I have a 8 degree stem on my bike and am considering getting a 0 degree stem that is not adjustable.
If my thinking is correct the 0 degree stem (assuming both are 110) will put my bars further away.
My ETT is a bit short and I thought of switching out my stem for this reason.
My seat is in a good position

It depends on how your present stem is mounted. Is it "up" or "down?"

You are giving up flexibility. I didn't know they made 0 degree stems.

Thomson has them

I'm not sure changing the angle will get you what you looking for adjustment wise? Is your current 8 degree stem flipped up or down? A zero degree stem will put you right in the middle of what you have now.

Fore-aft difference will be tiny. About 3mm if I remember high school geometry correctly.

Could end up closer depending on if your current stem is "flipped" or not.
If you want to be more forward, get a longer stem

I can't believe I am so late to this thread and still the first one to recommend OP use a stem calculator: Stem Comparison Tool | yojimg.net

Everything you need to know!

That's cheating !
Why spend all that time in math class?
Sin, Cos, Tan.....

OK. Dimensions RED: 120/-17/30 BLUE: 99/+6/30...."red stem shows 28 MM more reach"
I need help with this....It looks like the red line on the graph is straight yet the example shows -17. Also the red extension says 120 and the blue 99.... this is not a 28mm difference.
Tell me what I am doing wrong..

Thank you

One of your lengths is 99, the other is 120, and -17 to +6, so 2 big differences.
Are those the 2 choices you are considering ?

No I am considering 110 stems one with +7 or +17 and the other with 0 degrees

It is straight (relative to the ground,) because it is -17º. This is pretty simple geometry: the stem is -17º, the head tube is 73º, and 73+17=90º-- parallel to the ground. The added 7mm of reach is because of the respective angles of the two stems. If both stems being compared were 120mm, the -17º would still be an additional 9mm away due to the angle.

edit to add for the most recent post by the OP:

110mm 0º Compared to:
110mm +17º: 14mm shorter, 29mm higher
110mm +7º: 5mm shorter, 13mm higher

This is all based on 30mm of spacer height. The +7º stem with 16mm of spacer height is essentially the same as the 0º with 30mm (within 1mm of height and reach)

Type in your own numbers then.

0 degree stem is a bit silly, since it doesn't give a "flip" option.

My -10º stem isn't flippable as it's directional (Shimano PRO Vibe) and I wouldn't consider it silly. I've never felt the need to raise my bars 37mm, so at least for me nothing is lost by the stem not being flippable.