I know its smaller then I think...then what's the 15 at the end of the three numbers mean? On the tire?

 

it's the rim size...

 

So...the size the tire says is only the rim size? I thought it was the tire size...I'm not the best with cars. Sorry.

 

Right... Metric tire sizes are stupid and overcomplicated. The first number is the width in millimeters, and the second is the ratio of width to sidewall and the third is rim size.
Basically, take the first number... divide it by 25.4, then multiply it by the second number as a decimal, then multiply it by 2, then add the 3rd number.
285/75 R16 for example:
285 / 25.4 = 11.22
11.22 * .75 = 8.42
8.42 * 2 = 16.84
16.84 + 16 = 32.84" tall tire.

http://tire-size-conversion.com/metric-tire-conversion/
Plug in your numbers there and it'll convert to inches.

 

So if I did this what would be the best way to lift the rear? Blocks? Or shackles? Because I've heard blocks can really ruin things?

 

I never knew that. That's really helpful. Thank you!

 

Shackles.

 

Blocks are just fine. I run 1.5" blocks. I would not go much over 2in for blocks.

I also run a 3in shackle cut down to 1.5in. Either way.

And I have a full length add a leaf.

They all do the job.

 

You CAN run blocks but shackles are the way to go. You are more likely to run into a problem called axle wrap which you look up if you use blocks.

 

I heard someone mention add aleafs my mechanic said those aren't really that good either? How come?

 

You're adding a new leaf to an old spring pack - it's not as strong or long lasting as buying a whole new spring. I guess it depends mainly on how old/worn out your existing leafs are.

 

All depends on your budget and what you are trying to accomplish.

All new springs are of course the best option. My add a leafs and blocks/shackles have been on almost a year. And my jeep is beat regularly. So far everything is holding up better than expected. Axle wrap is not going to matter on such a small lift.

 

Add-a-leaf is one of those "wasted money" mods if you plan to keep going up. Shackles can be left in place and added to a lift down the road. I use a lift shackle to compensate for the weight of my speaker box.

 

So, a better idea would to use shackles in the back? Now how exactly do the shackles work? And are the bb and coil spacer shackle set up gonna really stiffen the ride?

 

Are there many cons to this set up?