A few basics. The saddle fore/aft position has nothing to do with your arm. Some fitters use the knee-over-pedal method (KOP). While KOP is popular, it's also nothing but a starting point and likely to place the saddle too far forward. Read Steve Hogg's suggestions on saddle fore/aft.

Saddle height can be roughly set by positioning the saddle so your foot is horizontal, with the leg fully extended, at the bottom of the stroke. What you want, during pedaling is not a fully extended leg, but about a 30 degree bend at the knee. Most people pedal heels-up at the bottom of the stroke and it only takes a 2-3cm rise of the heel to create that much bend at the knee. If the initial setting pulls at the back of the knee and feels too high, drop the height a few milimeters at at time until that feeling goes away.


Saddle angle is ciritical and most seat posts have a poor mechanism for adjusting that angle. Model with a single clamping bolt and a serrated surface to hold the seat rail clamp in position are not the best. Get a seatpost with a 2-bolt rocker-style clamp that allows infinitely small adjustments to be made.

Saddle discomfort is very common for new riders, but even experienced riders can have problems, if their favorite saddle wears out and that model is no longer made. Finding a new model that's comfortable can be a long process. I tired four different saddles to replace my favorite Fizik Gobi, but none of them were tolerable, including the current Fizik Gobi, with it's revised shape.

You've mentioned a 33 inch inseam, but is that pants inseam or a carefully measured cycling inseam? I suspect the former, in which case, your cycling inseam will be quite a bit longer. A 33 inch leg length at your height would be quite short.