i have been using my Schwinn Solara for the past 4+ years and have put in a decent amount of time in it. It has been a valiant steed, but I can tell it is braking down. I know this is a “cheap beginner” bike. I would love to get a new, or new to me, bike. But I have limited funds. Shocking. I cringe at anything over $500 (about £430). I feel as I have reached or nearly the end of this bikes life. Should I slowly upgrade my current bike, or save and save and get a new(ish) bike. I am worried the bike is also limiting my ability. I push as hard as I can but I feel like I am fighting the bike more than the terrain. Thanks in advance.