On my 200i Like I swapped put the front City Grip for another at about 14,000 miles. Still with tread but wasn't expensive and an rasy removal.
The rear was more worn and was removed around 12,000, nut still with tread.
You and I are polar opposites in riding style....plus it's a lot cooler at night😊, easier on the compound.
Still trying out the Angels. ...but will recommend the C Grips without reservation!
Stig