Noah Fast Disc Shimano Dura-Ace Di2 - 2x12

The Noah Fast Disc’s geometry points to a low, long, race-first fit with some unusual details. In size M, the bike combines a 565mm stack with a 393mm reach, while size L moves to 591mm stack and 401mm reach. Those numbers are in line with a performance road fit, but the more notable figure is the stated seat tube angle: 74.5° in XXS, 74° in XS, 73.5° in S and 73° in M before dropping to 72.5° in L and XL. That steeper effective rider position in the smaller and mid sizes supports the model’s stated goal of encouraging a more aggressive aero posture, likely shifting the rider forward relative to the bottom bracket.

Handling numbers suggest a fast, responsive race bike rather than a particularly conservative one. Chainstays are short at 405mm in XXS through S and 408mm in L and XL, helping keep the rear end compact, while wheelbase remains tight at 987mm in M and 1007mm in L. Head tube angle ranges from 71.5° in XXS to 74° in XL, with 73.5° in M and L, which should give the larger sizes sharp, stable high-speed steering while the smaller sizes avoid becoming overly twitchy. BB drop varies from 68mm in the smallest sizes to 63mm in the largest, a size-specific approach that should help preserve handling balance across the range.