3t aura pro comfort tt barsaura comfort offers the rider an adjustable wider arm stance than the standard aura pro spacing between the cradles ranges from 105mm to 270mm standard aura pro model has 80 mm spacing wide aero clamps assembly sets fixings in a curve so the cradles with wider comfort pads angle inwards and better support riders elbows in a wide aero stance otherwise specification is identical to the standard aura pro carbon fiber basebar is 40cm or 42cm alloy s bend extens