I think 255/50-17 is too big in the front. The rear should be fine.
I did a little testing yesterday. I switched my fronts and rears around to test for fit. I put the 255/60-15 on the front and 235/60-15 on the rear. Under full turn the front tires just start to rub the frame on the rear part of each tire. No other issues anywhere. Did a little 'tire warming' with the 235/60-15, which led to some fun and cleaning some rash off the rear quarters.
I am trying to figure out the back spacing/ offsetting of the wheels. The stock Rally II wheels have a 4.25" and the new YO Honeycomb wheels have a 5" back spacing. According to this, it means the inner rim edge is closer to the center of the car by 0.75", which means there should be clearance issues. Does anyone have a tire and wheels fitting chart or program see how this works out?
After doing some math, it appears the new Year One Honeycomb wheels will sit 0.375" further away from the car, if using the same physical size tire. Example: from 255/60-15 to 255/50-17. A sizes are the same, except for diameter which is 15" vs 17".