http://www.bikeradar.com/...sc-first-look-47693/
First, I'd like to mention that this bike looks MUCH better than its rim brake counterpart.
Second, it's not faster:
In terms of aerodynamics, the ViAS Disc gives up a few seconds to the rim version. Chris Yu, Specialized’s head of applied technologies, said that at low wind angles, from +/-5 degrees yaw, the disc bike is 2-4 seconds slower (over that 40km at 40kph) than the rim bike. At greater yaw angles, such as 10-15 degrees, the difference grows to about 10 seconds if the wind is coming from the non-drive side and hitting the rotors. If the wind is coming from the drive side, however, the difference is just 2-4 seconds, Yu said.One thing I noticed is that they didn't seem to make much of a change to the front fork. One of the few arguments I've seen in favor of disc brakes is that it opens up possibilities with the fork, specifically around the fork crown.
The only argument I can make in favor if disc brake rotors is the ability to build compliance into the frame.
Otherwise, all I really want is through-axles on my tri bike. I know it's overkill but I just like the idea. I could care less about disc brakes.
First, I'd like to mention that this bike looks MUCH better than its rim brake counterpart.
Second, it's not faster:
Quote:
In terms of aerodynamics, the ViAS Disc gives up a few seconds to the rim version. Chris Yu, Specialized’s head of applied technologies, said that at low wind angles, from +/-5 degrees yaw, the disc bike is 2-4 seconds slower (over that 40km at 40kph) than the rim bike. At greater yaw angles, such as 10-15 degrees, the difference grows to about 10 seconds if the wind is coming from the non-drive side and hitting the rotors. If the wind is coming from the drive side, however, the difference is just 2-4 seconds, Yu said.
The only argument I can make in favor if disc brake rotors is the ability to build compliance into the frame.
Otherwise, all I really want is through-axles on my tri bike. I know it's overkill but I just like the idea. I could care less about disc brakes.