I am thinking of taking off my 16 inch stock jk sport wheels which are 29 inches tall and replacing them with 17 inch rubicon wheels which are 32 inches tall. I assume that after doing this switch I will gain an inch and a half of height on my jeep. Is this estimation correct? Also how much width will I gain from the tire change?
You'll need to look up the sectional width of your tire on it's old 16" rim, then probably the new tire on it's new rim. Depends on brand/size/rim, you didn't provide a lot of details.
Your new tire will probably be around 1.5" wider, give or take. I would imagine that since the backspace probably doesn't change (probably), that means 3/4" out and 3/4" in. That's still inside the flares, just go to a dealer and look at a stock rubicon.
'14 Anvil JKUR (sold the '12 at 52K miles)
'13 unlimited stripped sport (red one)
'13 JKU sport (blue one)
'10 Unlimited sport (other red one)
'08 Unlimited X (green one)
Honestly Echo, I would really look into getting a set of aftermarket wheels to go with any new tires you purchase. Just skip getting the OEM 17" all together. Don't let it sound to extreme for this purchase. It really isn't and the longer you have your jeep you will know why.
98 XJ 02 TJ 10 JK 13 JK
2013 JK - Lifted w/ 35s - Bilstein 5100s - Monster TB - Chopped Flares - Can't Keep It Clean
If your main concern is MPG and a having a tire good enough to wheel for a little off roading. Check out 33x12.5R15 good year duratracs on 15x8" wheels. Less weight than stock 17" rubi wheels and tires and less rolling resistance but they are 33" vs 32".