So light it defies superlatives, Guru's fully customizable Photon HL turns once-formidable climbs into your personal stomping grounds. Knowing that weight is nothing without stiffness, Guru fortified this high-modulus carbon masterpiece with superb power transfer and world-class efficiency, while also tuning the carbon in all the right places for a smooth, sublime ride. At the root of this frame's gram-for-gram supremacy is the use of North American-sourced, military-grade carbon fiber, meaning the Photon tips the scales at under 670 grams for a 54cm, which makes it one of the lightest custom frames in the world. Even the paint keeps the weight low, with Guru's Specter clearcoat only adding 5 grams to the frame. Its gorgeous, flowing lines make it easy on the eyes as well. To up the ante even further, Guru includes a featherweight Enve carbon fork that rails corners with aplomb and guides you straight as an arrow in even the most hectic sprints.