Bicycle Fitting and Sizing

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Why Fit

Different Philosophies

Serotta

Serotta has been a leader in bicycle fit for quite a while. The established the Serrotta Cycling Institute to further the goals of a better understanding of bike fit.

Fit Bikes

Local Fitters

  • NorCal Cycling in Santa Rosa. $75. They do a pretty good job. Much better than the average bike shop in the bay area. This is where I send most people that need a basic fitting.
  • Whole Athelete, San Anselmo, CA, $220-295
  • Craig Upton of Performance Lab HC , $150
  • PK Racing, in Fairfax. $450-500. Primarily pro road/tri experts. They are very expensive and I have no personal experience with them other than the fact that they are only 3 blocks from my house.
  • Cycle Sport, in Oakland. $125

or search Serotta by zip code

Links

Some Traditional Numbers

Crank Length

18.5% from top of femur to floor.

  • Inseam to 31 inches: 170 mm.
  • Inseam 31 to 33 inches: 172.5 mm.
  • Inseam 33 or more inches: 175 mm.

Knee Angle

30-35 Degrees. More bend conserves more energy, less bend for more power.

Saddle Height

Inseam x 0.883 = Top of the saddle to the center of the bottom bracket.

Trunk Angle

About 30-40 degrees from level. (45 at most)

Shoulder Angle

90-100 degrees.

Elbow Bend

15 degrees

Stem Length

When in drops, axle obscured by bars.