I know, I know you have heard it a million times! If you drop weight you will climb faster but how do you do it. You lose it from your body or you lose it from your bike. However it costs more to lose it from the bike than it does from the body. If you must spend your money on the bike and want to climb faster then its time to look at rotational mass. Look at the parts of your bike that move before you start spending money on lighter static parts. If you are going to replace your wheels make sure that its the rim that is light vs the hub. Reducing rotational mass at the rim will allow you to spin up the wheel much quicker and easier then if the wheel was heavy. However a lighter wheelset has a harder time maintaining speed. Also don’t forget that more often than not being aerodynamic will increase your speed overall before being light. A good bike fit will also do wonders for your performance and even your recovery.
If you do not want to spend the money for lighter parts and are willing to take the time to lose weight off your body remember the following. Its better to drop weight in the off season and that you should never try to lose more than 2 lbs a week. If you are trying to lose weight during the on season and you are competitive or trying to reach goals you put yourself at risk. Risks include bonking when its important not to. If you are losing more than 2 lbs a week you are losing muscle! This is goes against what you are trying to accomplish. If you have hard time loosing weight any time it maybe time to seek the experience of a nutritionist.