get_all_the_metrics: Get some useful frame metrics
In ghuiber/bicycle: Design a bicycle frame

Description Usage Arguments Details Value

Once you have a frame design df you can use this to derive some metrics that will help gauge the ride characteristics.

get_all_the_metrics(
  df,
  angle_btw_css = 14,
  wheel_diameter = 622,
  crank_arm_length = 170,
  old_spacing = 130,
  bbs_width = 68
)

`df`	A frame design tibble, such as the minimal one drawn by `wrap_frame_dims()` or the one augmented by `find_ht_extension_and_add_true_fork()`.
`angle_btw_css`	Angle between chain stays, in degrees.
`wheel_diameter`	Wheel diameter in millimeters; 622 is the bead seat diameter of a 700c wheel. To see the effect of the tire width, add 2 x tire width in millimeters – i.e. specify `wheel_diameter = 622 + 2 * 32` for a 32 mm tire.
`crank_arm_length`	The crank arm length in millimeters. Typical values are 165, 170 and 175 for adult riders.
`old_spacing`	Over-locknut-dimension (hub width) in millimeters.
`bbs_width`	Bottom bracket shell width. It's standard – 68 mm is typical for road bikes.

Effective top tube length is measured from the center of the point where the top tube meets the head tube to the center of the seat post, which in the drawing rendered by add_the_ett_to_the_drawing() looks like a faint line that continues the seat tube. An alternate way is to measure it from the top of the head tube to the center of the seat post. The two are the same if the head tube and the seat tube have the same angle, because they are just the long sides of a parallelogram.

A named vector

ghuiber/bicycle documentation built on Dec. 20, 2021, 10:46 a.m.