Eleven years ago, her son Brian, then 26, was thrown from his motorcycle, an off-road bike.

Many on-road bikes are much faster than off-road bikes and can be used in sports such as motorbike racing.

Today, these multi-purpose off-road bikes account for over 75% of the cycling market's unit sales.

Because off-road bikes usually don't come standard with lights, mirrors, a horn or a muffler, they aren't street-legal.

Repack served as a testing ground for off-road bikes.

Nearly the same number occur with road bikes, which outnumber off-road bikes by three to one.

It's families who get interested because their children are into off-road bikes.

They are offering new sport bikes to win back enthusiasts, and small off-road bikes that offer an unintimidating introduction to biking.

Finally, owners add street-legal equipment to off-road bikes.

Cyclone takes the form of an off-road bike and can be ridden by people other than Hongo.