An exercise bike is better than a rip stick because of its safety brakes but a rip stick is more fun.
A bike..but this is more of a personal oppinion question.
Exercise biking is better than rip sticking because it is comparatively safer due to presence of brakes, although rip sticking is more fun.
Exercise biking is better than rip sticking in terms of safety because it has brakes unlike a rip stick which has no brakes whereas in terms of fun, rip sticking is better because you can do sharp turns.
A rip stick is about 30.00 just a guess 
The colors of a rip stick are, red, blue, green, silver, blue and red, and hot pink.
We would like to get in touch with the person who invented the rip stick. We are doing a project. Our email is leonetg22@optonline.net
original rip stick
a rip off
A wheel from your skate board may work on a rip stick. It should be an outdoor wheel and needs to be 77mm or smaller.
Where to buy a rip stick in dubai
Wiseguy - 1987 The Rip-Off Stick 2-15 was released on: USA: 22 March 1989
10$it depends if its a rip stick g or a caster board rip stick the rip stick g cost $60 and the cater board cost $70 or $80