depends on if your wanting to know lites or not riders
450 top riders are
Ryan dungey
Chad Reed
James Stewart
ryan villopoto
Lites 250 class
Justin Barcia
Ryan Sipes
Dean Wilson
Blake Baggett
This varies wildly. For an Elite league team, there are 7 "places" for riders. Usually all 7 will attend a meeting, but in the event of an injury, Rider Replacement strategies (where one of the other 6 riders covers his heats) is in place, or another rider may "guest" in his spot. For other competitions this can change. Such as World Cup, there are 5 riders, Team Pairs there are 2 riders per team.
No one knows if there will be a Sonic Riders 4.
Tube Top - 2011 Whacky Edition 1-4 was released on: USA: 14 February 2011
It is unknown if there is going to be a Sonic Riders 4.
The Top Ten Show - 2011 Best in Fest 1-4 was released on: USA: 3 December 2011
Top Grad - 2011 If You Can't Stand the Heat--- 1-4 was released on: USA: 1 April 2011
Top Secret Recipe - 2011 Domino's Pizza 1-4 was released on: USA: 28 October 2011
It used to be Road racing and Flat tracking for two wheel racing, but motocross, and supercross have blown them out of the water. As for comparing 2 wheels to 4 wheels I think it would be Nascar 1st, motocross/supercross 2nd, Champ/Indi cars 3rd. All other racing, 2 or 4 wheels, its a toss-up after these top three. (I'm refering only to the U.S.A.)
Your top gear or last gear you shift to. Depending on what make and model of your bike, either 4th or 5th on motocross bikes and for woods bikes it would be 5th or 6th.
10 on Top - 2010 2011-06-04 was released on: USA: 4 June 2011
Life on Top - 2009 2011-03-04 was released on: USA: 4 March 2011
Tube Top - 2011 The Hundreds 1-15 was released on: USA: 4 May 2011