It's a 2010 cervelo rs in 54, 172.5 cranks, 110mm set at -6, 15mm of spacers from top of headtube to stem, hope this helps*Disclaimer:
from my iPad using Tapatalk HD
I am in no way a professional bike fitter. It's just an interest of mine and a way to help my riding buddies get the most performance from their bikes. My observations and recommendations are not to be taken as 100% correct.
Based from your inseam measurement, I used anthropomorphic data from a study to "guestimate" your physical measurements. And taking your bike's (Cervelo) frame geometry I plugged these into an anatomical model.
My observations from the model:
- The 54 frame size is good for you. TT + stem length gives a riding position on the bars at a comfortable upright 47°.
- Saddle height of 72 cm to 73 cm is optimal. Your legs still do not reach full extension at this height.
- A saddle setback of about 2 cm to 3 cm is good to get your "knee (roughly) over the pedal spindle".
Gathering from your previous posts and comments from the other posters, this is what I think:
- Sore lower hamstrings and pain at the outer knee (where the hamstrings attach) is a sign of leg overextension, probably due to a high saddle.
- You might have a leg length discrepancy, taking your left leg giving more power than the right when the saddle is raised.
- Your saddle height lowered to 68 cm feels alright with the pedal at the 6 o'clock position, but feels awkward at the 3 o'clock position. Moving your saddle back by 8 cm feels better. Might be you have a longer femur-to-tibia ratio than normal?
- The wide saddle might be causing you to overreach on the downstroke. The 155 mm saddle is usually for women who have wider pelvises than men. Have your pelvis width checked to determine the correct saddle width for you.
Hope this helps.