I took the time look into my Elka Shock setup last week and it got me thinking about spring rates and possibly upgrading to a slightly stiffer spring. I really like the ride most of the time but with 3 or 4 guys big bumps are too much and we do bottom out.
Front springs are Coil Spring, Part No B4.5X356, 2.53in. ID, 252 lbs/in rate, 14.01 in. long
Rear springs are Coil Spring, Part No B5.4X305, 2.53in. ID, 303 lbs/in rate, 12 in. long
For guys looking to soften the ride a bit with Fox shocks this is likely a good start but I could see going up at least 25lbs/in for anyone with that doesn't primarily ride with kids or just 2 adults.
Looking at springs hyperco has a good selection of springs in 25lb increments.
At this point, I'm going to ride with it as is and try the 31's with a bit more ride height.