Bike fit - petebachant/petebachant.github.io GitHub Wiki

Using competitivecyclist.com

Input data

  • Actual inseam: 31.5 in
  • Trunk: 27.5 in
  • Forearm: 12 in
  • Arm: 22.5 in
  • Thigh: 22.5 in
  • Lower leg: 20.25 in
  • Sternal notch: 55.25 in
  • Total height: 67.5 in

The Eddy fit

image

  • Top tube length: 52.2--52.6 cm
  • Seat tube range CC: 53--53.5 cm
  • Seat tube range CT: 54.6--55.1 cm
  • Stem length: 9.4--10.0 cm
  • BB saddle position: 67.6--69.6 cm (26.6--27.4 in)
  • Saddle handlebar: 50.9--51.5 cm (20.00--20.27 in)
  • Saddle setback: 5.5--5.9 cm (2.16--2.32 in)
  • Seatpost type: setback

Using wrenchscience.com

  • Frame Size center-to-center: 50 cm
  • Frame Size center-to-top: 52 cm
  • Overall Reach: 61.95 cm
  • Saddle Height: 68.41 cm
  • Handlebar Width: 40 cm

52.5 cm top tube Honey Allroads

  • Crank length: 170 mm
  • Stem length: 100 mm
  • Stack: 564 mm
  • Reach: 374 mm
  • Saddle tilt: 1--2 degrees nose down
  • Crank axis to top of saddle: 25.88 in
  • Saddle tip to bars: 20 in
  • Saddle tip to crank axis: 2.25 in

51 cm CFR505

  • Crank length: 170 mm
  • Stem length: 90 mm
  • Stack: 551.3 mm
  • Reach: 362.6
  • Saddle tilt: 1--2 degrees nose down
  • Crank axis to top of saddle: 25.88 in
  • Saddle tip to bars: 20 in
  • Saddle tip to crank axis: 2.63 in

The Truckbike

  • Crank length: 170 mm
  • Crank axis to top of saddle: 26.13"
  • Saddle tip to bars: 19.13"
  • Saddle tip to crank axis: 1.63"

54 cm Specialized Diverge Comp

  • Crank length: 172.5 mm (fitter recommended 170 mm)
  • Stem length: 100 mm (fitter recommended 90 mm)
  • Crank axis to top of saddle: 26.625
  • Saddle tip to handlebars: 20.25 in
  • Saddle tip to crank axis: 2.0 in (may be out of date; check)
  • Saddle tip to sit bones: 8.0 in
  • Saddle tilt: About 2 degrees nose-up (measured with a book on top to contact highest points) -- fitter recommended about 1 degree
  • Stack: 565 mm
  • Reach: 380 mm
  • Sit bones to bars: 28.25"

53 cm Niner RLT-9 Steel

  • Crank length: 165 mm
  • Stem length: 110 mm (switched to 90 mm)
  • Crank axis to top of saddle: 26.75 in
  • Saddle tip to handlebars: 20.0 in
  • Saddle tip to crank axis: 1.63 in
  • Saddle tip to sit bones: 8.0 in
  • Saddle tilt: Level (using book on top)
  • Stack: 579 mm
  • Reach: 375 mm

Shoes

  • Left foot ball--midpoint: 7.13"
  • Right foot ball--midpoint: 7.00"
  • Right cleat setup to be centered on ball--midpoint (compensated for back of thickness of shoe) or with the ball 1/4" forward, straight on, and maxed out to keep Q-factor as narrow as possible.
  • Left foot same fore--aft, moved outwards to the max, with a slight toe-out. This seems to help with sitting square on the saddle and knee pain. Definitely have wider Q-factor on left foot when riding on flat pedals.

General observations

  • Saddle height at 27.5" caused some right knee pain, which went away moving down to 27". However, see below.
  • Knee pain on 90 mile ride from ME to NH seems to have been caused by pedaling with knees bowed outward or maybe from saddle too far back.
  • Longer stem with 51 cm Quest seemed to help with lower back pain.
  • After getting pro bike fit, then moving saddle back 3/4 in or so, was getting really bad knee pain, especially on the left. Moving saddle down about 1/2 in helped massively. Probably has something to do with pedaling heel up versus down.
  • With stance widened and feet toed out after fitting, left knee pain got pretty bad. This seems to be relieved by simply pedaling more smoothly around the stroke, and not allowing the left arch to collapse as much, keeping the knee straighter.