If I recall it was 50lb. Don't hold me to it, but I recall reading it somewhere.
The tender spring is just there to keep the main spring in tension while the suspension is at full droop. Under compression it is at coil bind. Therefore it does not affect rate.
Re: Spring rate on H&R coilovers (Big Fundamental)
yes I know... this is why I want to add them to my current setup.... BUT, I have no Idea what spring rate I should be running. I know that Eibach makes a collar and tenderspring that will work perfect with my current springs, it's just a matter of figuring out which springs to order.
Not sure if the helper springs between manufacturer's differ a whole bunch, but I'm sure if you called FK they would have a good idea. They seemed to be pretty knowledgeable about spring rates when I called...
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