The rims are 19.5's and I purchased them from southwestwheel.com the kit is SWWC2A. The truck has a 14 bolt rear axle which made installation easier and I drilled out the front the front hubs for larger studs. The kit comes with 4 aluminum and 2 steel rims with center caps. The only problem I had was the steel rims in the kit were closer to the rear springs than I liked but I had some other rims that solved that problem. I also changed the center caps to GM center caps so that meant installing metric studs which is no problem because the metric and standard studs are the same size where they press into the hubs.