I just wanted to know the difference between the two bags. I want to get new rear bags that give 13 inches of lift but they only come in 2600lb. So will they work or will custom mounts have to be made.

 

Shawn, your post is pretty vague. I don't know of any "2500" or "2600" bag that actually gets 13" of lift. When you say lift, that refers to the stroke. If you are talking about the rear of an xB, what you want is a "2500." I don't know if anyone has tried to use a "2600" bag in the rear, but it is a good possibility that you would get significant rubbing.

What brand bag are you looking at? I can give you bag specs. if you know.

 

These are the bags i want to put in the back
3 1/2" Compressed
13" Expanded
7" Diameter
7.25 Compressed & Collapsed GO UP NOT OUT!

 

If I am not mistaken, those are the Airlift (Goodyear) Gen. 2 bags. Here are the actual specs from the manufacturer...


2B-6 Extended
PSI Rating: 180
Min. Height: 2.8"
Max. Height: 9.5"
Stroke: 6.7"
Max. Diameter: 6.8"

2B-7 Extended
PSI Rating: 180
Min. Height: 2.9"
Max. Height: 9.5"
Stroke: 6.6"
Max. Diameter: 8.2"

I may be wrong, but my bet is that this is what you are really looking at. Apply a load to those bags and they will not stretch to 12"+.

 

about a hundred lbs hahhahahhaha look at the name

 

I realize that but i mean do they mount up the same. Or will they have to be modified to fit.

 

Just get youtself 2500s and call it good. There is not enough advantage to running 2600s to make them worth the work to try and make them fit. They are bigger around and may rub on suspension components. They also use a different bolt pattern. If you are really wanting a large stroke out of the rear suspension my suggestion would be to use a Slam Specialties RE-6. It is the most stroke you are going to get out of a "2500" and you won't have the possible problems of having to large a bag. Besides, the load rating of the "2600" is way too much for the rear of an xB.

Specifications:
PSI Rating: 200
Min. Height: 2.9"
Max. Height: 10"
Stroke: 7.1"
Max. Diameter: 6"

 

That big bag may cause some problems ont he back. If you run them you are going to have to make sure the brake lines and wires are long enough to get up that much higher. Also if your tring to get low a bag that only gets 31/2 inchs when its compressed, may not let you sit as low as you could.

Some of these tall tags are meant for the 4x4 guys who are bagging lifted trucks. So I'd be real careful running them.

The sleave bags that came with the airlift kit were more then enough to lift mine higher then stock, with stock shocks.