“It's was total chaos and many things happened at the same time,” said Pedrosa, who revealed there had been confusion on the grid even before his front wheel problem.
“It all began with the restart because the procedure was not at all clear. Nobody knew if it was one minute, three minutes, warmers on or off...
“We were also getting different information about the number of laps, 26, 27... Then suddenly we were told it was 1 minute to the start of the race, with no board signage, nothing.
“The mechanics were rushing to prepare and when they tried to take off the warmers my front wheel was somehow locked, they tried to unlocked it but they weren't able to and due to the 1 minute warning - where they are not allowed to touch the bike anymore - they put me to the back of the grid.
“I tried to remain focused, not make any mistake on the first lap, make clear moves to overtake riders and I was 8th or 9th by the sixth corner when Barberá hit me from behind, and that was it.
“I'm very upset because even it's easy to say now, I think I could have had a chance to win this race, even starting from the last place on the grid.
“Now the Championship is obviously more uphill for me, but I will continue the same way.
“We have done everything we could so far, the bike is working well and I'm riding well, too. So it's not over for me; there are still five races to go and we will do our best.”
Victory for Jorge Lorenzo means Pedrosa has dropped from 13 to 38 points behind the Yamaha rider.
Lorenzo has also suffered one DNF this year, after being taken out at Assen.