Hey all. I have a few questions. In addition to kayaking, I've decided to become more active. I've purchased a new bike (Schwinn Trailway Hybrid, Men's 28") and I really don't know anything about them. Below are a few (probably elementary) questions I have. Are there general rules for shifting? I know you obviously need to be pedaling, it depends on terrain and what 'feels right', and I can tell that the front gear changes are more drastic than the back... is that all there is to know? What's the ideal position height for the bars and seat? It feels fine, I guess, but I really don't know what's normal. And I don't mean exact position in height, I mean relative to the body, are there any general rules? I've read briefly about the derailleur. What exactly does it do? How will I know if it needs adjusting? The recommended PSI for my tires are 50-75; I've filled them to 60 and they seem pretty rock solid, is it okay to keep going? I know I probably shouldn't max them out but with a range like that I'd expect them to be able to handle 65-70. Beside checking tire pressure and ensure everything is tight, is there general maintenance I should perform? Any other information for a new biker that you think would be beneficial is greatly appreciated!