Go easy on me, I'm pretty clueless when it comes to bike mechanics. I bought a Downtube 8 back in 2006, rode it a few times and it ended up in storage until today. The front brakes seem grabby to me. It's rideable but pedaling seems more labored than it ought to be. And the bike doesn't roll back and forth very easily. Is this normal? The brake pads seem tight to the tires. I adjusted the tension screw to see if that would make a difference but it didn't. Any ideas?