Update on lead times for those interested. I paid on June 17th and was told 25-35 days for size 52 frame in raw carbon glossy + 400x100 bars + C53DB wheels. 

Update yesterday (35 days post order) was that frame is 10 days away, fork 15 days and handlebar 30 days. Based on other's experiences in this thread I was expecting closer to 60 days in total so not exactly a surprise, but bizarre that their estimates are so consistently wrong.

Why should it be unsafe? You lose some minor, minor aero gains but that’s it. The bigger the the tire to rim ratio, the mushroomier it looks. Safety wise you could go much narrower.