{"product_id":"sprindex-trail-55mm-220-spring-1","title":"Sprindex Trail 55mm \/ 2.20\" spring","description":"\u003ch2\u003eSprindex allows for tool-free, easy adjustment of your coil's spring rate.\u003c\/h2\u003e\n\u003cp\u003eAdjusting your shock's spring rate can profoundly improve your bike's handling and suspension. In fact, you may find yourself using different spring rates for different trails, depending on the conditions and type of trail. Or you may increase your spring rate for long climbs and decrease it for down hills. \u003c\/p\u003e\n\u003cp\u003eNo expense was spared on the materials or manufacturing processed used. The coil itself is made of super high tensile spring steel similar to \"lightweight\" springs (which is why Sprindex is lighter than regular springs) in order to handle the stress of the system when adjusted to its highest spring rate setting, as well as reduce coil mass. The Sprindex assembly is made of glass reinforced polymer. The 5 included adapters are made of slippery Delrin.\u003c\/p\u003e\n\u003cp\u003eSpring rate is the force required to move a spring a given distance and independent of preload. For example, a \"400 lb\/in\" spring requires 400 pounds to move the spring 1 inch and 800 pounds to move a spring 2 inches. Preload is how much force is required to start moving the spring. Sprindex is patent pending in many countries.\u003c\/p\u003e\n\u003cp\u003eFollow your shock manufacturer's instructions for preload amount and sag and other shock adjustments. Do not preload your Sprindex more than 3 turns and 1 to 2 turns is preferred. Adjusting your Sprindex does not change the length of the coil and so does not change your preload. Preload is adjusted normally and with the threaded ring that came with your shock.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does sprindex adjust spring rate?\u003c\/strong\u003e\u003cbr\u003eThe spring rate of a spring is the amount of force it takes to deflect the spring a certain distance (typically pounds per inch or Newtons per mm). Spring rate is a function of 4 characteristics:  wire diameter, coil diameter, material, and number of active coils. More active coils causes a lower spring rate and fewer active coils causes a higher spring rate. Think of it like this:  the less wire there is to bend, the stiffer the spring. By twisting the Dial, Sprindex works by altering the number of active coils available for deflection. The adjusted spring rate is displayed through a window in the Dial.\u003c\/p\u003e\n\u003ch2\u003e\n\u003cbr\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAdjustable base spring rate with a progressive finish. \n\u003c\/li\u003e\n\u003cli\u003eIncludes spring, adjuster, and 5 performance adapters. \n\u003c\/li\u003e\n\u003cli\u003eLightweight (highest grade steel allows less material). \n\u003c\/li\u003e\n\u003cli\u003e55mm \/ 2.2\" stroke. \n\u003c\/li\u003e\n\u003cli\u003e126mm spring length.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCheck \u003ca href=\"https:\/\/sprindex.com\/pages\/compatibility\" target=\"_blank\"\u003e\u003cstrong\u003eHERE\u003c\/strong\u003e \u003c\/a\u003efor compatibility with your rear shock.\u003c\/p\u003e\u003ciframe width=\"489\" height=\"275\" src=\"https:\/\/www.youtube.com\/embed\/ws0BKQud0yw\" title=\"Fox, DVO, Cane Creek, X-fusion, Ohlins, etc installation\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen\u003e\u003c\/iframe\u003e\n\n\u003ciframe width=\"489\" height=\"275\" src=\"https:\/\/www.youtube.com\/embed\/pWD-0fEdgkE\" title=\"sprindex adjustment\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen\u003e\u003c\/iframe\u003e\n\n\u003ciframe width=\"1000\" height=\"550\" src=\"https:\/\/www.youtube.com\/embed\/ZWD_l9TkwLY\" title=\"Sprindex\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen\u003e\u003c\/iframe\u003e","brand":"Sprindex","offers":[{"title":"430-500 lbs\/in","offer_id":48058475512049,"sku":"SX-24500","price":166.72,"currency_code":"AUD","in_stock":true},{"title":"490-560 lbs\/in","offer_id":48058475544817,"sku":"SX-24560","price":166.72,"currency_code":"AUD","in_stock":true},{"title":"550-610 lbs\/in","offer_id":48058475577585,"sku":"SX-24610","price":166.72,"currency_code":"AUD","in_stock":true},{"title":"610-690 lbs\/in","offer_id":48058475610353,"sku":"SX-24690","price":166.72,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1580\/4145\/files\/zm_20231114-031406.png?v=1776533950","url":"https:\/\/novasportsbikes.com\/products\/sprindex-trail-55mm-220-spring-1","provider":"Nova Sports Bikes","version":"1.0","type":"link"}