I bought an Author Basic (2012) with a 17" frame.
But I have some back aches after 2 or more hours of cycling (just cycling or with little jumping) and sometimes I feel a little unsure while riding (discomfort).
I think it's about frame size. My preferred frame size is 18" and I figured this out later. I can't give the bike back to the store.
When I had Mongoose Tyax Comp (2010) in size S with Kenda Small Block Eight tires I felt more comfortable and self-assured than on my current bike.
So what can I do now?
My brother says that I can lift my seat back a little + buy new longer stem and it can help to win couple inches but I don't know if it can really help.
Or maybe there are some different and more convenient way?
I have no money to buy new bike or new frame, so I'm hoping to find a tweak or solution for my current bike.