Seattle Bike Supply Recalled Redline Bicycles Due to Fall Hazard. The head tube can separate from the frame, causing the rider to lose control and fall. This poses a risk of serious injury. Incidents/Injuries: Seattle Bikes is aware of eight reports of head tubes separating from the frame, including four reports of minor scrapes and cuts. Description: This recall involved all 2008 Redline D640 bicycles. The bicycles were sold in black and have aluminum frames. ''REDLINE''is written down the frame's tube. The model number is written on the frame's top tube.