Wheel shopping and a couple questions

Big thanks to you guys for answering my fng questions this past weekend, I appreciate it.

Not a fan of the factory wheels so I’m trying to wear out my factory tires as soon as possible so I can get new wheels…😜

I want a lightweight, subdued racing style wheel. Was hoping to keep it at 21”, but it seems most of the few compatible options I’ve found online are 20”…. So 3 part question:

Any recommendations for a lightweight racing style wheel, black or dark grey? (my body color is the dark electro whatever grey)

What is the weight of the factory wheel? I would like to find a wheel lighter than stock for better performance.

When I put bigger wheels/tires on my truck, I remember the speedometer was off after that. I’m hoping if I go 20” there might be a way to recalibrate the speedometer?