(quoted from post at 10:28:43 10/04/14) Not sure if you're being condescending or not, but I'll answer the question anyway. This is just one of those little peeves of mine, and I apologize for pointing it out. I used to sell automotive wheels and tires, so I suppose that's where it comes from. In the first picture of my MM, the whole yellow thing inside the tire is a wheel. The silver part in the second picture is a rim. A coffee cup has a rim, but we call it a coffee cup, A wheel has a rim, where you would attach a weight when balancing, but the whole thing is a wheel. A balancer in an automotive shop is not called a rim balancer, it's a wheel balancer. There are numerous companies, for example, that manufacture racing wheels. American Racing Wheels, Weld Wheel, Motor Wheel, and none of them use "rim" in their name. I think I know how this terminology started, but it wouldn't be politically correct to voice my opinion. Again, sorry for being picky- it's just one of those things that bugs me.