US supercross champion Chad Reed has been ruled out of the rest of the series after suffering multiple injuries in a horrific crash.

One of Australia’s highest-paid sportsmen, Reed was badly hurt at last weekend’s Dallas round of the AMA Supercross while challenging for the race lead.

Initial scans have revealed Reed has torn his anterior cruciate ligament, broken his tibia and fibula, sustained two broken ribs and has a broken vertebra.

“This is bitterly disappointing, I felt like I had everything in my corner this time,” Reed said.

“I’ve never felt more comfortable, from the bike and team to my riding.”

The 29-year-old from Kurri Kurri in New South Wales is a multiple world and US supercross champion.