I just bought a ab wheel and have been doing it for a few time by now but I noticed that a lot of videos on YouTube with ripped guys showing how to use the ab wheel they use much bigger wheels than mine.
Are bigger wheels better than smaller wheels ? If not why their size varies and which size is better for me? I wonder that the ripped guys use bigger ones for a reason right?
My AB wheel is about this size :
And I've seen guys using ones about this size :