Dean McDermott — known to take on anything from scuba diving to racing motorcycles on his and wife Tori Spelling’s Oxygen reality show Home Sweet Hollywood — is not one to turn down a challenge. But this time, his new goal might be a surprise.

“I’d love to be on Dancing with the Stars,” says McDermott, who is the Grand Marshall of the Los Angeles Ride for Autism this Saturday. “It looks like the scariest thing in the world.”

Why DWTS? “I’m a huge fan of the show and it looks like a lot of hard work,” says McDermott, who has been rumored to be a possible contestant on the show. “I tend to gravitate towards anything that’s a challenge.”

As for his dancing skills, McDermott admits to PEOPLE that he might be in for an uphill battle. “I have no dancing skills whatsoever except for the improv stripper moves which Tori thinks I’m pretty good at,” he says with a laugh. “I’m 6′ 3” with size 14 feet, so I’m like a giraffe. My dance partner would be stepped on constantly.”

Luckily, he already has one fan. “I’d be so psyched if he was on the show!” says Spelling. “I’d be in the front row every week. I think he’d be amazing.”

This weekend, Spelling will accompany her husband as he hits the road on a Suzuki Boulevard M109 cruiser bike at the Ride for Autism. “I’m thrilled,” says McDermott about being chosen as the Grand Marshall for this year’s event, which will feature a record-breaking 600 riders. “I was inspired by Jenny McCarthy, whom I did a movie with. After reading her book about her struggle when her son was diagnosed with autism, I felt I wanted to be involved and raise awareness.”

The couple has donated a custom Spyder women’s bike with their autographs to help raise this year’s goal of $200,000.

Source, Bauer-Griffin