SPRINDEX ALLOWS FOR TOOL-FREE, EASY ADJUSTMENT OF YOUR COIL'S SPRING RATE.
Adjusting 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.
No 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.
Spring 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.
Follow 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.
Your Sprindex coil behaves like a regular coil that has a spring rate the same as your adjusted Sprindex spring rate. 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.
HOW DOES SPRINDEX ADJUST SPRING RATE?
The 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.
COIL SHOCKS VERSUS AIR SHOCKS
Most agree that coil shocks outperform air shocks, assuming the right spring rate for the particular rider. Air shocks have significant "stiction" which is friction that resists the shock's initial movement. Coil shocks have much less stiction. Coil shocks soak up small bumps much better, better tire contact with the ground, give better traction, better ride quality, and make a rider measurably faster. So why are air shocks more common? The answer is lack of adjustability for coils and weight. Traditional coils have a fixed spring rate and spring rate has a dramatic effect on riding performance and feel. Most people ride the wrong spring rate because springs are typically only available in wide increments. Spring rate has a profound effect on bike performance. Coil shocks also weigh more than air shocks, but when using the right spring rate, the small weight penalty is easily worth it. Besides, Sprindex is lighter than ordinary shock springs.
SPRING RATE IS DIFFERENT FROM PRELOAD
Coil shocks include a threaded ring for preloading the coil. However, preloading is not the same as using a stiffer (higher spring rate) spring.
Sprindex
Preload
A sprindex coil behaves exactly like a regular coil of the selected spring rate. For example, Sprindex adjusted to 435 lb/in behaves just like a custom made 435 lb/in standard coil.
Improper SAG. SAG must be achieved by spring rate, not preload.
Mountain bike shocks are designed for as little preload as is necessary to take play out of the system. Any more preload than this harms ride performance.
SPRINDEX IS PROGRESSIVE
Besides having an adjustable spring rate, Sprindex is also progressive. Sprindex is specifically designed to have a progressive spring rate for the last 20% of stroke for big hit support and for bikes with a linear linkage design.
Coil versus Air: A coil is usually very linear, whereas an air shock starts out Regressive (a reducing spring rate), and then turns progressive (an increasing spring rate). See the chart below. One of the disadvantages to using an Air shock is that its regressiveness mean less small bump sensitivity and traction. This is partly why Air shocks are not as plush as Coil.
Regardless of your bike's suspension design, Sprindex being linear between about 0-80% stroke and progressive between about 80% and 100% stroke works great because it provides unbeatable sensitivity and traction through all the small and medium movement and it provides progressive support for big hits. Most importantly, Sprindex also provides spring rate adjustment in order to fine tune the perfect spring rate so that you maximize your suspension performance.
Performance Adapters
Performance Adapters are included. Sprindex coils fit a wide variety of shocks, but you must use the Performance Adapters for most of them. Our Performance Adapters both improve the fit between the coil and your shock and are made of low friction Delrin to improve shock performance by allowing the spring to twist during high deflection. Also, the Performance Adapters help prevent the preload ring from self-adjusting due to coil windup. See bottom of Performance Adapter for instruction of which Performance Adapter you should use. For Rockshox, no Performance Adapter is required but we recommend you use the Performance Washer adapter for shock performance and to help prevent preload self-adjustment.
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Refund Policy
Returns Our policy lasts 7 days. If 7 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All returns will incur a 15% restocking fee if not specified otherwise.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Several types of goods are exempt from being returned. Perishable goods such as food, flowers, newspapers or magazines cannot be returned. We also do not accept products that are intimate or sanitary goods, hazardous materials, or flammable liquids or gases.
Additional non-returnable items: - Gift cards - Downloadable software products - Any Electrical products - Some health and personal care items
To complete your return, we require a receipt or proof of purchase. Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable) - Book with obvious signs of use - CD, DVD, VHS tape, software, video game, cassette tape, or vinyl record that has been opened - Any item not in its original condition, is damaged or missing parts for reasons not due to our error - Any item that is returned more than 7 days after delivery
Refunds (if applicable) Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund. If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
Late or missing refunds (if applicable) If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at manager@nelsonmotorcycles.co.nz.
Sale items (if applicable) Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Exchanges (if applicable) We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at manager@nelsonmotorcycles.co.nz and send your item to: 67 Saint Vincent Street, NSN, Nelson 7010, New Zealand.
Gifts If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be mailed to you.
If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a refund to the gift giver and he will find out about your return.
Shipping To return your product, you should mail your product to: 67 Saint Vincent Street, NSN, Nelson 7010, New Zealand. Only mail your product once you have notified Nelson Motorcycles and they have accepted the return.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you, may vary.
If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.