Semper Fi USMC
Join Date: Jan 2008
Location: Cantonment, FL
Bikes: 2012 CAAD 10 3 Ultegra, 1978 Medici Pro Strada
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I have a 2 level PLIF at L4-L5 and L5-S1 from a spinal compression. The position described above, as close as I can come, with the straight back using drop bars is the most comfortable and pain free position for me. The bike fit put me in the correct position with stem length and bar height in relation to the seat. the link fro 10-Wheels has what you need to fit the bike to you properly but the exact placement of the seat in fore/aft placement, its height overall and in relation to the top of your bars will be up to your physical abilities in terms of flexibility. As my back got used to riding on the bar tops and lever hoods I found I could take out about 15mm in stem spacers since I could bend further without pain. If I try to ride with the back hunched up, any at all, I get severe pain in the surgical site. Keeping my back as straight as possible relieves my back issues.
What type of bike (hybrid with straight bars, road with drop bars, mustache bars or others? Do you have any disk injuries or degenerative disease in the disk or vertebra? Even the crank length and pedaling can effect your back pain. If you want a book that you can get valuable fit information and how to from try Lennard Zinn's "Cycling Primer", http://www.amazon.com/Zinns-Cycling-...s=Lennard+Zinn
he has a great opening section on how to fit your self to suit your body's dimensions and quirks.
Sorry for the length and I hope you can get things sorted out, maybe a good LBS can help you out with a fitting session. they will probably charge you unless you ar ebuying a new bike but it would be worth the cost.
I can do all things through Christ, who strengthens me.
I did not choose to have Parkinson's Disease, but I can choose to not allow it to control my life. Its all up to me to overcome the trials, adapt and overcome!