Dynamic fit unit

1. A method for fitting a bicycle to a rider, comprising the steps of:

determining an optimal bicycle frame size for a rider based on operational characteristics provided by the rider;

determining a best-fit bicycle frame size that is a closest match to the optimal frame size based on a comparison of available frame sizes stored in a database, the best-fit bicycle frame having a head tube, a seat, a handlebar, a bottom bracket, and a seat tube;

determining at least one of the optimal X,Y location of the handlebar relative to the bottom bracket based on the location of the rider's hands, and the optimal X,Y location of the seat relative to the bottom bracket based on the location of the rider's derriere;

determining a stem and spacer from a list of available stems and spacers that will best fit between the head tube of the best-fit frame and the optimal X,Y location of the handlebar;

determining a seat post from a list of available seat posts that will best fit between the seat tube of the best-fit frame and the optimal X,Y location of the seat; and

producing a list of the best-fit frame, the best fit stem and spacer, and the best fit seat post.

2. The method of claim 1 , wherein the step of determining a best-fit bicycle frame size, further comprises:

using a parts list of available bicycle frames to generate a first cloud of points that relate the X,Y coordinates of the top of the head tube, and the X,Y coordinates of the top of the seat tube, relative to the bottom bracket, for each respective frame in the parts list, determine the best-fit frame that is a closest match to the optimal frame.

3. The method of claim 1 , wherein the step of determining a stem and spacer from a list of available stems and spacers that will best fit between the head tube of the best-fit frame and the optimal X,Y location of the handlebar, further comprises:

using a parts list of available stems and spacers to generate a second cloud of points that relate the location of the handlebar to the location and angle of the stem post with spacer for all possible stems and spacers in the parts list, rotate and translate the second cloud of points to match the XY coordinates and angle of the top of the head tube of the best fit frame.

4. The method of claim 3 , wherein the step of determining a stem and spacer from a list of available stems and spacers that will best fit between the head tube of the best-fit frame and the optimal X,Y location of the handlebar, further comprises:

from the rotated and translated second cloud of points, define a subset of the second cloud of points that will fit both the best-fit frame and the rider's hands, which defines a usable subset of stems and spacers relative to the best-fit frame.

5. The method of claim 1 , wherein the step of determining a seat post from a list of available seat posts that will best fit between the seat tube of the best-fit frame and the optimal X,Y location of the seat, further comprises:

using a parts list of available seat posts to generate a third cloud of points that relate the location of the seat post top relative to the seat post bottom for all possible seat posts in the parts list, rotate and translate the third cloud of points to match the XY coordinates and angle of the top of the seat tube of the best fit frame.

6. The method of claim 5 , wherein the step of determining a seat post from a list of available seat posts that will best fit between the seat tube of the best-fit frame and the optimal X,Y location of the seat, further comprises:

from the rotated and translated third cloud of points, define a subset of the third cloud of points that will fit both the best-fit frame and the rider's derriere, which defines a usable subset of seat posts relative to the best fit frame.

7. The method of claim 1 , further comprising:

determining at least one item of riding apparel suitable for the rider based on anthropometric data relating to the rider.