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Originally Posted by
Redbullet
I don't think so, unless you are at an extreme seat back position and wanting to extend it even further. The area where you can "rest" your sit bones on a saddle is around 2 cm long - enough to absorb a seat back error of +/- 1 cm. Then, with a small adaptation of the body you can absorb even a little bigger error.
The increment of 2-3 mm is valid for saddle height setting, because here you have very little reserve to absorb errors.
I find that a cm of difference in setback actually makes a huge difference - 4.6cm setback and I can ride for 5 hours with no back issues, but 5.6cm of setback and I end up with a lower back ache.
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