Celica Forums General Discussion Exterior TRD Spring Rate?

Does anyone know the spring rate of the TRD USA Lovering Springs?? Wanting to set the car up for autoX and am not sure if the TRD Springs that i have currently ( came on car) are as stiff as i want. Thanks

Aren't they progressive rate?

The Eibach Pro Kit's rates are 158F/208R lbs-in, and TRD's springs are made by Eibach, but about .1" lower. So I would expect TRD's rates to be slightly higher, maybe 165/215.

Thanks should be helpful... by the looks of things Progessive make the stiffest spring... higher spring rates then tein or tanabe... and also the eibach pro kit. Any other suggestions as to what would be stiffer?? I don't want to go lower then about 1.5" as that will put the Koni sports at risk.

Tein S-Techs are 1.4", and 170/220. I've heard Progress makes crappy springs, from more than a few people.

Well I checked out the Hotchkis Springs and they are definetly stiffer then most others so I will probably go with them.