The Scott Spark LTD boasts that it’s the lightest full suspension mountain bike available, but Cannondale released its Olympic mountain bike edition of the Scalpel which is actually 1.6 lbs lighter. The Scott Spark LTD does possess some cool technology. It weighs 20.6 lbs. The Cannondale Scalpel Olympic weighs 19lbs. The new Trek Fuel EX 9.9 now weighs in at 23.5 lbs. Taking a Cannondale Scalpel carbon fiber frame with a carbon fiber lefty and a carbon fiber seatpost and handlebars will most probably reduce easilty the weight of the Scalpel. The other thing that is pretty heavy on these bikes are the wheels. A pair of carbon fiber wheels will make a big difference. This is what they used to make that Cannondale/Vredestein so light, plus a few tweaks.