Aztek took everything they've learned from fork research over the years and designed the ultra-lightweight Circa fork. Weighing in at a mere 163 grams, the Circa Fork is by far the lightest fork ever created. The Circa fork uses computerized stress analysis to remove the most possible material from the legs while still staying stronger than ever. New tube-butting technology allows for extreme weight removal from the tube, while keeping it strong. An included 8mm compression cap and bolt keep your headset tight throughout all your sessions.