Looks like you got Shock Therapy springs not Eibachs...

Polaris has been doing this for years.

 

Looks like you got Shock Therapy springs not Eibachs...

Polaris has been doing this for years.

It is my understanding Eibach supplies the springs for Shock Therapy , according to internet search .

 

Spring rates are different between Eibach, and springs made for ST. ST uses their own spring rates.
All Eibach's have their name on the springs, all springs made for ST have Shock Therapy written on them like the ones that you have.

 

All of the stock springs are garbage on any machine. I just go ahead and replace mine within the first 500 miles as it looses ride height by then.

 

I know they all seem to fail way too soon , but why ?

 

I have heard that the springs are soft so that they pass the rollover test. It could also just be a cost saving measure.

 

From ST website.

As for my experience. Had ST on my Pro XP4, rode good compared to stock springs but alot of body roll/dive/squat for my rig.

I've had Eibach on both the RZR's i've had and they ride great with enough support that there's not as much body roll. I don't ride with sway bars because I like articulation of the suspension with the terrain I ride.

 

Eibach- great for doing a spring only change without doing valving. With valving they are even better. Many other shock tuners(not ST) use Eibach spring packages and tune accordingly.

Shock Therapy- suck for a spring only change(really suck), but they work fine when you do the whole RIS (valving) from them.

So, IMO, if you are doing springs only, use Eibach's.
If you are doing a complete shock setup, you're good with any of the springs that the big dog(ST, MTS, etc.) shock tuners provide.

 

I would think spring rate is the same no matter who you use. 350lb is 350lbs and 14” is 14”. Now I do believe they all have their own witchery when it come to determining what spring rate you need but I don’t think the rates are different. if you order the same rate and size from either manufacturer they should be the same.

I’m talking quality springs, not some off brand garbage.

I could be wrong but I’ve done a ton of spring swaps and this has been my experience

It’s also pretty easy to get proper springs from any manufacturer as long as you have corner weights and shock lengths. Couple other variables but king has walked me through it a couple times.

 

I agree with @yamahoSHO on this statement: "The ST springs were soft, which road well, but it had a lot of lean/dive/squat." I've had a couple of customers replace ST with Zbroz for this reason. For those not running a front sway bar, the sway is pretty bad. I've been very pleased with the ZBroz kits. I installed the kit on my Turbo R at ~300 miles and it was a huge improvement. I now have around 2000 miles and have been very happy with the suspension performance. I also had their kit my Turbo S and loved them on that car too. I can also order Eibach and MTS offroad spring kits too if anyone wants to try one of their kits. Happy to help with a forum member price quote!

 

I'm one of those customers that Seth helped out and swapped from ST to ZBroz. I'm right there with my opinion on how the ST handled being the same as @yamahaSHO and @BurksRzRs. And I can't ever recall someone complaining about going with Eibach springs as a good choice like they did.

 

These threads always feel like an AA session. we've all been there and pissed off when we realized our springs collapsed and our ass was saggin. I had the same issue on my pro xp, made the same post.

for what it's worth, I will say I would agree that the ST springs ride like a dream, but they do allow a lot of lateral body roll.

 

Even if you don't buy springs from me, you can still use my install method. I did a write up here on how to install the front springs without removing the shocks.

PM, call text or email me for a price on Eibach, Zbroz or MTS Offroad spring kits.

 

🍿

 

What do failed springs look like?

 

It’s when you buy a 74” wide Pro R and your trailer is 77” wide , but after 650 miles the Rzr no longer fits in the trailer because the springs have collapsed and sagged so much , making the Rzr now 79” wide !

 

Some people will say when the upper springs (tenders) are fully collapsed like this pic but the main indicator is that you've lost 2" of ground clearance/ride height or more. You can try to adjust the preload collars to get the ride height back but in most people's experience, mine included, the ride quality will be worse than ever after doing that. You really can't appreciate just how crappy the stock Polaris springs perform until you experience the ride difference of a quality aftermarket spring kit. It's worth every penny.