SPRING RATES
On the REVO-A Softail shocks 2000-2017, if the springs are labeled "Legend 850" those are the Standard-Duty Springs, and "Legend 1000" is the Heavy-Duty Spring.
NOTE: Heavy Duty application is recommended for 250lb.+ rider and passenger total weight. Also consider heavy-duty if the majority of your riding is 2-up with a passenger and/or gear.