If what we’re seeing on one of their international sites is true, the 2015 Giant Defy endurance road bike lineup becomes the first from a major bike brand to take an entire model and go disc brakes only. Well, for their Advanced (carbon) models anyway – the alloy Defy offerings keep the rim brakes.
While we don’t have official information from the brand yet, a few things are apparent. The frame appears to be entirely new, sharing nothing of the outgoing Advanced models. The biggest visual difference is the switch to thinner seat tube rather than the more aero looking, cut-out shape on 2014 bikes. The D-Fuse seatpost spec indicates it shares the shape with their TCX Advanced carbon cyclocross bikes, even sharing a hidden seatpost binder. The head tube junction is mush thicker, leading into larger cross sections on both the top and downtubes before both of those taper toward the rear of the bike. The fork legs are dramatically larger, too, with the crown settling into the frame a bit as an aero nod.
The 2015 Defy Advanced 1, shown above, gets a mechanical Ultegra build with TRP Spyre mechanical disc brakes. While the spec info we have may or may not be accurate for the US, it’s listing Giant P-R2 Disc rims with Performance Tracker hubs, which look to be a new wheel system since there’s no mention of them on Giant’s website yet. They’re wrapped with Giant’s 700x25c P-R3, likely a lighter weight folding bead version of the current R3AC all conditions road tire. The fork is listed as carbon with a “Hybrid OverDrive steerer”, which implies a 1-1/8″ to 1-1/4″ taper and possibly some alloy around the crown race but still using a carbon steerer (our guess).