Bike Social supported rider Scott Redding left Austin, Texas as Moto2 championship leader with a four point advantage in the championship.
Starting from pole position for the first time in his 86-race World Championship career, Redding went straight into full attack mode to try and put clear air between him and the pursuing pack.
But rapidly deteriorating front and rear grip, which Redding had expressed concerns about in advance of the 19-lap clash, meant he was unable to sustain his blistering early pace.
Rather than take unnecessary risks to force his way back into the podium hunt, Redding rode the remainder of the race with precious World Championship points in mind after main rival Pol Espargaro's unfortunate early crash.
He said: "I'm obviously disappointed not to be on the podium after starting from pole position but I salvaged fifth position out of a difficult race and now I am leading the championship and that's a great feeling. Before the race I knew we'd struggle with the tyres going off and that's exactly what happened. I went out there to win but after six laps I knew it was impossible. I guessed that Espargaro and Nakagami were out so I just used my brain and didn't push too hard to risk a crash that would have been very costly. It was a decent fifth and now I am leading the championship I need to hold it together for the rest of the year after a great start to the season."
The race was won by Nicolas Terol. Esteve Rabat was second with Redding’s team mate Mika Kallio third. Fellow Brit Danny Kent, in only his second Moto2 race was 18th, with Brit Kyle Smith 21st.