Thanks for all the info guys. A lot more responses that I thought.
I was looking at these:
http://www.danscomp.com/107065.php?cat=BIKES
http://www.danscomp.com/101118.php?cat=BIKES
http://www.danscomp.com/101127.php?cat=BIKES
But I really dont know the difference with them all.
And what size would I need a 24"?