Carbon Mountain Bike Rims

How can I upgrade/make my steel mountain bike lighter?
I own a 1997 Trek 930 Singletrack mountain bike, which I really love riding. It has all original factory components, except for the clipless pedals I installed. It’s a hardtail bike with front RockShox suspension and has rim “V-brakes”. At 27 pounds, its a pretty hefty bike compared to the new ones these days. Here is a link to the specs on my bike: http://www.bikepedia.com/quickbike/BikeSpecs.aspx?Year=1996&Brand=Trek&Model=930%20SHX&Type=bike
I’m definitely not in the market for a new bike, but I’d like to upgrade my current ride with lighter components. I prefer aluminum material over carbon to keep costs down. Any suggestions?
Thank you!
Just some additional info, I ride in Florida, which 90% of which I ride is man-made trails. Nothing extremely rough or rocky like you would find further north of Florida.
I don’t think that the weight of your bike is a problem for the type of riding you do. Lighter weight is of benefit if you ride in the hills, but on flat roads and trails, there is not much that saving a couple of pounds in weight is going to give you. Your bike has an older 7 speed drivetrain. To do any upgrades that would be an improvement, you would have to go to 9 speed which is an expensive upgrade, your shifters, wheels, chain and cassette would have to be changed, and your derailleurs as well. You might also need to change the crank. Changing that many parts would cost more than you paid for the bike. The only upgrade that makes sense, performance wise is to buy better wheels and tires. However, good wheels are expensive, you would pay almost as much as you did for your bike to buy something that would make a noticeable difference. If everything is working well, just replace parts that wear out as needed
Easton EC90 XC UST Wheels

