Like I said,why would you buy I part that tells you I could break easier then most other parts. Smooth riding is for people that are happy with what they already know. If your not progressing, you should be home resting. Beginner or pro your bike is gonna drop if your pushing your riding. Therefore eastern parts are good for your girls friends bike. they come in pretty colors for her to like her to enjoy already...? By the way its 508 not 506... Not tosmooth are you?