Marlboro Ducati Nicky Hayden was forced to change his front Bridgestone during Sunday's Indianapolis MotoGP race as the tyre had worn down so much it was shaking along the straight and felt like it was on the carcass.

Hayden selected the softer option for the race after trying to qualifying on the harder tyre but it had outlived its usefulness halfway through lap five, leaving the Kentuckian no option but to put in and roll round for two points - a situation he calls 'emabarrassing' in front of his home crowd.

"In qualifying, the hard front was even worse. With my first qualifier I used a hard front and I literally only got four laps out of it. I used the soft and it pushed a lot less and it lasted longer. We put the same soft front in for warm up and it worked pretty good. I'm not sure it was going to make a big difference. We have no front grip anyway, we push the front everywhere," said Hayden, speaking to bikesportnews.com.

"Loris and Abraham were going a lot slower and their front tyre didn't last. Obviously we made a mistake but we tried to do something. It wasn't the right thing but we were just destroying front tyres when you don't have front grip.

"We changed the bike quite a lot for the race and in the first couple of laps it felt like in the dry I was the first time I could haver put up any kind of fight. This new gearbox was really helping me out of the last corner as I was able to stay in guys' draught. I knew Casey and Dani were quicker Lorenzo wasn't much quicker than me.

"I had to get by Dovizioso because he was holding me up in a few places. That's the first time I have thought I had to get by a factory Honda. About lap five I felt it in turn five but I thought I'd keep pushing because sometimes this weekend we would get to graining and then it would come a little better but the real rubber was gone, it was on the carcass. It was shaking on the front straightaway it was so out of balance, I just pitted. "I went back out to get two points. It was almost embarrassing."