But with bigger rims. How long have you had them and about how long before you need to change. Basically, how long can the shocks last you with these springs.

 

I have had the Z H-techs on for some 8k miles with no effect on the sport tuned shocks. The rear spring rate of the Z H-Techs are a bit lighter than the stock ones. If your car came with the 19" OEM rims you have the sports tuned suspension package and should be just fine.

I am running 255/35/19 x 9.5 and 285/35/19 x 10.5 and have experienced no ill effects with regard to the stock shocks. They should last just as long as if you were running the stock springs.

In short time, I will be either swapping out the rear Z H-Techs for the Z S-Techs mated with Tokico D-spec 9's or simply go with coilovers. Even then the Z S-Techs are still a bit lighter in rear spring rate than the stock rear springs.

 

Does the reduced travel effect shock life? And if so, the spring mount mod would probably worsen the situation.

 

Now over 2 years with 20s