Racertech Polaris RZR S Dual Rate Performance Spring Set


After over a year of testing all over the world we are ready to release our replacement springs kits for the 09'+ RZR S using Fox Podium Shocks. This is a dual rate kit which gives a substantial improvement in ride quality while improving handling as well at G-out resistance. We've found the perfect combination of spring length to rate ratio and are very happy with our results. This kit is for all four corners of the machine. It provides a short spring, a long spring and a delrin spacer for each shock. The delrin spacer has two different guide shoulder lengths designed into it to provide adjustability for the user to modify when the secondary spring kicks out and the system goes to a linear rate. The secret is in our short springs. We've found a perfect universal rate which allows us to custom tailor our long springs, (which determines the final rate of the suspension) to each individuals needs.

Why Dual Rates? - This is as good of a question as it is common. Dual Rates are essentially the same as any progressive spring in the sense that they do the same thing; they vary the final rate at different compression heights. The biggest difference for the end user is the adjustability gained by choosing the dual-rate. Our options are limitless with this setup and more variations are made up and applied every week to suit customer’s individual needs. With dual-rates we are able to "fine-tune" your ride in a way that was previously not possible. Another more technical reason why we at Racer Tech prefer dual-rate springs is they are able to reduce excessive rebound issues which are extremely inherent with the RZR's. The OEM believes in using light spring rates with unusually large amounts of preloads to achieve their desired ride height and ride. We believe in the more commonly accepted method of using properly matched springs with less preload. This allows the spring to work the way it's designed to better because we aren't so far into the compression. This reduces the spring tension which in-turn reduces the requirement for stronger rebound dampening, which in-turn causes less work for the shock, which in-turn causes less friction for the fluids, which in-turn extends the time it takes for the fluid to overheat which of course is the catalyst in the equation that makes shocks "fade". This is very good for the potential customer who doesn't really ride aggressively enough, or often, to justify spending the big money on a set of aftermarket shocks. By creating a lower initial spring rate when both springs are active there is a much lower resistance energy which is what ends up giving the RZR it's "bucking" effect.

Some may say we have created an unorthodox dual rate spring system here and they would be right. We believe there’s more than one way to go about things as do most people. The truth is, we’ve developed a theory after years of knowledge and experience combined which works very well for this specific application. We’ve found a new combination of spring rates and a new way of applying them to achieve a better ride and better handling than anything else currently on the market. There are people who have tried other alternative springs out there who are coming to use for a better solution and now we are proud to say we have it.


We have narrowed it down to three options; Light, Medium and Heavy. Originally there were two but we’ve moved the options around a little to better suit our customers.

Light – This spring set will give you about the same initial ride feel as stock with improved bottom-out resistance and handling characteristics. This set will not necessarily “lift” the machine so don’t get this option if you are looking for more height. We have also found this set does not work very well in combination with our lift kit. This is a great kit for major improvements over stock by fixing what you don’t like but keeping all the things you do like.

Medium - The medium rate set is a perfect improvement over stock for recreational drivers without very much extra weigh added to the vehicle. The medium rate is perfect for the aggressive driver, intermediate racer or for a vehicle with some extra weight in accessories or passengers. Of all the options this seems to be the most popular and seems to work the best with our Racer Tech Lift Kit.

Heavy - The Heavy option if for the drivers who are carrying more than the usual amount of payload on or in their machines. Heavy roll cages, bumpers, winches, tools and gear all weigh the machine down and if you feel like your machine needs just a little more spring to hold it up than the other guys then this option is for you. This kit when combined with a Racer Tech lift kit will make for a very stiff ride. We recommend the customer considers this before ordering this combination.

Of course because we can make all the adjustments with one spring per shock, we are able to sell individual long springs to people looking to "tune" there springs sets in to their specific liking. We will list the three standard packages which will cover about 90% of all users. If you would like to discuss a custom combination feel free to call and an engineer can help you find what you need. Please note; This kit WILL NOT WORK ON A RZR 4. Racer Tech is currently developing a kit for the RZR 4 which requires larger diameter hardware and springs. We will be releasing these as soon as they are ready to ship.

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  • Model: RZR-COKIT-S-FOX
  • Manufactured by: Racer Tech

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