Here you will find a direct comparison between the Slam Specialties line of double convoluted AirSprings and those of our closest competitor, Firestone.

All data contained in the Firestone table is collected from Firestone's Engineering and Design
Manual(pg. 32) and is used solely for performance characteristic comparisons.
Model #
Max Diameter (Inches @ 100PSI)
note 1
Minimum Height
Maximum Stroke
Maximum Usable Height 4
Force at Maximum Stroke (80psi)

Force to Collapse
(minimum height at 0 PSI)

 Maximum Recommended Pressure
(PSIG)		 Slam Bag Replacement Model 2

25
6.4
2.8
3.3
6.1
660 lbs.
 19 lbs. 100 5 series
255 / 2500
6.4
2.8
4.2
7.0
900
 50 100 6 series
224 / 2600
8
2.8
4.9
7.7
1,030
 14 100 7 Series
26 / 2800
8.6
3.0
5.7
8.7
1,420
 23 100 8 Series

2500
6.5
3
4.9
7.9
900 lbs.
 45 lbs. 120 6 series
2600
7.7
3.1
6
9.1
1470
 45 120 7 series

 

RE    
RE-5 5.0 2.8 5.2 8 1108 150 200
RE-6
6.0
2.8
7.2
10
 1,571 130 200
RE-7
7.0
2.8
8.2
11
 2,262 300 200
RE-8
7.75
2.8
8.2
12
 2,821 80 200
HE
HE-6
6.0
2.8
7.2
10
 1,571 130 400
HE-7
7.0
2.8
8.2
11
 2,262 300 400
HE-8
7.75
2.8
8.2
12
 2,821 80 400
XS
XS-6
6.0
2.8
7.2
10
1,571
 130 600
XS-7
7.0
2.8
8.2
12
2,262
 300 600

Notes

1 Maximum diameter of Firestone shown is at their maximum recommended pressure.
However as pressure increases, so does the diameter. Slam Specialties sizes remain
constant at any pressure.

2 Slam Specialties AirSprings are built to be size and bolt pattern compatible with Firestone.
If you are currently using Firestone, the replacement model is designed to bolt up directly
to your brackets without modification.

4 The Firestone AirSprings have at least one inch of additional stroke above these numbers, but
Firestone does not recommend operation in this range because of possible rubber to plate separation
resulting in failure.

5. ContiTech information gathered from their Technical datasheets, more information can be obtained
at http://www.contitech.de/luftfedersysteme