Two-time Tour de France winner Chris Froome has signed a new contract extension with Team Sky.

The 30-year-old, who became the first Briton to win the elite race twice in 2013 and 2015, has penned terms that will take him through to 2018.

"Team Sky have been fundamental to my success to date, so it was a very easy decision to commit to the team until the end of 2018," said Froome. "Their values are my values and I am proud to ride for a team that has shown that you can win the biggest bike races in the world clean.

"2015 was a fantastic year for me both professional and personally and this is a great kick start to 2016. I am more motivated than I have ever been and I have got big targets for this Olympic year. I can't wait to start racing."

Team principal Sir Dave Brailsford added: "Chris is not only one of the most talented and dedicated riders in the world, he is also a fantastic ambassador for the sport. Team Sky is proud to have him as our team leader. He is a winner and it is a great boost at the start of the new season that he has committed to stay with the team to the end of 2018. He is hungry for more success and we will help him achieve it."

Froome will try to become the first man in 20 years to win the Tour de France back-to-back.