Argon 18 E-117 Ultegra Di2

The 3D System is the headline feature of the E-117, and it's a substantive engineering difference rather than a marketing label. Traditional triathlon cockpits offer roughly 30mm of available stack adjustment, which forces many athletes into positions that don't fully match their fit or toward aftermarket solutions that add drag. Argon 18's 3D System replaces the conventional top bearing arrangement with a custom spacer in which the bearing is integrated, available in three different heights for each frame size. The result is 60mm of available stack adjustment — double the conventional range — without stacking standard spacers. The integrated bearing design also preserves 5–11% more frontal rigidity than standard spacers at equivalent heights, so the additional adjustability doesn't trade away cockpit stiffness. For athletes who revisit their fit seasonally or build toward different race distances over time, this system is genuinely useful across the life of the bike.

The geometry is engineered specifically for long-course triathlon. A 78° seat tube angle across all five sizes positions the rider aggressively over the pedals — loading the posterior chain for sustained power output while reducing anterior muscle strain during the bike-to-run transition. The 413mm chainstay is consistent…