Fuji Newest now has Fuji Altair 1 aluminum fames. I believe that Fuji Newest use to have Fuji Altair 2 aluminum frames. What is the difference between Fuji Altair 1 aluminum and Fuji Altair 2 aluminum frames and how much difference does it make in the frames?
The Roubaix frame (traditional style frame with horizontal top tube) is "Fuji Altair 2 custom butted aluminum with PowerDiamond down tube, Integrated head tube... Fuji carbon seat stays, Fuji Altair 2 aluminum chain stays,", and the Newest is "Fuji Altair 1 Compact aluminum with traditional round down tube... Fuji Altair 1 aluminum curved seat stay w/ rack mount, "
Now... is "Altair 1" the name of the frame or the kind of tubing? I would think that if the Altair 1 tubing was custom butted, they would say so.
Did they ever make the Newest (compact frame) with Altair 2 tubing? I don't know. Fuji's site used to have the specs for older bikes, but they redesigned the site a few months ago and since then it's only said "previous model year information coming soon". Could you tell the difference? Hard to say.
Fuji utilizes three different aluminum alloys. A6 is our revolutionary quaternary phase alloy and contains magnesium, silicon, copper and other proprietary elements. It is up to 35% stronger than other, more conventional aluminum materials used in bicycle frame construction. This particular combination of elements, combined with a unique heat treatment process, actually improves weld zone strength by 30% and allows for thinner walled tubes – and therefore, a super lightweight frame - without sacrificing strength and durability.
Altair 2 and Altair 1 alloys both start with the finest grade aluminum, which is then drawn and shaped to Fuji’s specifications. Altair 2 differs slightly in that tubes made of this material are custom butted – a more intensive process where wall thickness, or gauge, is manipulated to save weight in some areas of the tube without sacrificing strength.