Progressive Suspension is evasive on the spring rate for their fork springs and only touts their perception of the advantage of a progressive rate spring.

I am particularly interested in model DA222048 which is a standard height bagger spring.

Has anyone measured Progressive brand bagger spring rates

 

Where's the Progressive DA222048?

 

DS is Drag Specialities

PN - DS222048:
http://www.dragspecialties.com/produ...umber=DS222048

As you can see it is common in most FL's with 41mm forks and billed as the "performance replacement"
Drag does not give the Progressive PN

Progressive offers 2 versions of the 41mm spring: Heavy Duty and Standard

I understand the arguement for linear VS progressive rate springs and would like to know the spring rate on the Progressive brand progressive springs for the FL

 

Progressive Brand doesn't show a spring progressve rate graph, but they do publish Technical Specs. They show the Standard Duty# 11-1131, but oddly not for the Heavy Duty# 11-1536. You might contact Progressive for the 11-1536 specs

http://www.progressivesuspension.com...-Tech-Info.pdf

 

I wonder what the crossover PN is between Drag and Progressive

I would love to see a graph showing the rate progression.