TRD Springs?
Jun 17, 2006 | 09:54 AM
#2
Contributing Member
Joined: Oct 2002
Posts: 5,089
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From: Duvall, WA
TRD coils are progressive. That is, they have two different spring rates in one spring. A top section that is easy to compress and a lower section that takes more force to compress. They are neither taller nor more firm.
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