Rear air Shock Progressive Springs

[crazzy450z]

Hi all,
I'm riding a '83 GL1100 Aspencade with 112,000km (+-70k Miles) on it. I weigh in at over 300lbs. My rear shocks/springs need a rebuild. I seem to loose air pressure and do drag the center stand quite easily. I plan on using the Progressive springs and got the spring specs from Progressive.

00-1170 – free length (6.75”) / OD (2.426”) / ID (2.02”) – 120/160 spring rate

00-1170 is the spring that is the recommended for the GL1100 air shocks.
viewtopic.php?f=4&t=66503&hilit=progressive

Can anyone who is in around my weight comment on the progressive springs (front & rear) for a GL1100? I am usually riding solo with minor load in the bags/top case, but may have an occasional passenger. Did you still need to add air to make it ride properly or are the springs alone enough solo? If a little air is required that would allow me to diel the ride in.
Thanks,

[crazzy450z]

So I was informed that the tech from Progressive Suspension made an error when he sent me his reply..
The GL1100 spring data is actually as follows.
00-1170 – free length (6.75”) / OD (2.426”) / ID (2.02”) – 105/150 spring rate

The data for the GL1200 springs are as follows.
00-1172 – free length (6.50”) / OD (2.45) / ID (2.0”) – 120/160 spring rate

So to me they seem to be interchangeable if you wanted a higher spring rate for us "large framed" guys..
So I am still looking to see if any large guys are running air in their system, and how much. Or if anyone has tried the GL1200 springs on a 1100 to see how that worked..

[888GoldDragon]

I run the factory GL 1500 air shocks. I’m a big guy just like you I run my air shocks at 3.5 and I never have to change it even with the passenger they automatically go to four. One by itself passenger gets off. It automatically returns to 3.5.