could i customize this?

http://www.unicycle.com/schwinn-20-inch-retroblue-unicycle.html/
could i customize that unicycle with say a kris holm seat kris holm cranks animal peddles and other things. i started with that unicycle to learn but now i need to make it more for street.

no, it’s square hub
you may buy an other uni (KH, QX, Impact) and sell this one to a beginner