You can find in depth product info here: http://www.babolat-purestrike.com/enWhat has changed on the new 18 x 20 strikes compared to the old ones? Is there any specs around for the new 18 x 20 models yet?
Has Thiem switched yet? In pictures from earlier in the year the x-sider technology was still visible on his frames.You can find in depth product info here: http://www.babolat-purestrike.com/en
In short, we made the beam wider at 3,9, 12 o'clock and in the throat to give the racket improved stability. The string pattern has been updated with FSI Power, meaning the crosses are now wider for improved power. X - sider technology has been removed from the racket.
The 18x20 is (unstrung) 305 grams, 320 mm balance, and 98 sq in.