Mumbai: Superstars Shah Rukh Khan and Salman Khan are giving serious friendship goals to their fans across the world. The two actors have posed on bicycles together giving out a message of how to say no to pollution. Shah Rukh took to Twitter to share the photograph of their 'bhai' moment with his fans and followers. “Bhai bhai on bike bike. No pollution…bhai says 'Michael Lal Cylcle Lal',” SRK captioned it. In the photograph, Shah Rukh is seen wearing a white shirt, pants and a waistcoat, while Salman, who is awaiting release of “Sultan”, opted for casual wear. He is seen wearing a black shirt and jeans and also flaunts his new hairdo. The image not only shares a glimpse of the strong bond that the two Khans of Bollywood share, but also has a subtle message attached to it. It seems that the actors are trying to promote use of bicycles to curb pollution level. SRK and Salman's bond hit a rough patch at one point of time, but all seems well now. They have shared the frame in films like "Karan Arjun", "Hum Tumhare Hain Sanam" and "Kuch Kuch Hota Hai". The much-anticipated sports drama film “Sultan” will release on July 6 on the occasion of Eid. Produced by Aditya Chopra and written-directed by Ali Abbas Zafar, “Sultan” features Salman and Anushka Sharma as wrestlers.