I've been trying to lose weight, and after I volunteered at an MS-150 my friend's dad rode, I became more interested and decided to start riding with his family. However, the only road bike I have is my dad's and it's 40 years old, a 1970 Peugeot, which could fall apart at any moment. Thus, I need good tips on a solid road bike that will last wear and tear, and my weight. Thanks!