Used the search option above and found:
Weights for stock wheels and tires.
Bridgestone RE050A RFT tires are standard on the 135i.
The 215/40/18 front tire weighs 23.8lbs.
The 245/35/18 rear weighs 26.0lbs.
Per member TP 135i the weights on the 264's are below.
Front wheels are 11kg (24.2 lbs)
Rear and 11.92kg (26.2 lbs)
http://www.1addicts.com/forums/showthread.php?t=4632
Stock wheels and tires together:
48.0lbs each on the front
52.2lbs each on the rear.