what I mean is are all 412 series springs the same load for a given type? meaning are all 412 heavy duty springs basically all identical in capacity whether they are 11" or 13" or whatever length? Or is a Dyna 12" different than a touring 12"?
With out kno wing for sure , I'd think they are different from bike to bike because of weight of the bikes are different. A quick call to Progressive would be the best answer, that or Howard at Motorcycle Metal.
2010 FLTRX , Stage 1, 13" Madstad, Mono tubes, SuperShox, Heritage style bars. Alpine CDE-HD149BT,Soundstream Picasso Nano Series PN4.520 , 5X7 and 6.5 Infinity Kappa speakers
If I have to explain ,you wouldn't under stand anyway.