The first part of a great article on The Biking Hub about how to reduce the weight of your mountain bike:

What is it about a lightweight bike that excites us so much? Is it just marketing hype? Or is it the opportunity to compare your bike to the pros bikes? Whatever the motives, and when money and durability don’t matter and performance is paramount, you can really push the envelope weight wise. It’s also safe to say that a lot of us are suckers for gear that lightens up our rides. In fact, one of my favorite mountain bike rituals is the ceremonial lifting of other people’s bikes in the parking lot before the ride begins.