on it, our range can be moved in and out without damage to the line...damage to your back is a different story! We have cats and I understand the fur issue (and little toy mice). I would just use a vacuum attachment to slide under there. It would seem to do the trick without having to move the range.

I use this attachment for my Shark (lift away) vacuum cleaner:

http://www.sharkclean.com/parts/0/all/323/under-appliance-wand/

Infomercial:

https://www.youtube.com/watch?v=u30c1BXAbvc

No need to pull out range.