haha and welcome to my world when i first started reading, so i will go in order
6 foot tall pift you are short in my family
spokes rule of thumb is more = stronger, as they are taking you body's weight and they take the abuse when you hit curbs,rocks,holes and people ( avoid the last one please) . think of it as more points of contact between the rim and the hub of the wheel.
( there are exceptions to this rule wheels built well by hand are going to be stronger than the machine built ones, i would take a 32 hand built over a 36 machine)
The "sizing" of the wheel is different again my understanding ( which is limited) is the following
- 700 cc are on Roads and hybrids the x22 or x28 is the width of the tyre so 700 is the diameter and 28 is the width. Example 700x28 ( i don't ride a road or a hybrid so i may be wrong
- 26" is the common size for a mountain bike once again 26 is the diameter and the the1.75 is the width so you get tyres with 26x1.75 or 26x2.1 .
- 29" are on some mountain bikes and you will have to ask someone else about these i have no clue
-same for a 650 road bike wheel..... not a clue
When people say 18" frame .... they are midgets
err i mean that is a small frame. How they measure it seems to change from company to company
i will let someone with more knowledge answer that better.
They are measuring the frame mountain bikes i have noticed tend to be measured in inches, like mine is a 24" . road bikes in Cm's as for what will fit you well you need to be fit by a professional for the most accurate information, while stab in the dark you would want a 24 Mountain bike frame and i can not even guess on a road bike there is to much i don't know .
I ride a Trek 4300 disc 24" frame i love it , i don't know if i would recommend it as i have done damage to mine in the time i have been riding. Some of that is weight related other brain snap related
. I brought it when i knew very little and at 6 feet tall you will have you pick of the second hand bikes both road and mountain.
some one will come along and blow my post apart i am sure
so i will just finish up saying welcome, have fun and say WEeeeeee down the hills .
Edit :10 wheels that is cheating.... but a good idea