The action sports community is coming together this week in support of Caleb Moore, who remains in critical condition nearly one week after crashing in the Snowmobile Freestyle finals at X Games Aspen 2013.

Moore was flown to St. Mary's Hospital in Grand Junction, Colo., with a head injury and a heart contusion after the crash.

"As many of you know, Caleb Moore was seriously injured at X Games last week," X Games gold medalist Travis Pastrana wrote on Wednesday in a Facebook post linking to a donation site that received more than $16,000 in its first few hours online toward a goal of $300,000.

"Caleb rides because he loves it. He doesn't compete for money or fame; he competes and rides because of passion. Please help and donate to support him and his family during this very difficult time."

Australian rider Jackson "Jacko" Strong, Moore's Rockstar Energy teammate, put the sled he rode in the competition up for auction on eBay on Wednesday with a starting bid of $7,500 and will be donating all of the proceeds to Moore and his family to help out with hospital costs and other expenses.

"We're just hoping that he keeps improving every day, and everybody's pulling together for him. All in all, the action sports community is a pretty small and tight-knit group," Strong, an X Games Moto X Freestyle gold medalist, who made his Snowmobile Freestyle debut this year with help from Caleb Moore and his brother Colten Moore, told ESPN.com.

"Everyone knows what could happen before they start riding, and unfortunately this time someone got hurt badly. All we can do is send a good thought his way, try to support him and his family any way we can, and hope he gets up on his feet and gets out on his sled again."

Bidding for Strong's 2012 Polaris IQ 600R sled with custom Metal Mulisha graphics had reached $8,700 within hours of going online. The auction ends Feb. 8.

"The Moore brothers are really cool guys," Strong said.

He first met the duo while performing together in Australia on the Crusty Demons tour, and later toured with them doing freestyle shows in Mexico and South America.

"I've known them for a while, and when I said I wanted to get into this snowmobile thing they really got behind me and helped me out, so now I'm just doing my part to return the favor any way I can," Strong said.

Caleb Moore remains in critical condition, according to the most recent statement from the family, which noted, "The Moores want to express their gratitude to all of Caleb's fans, friends and family for their strong support and ask for continued prayers in the coming days."