The Reaction 200 Pro is made from the same kind of heat-treated 6061 aluminium tubes that you'll find on our performance adult bikes. We also use the same mechanical tube-forming process to adjust tube shapes for the best combination of strength and weight. There's a full carbon fork with thru axle, to save even more weight. Disc brake mounts and cable routing allow for the greater safety and stopping power of discs. And a replaceable derailleur hanger insures against expensive repairs in the event of minor mishaps.