Originally Posted by daggo66
All soft tops begining with 2010 have it.
Double check that, I'm not sure it's accurate.
Premium top was introduced in 2012, not sure if 2012 premium had spring assist or not.
The 2012 standard sunrider did NOT have the spring assist.
Both standard sunrider and premium sunrider from 2013 on have spring assist.
So none prior to 2012 had spring assist, the 2012 premium might have had it, and both standard and premium tops since and including 2013 have it.