Definitions for "Down Tube"
Keywords:  bracket, bike, bottom, tube, tubeand
This is the tube that connects the head tubeand the bottom bracket together. It is the tube that your seatpost fits into, and is sometimes used in the measurement of your bike size.
Part of the bicycle frame which slants downward at an angle. It runs from the head tube to the bottom bracket.
The tube that goes from the fork to the crank.