Sprindex
Product Description
Sprindex Adjustable Downhill Coil Spring (490–560 lbs / 75mm Stroke)
Achieve the ultimate rear suspension setup without the hassle of swapping traditional coils. The Sprindex Downhill Coil Spring brings tool-free, micro-adjustable spring rate tuning to your coil shock, allowing you to fine-tune your sag, adapt to changing trail conditions, or stiffen your rate for long climbs. Engineered from super high-tensile spring steel and lightweight glass-reinforced polymer, Sprindex delivers custom coil performance in a lightweight package.
How Sprindex Works
Spring rate is determined by active coil length. By turning the Sprindex dial, the system alters the number of active coils available for deflection—adjusting your spring rate without changing coil length or affecting your preload setting. The selected spring rate is clearly displayed through the window on the dial, giving you precise control over your suspension's performance.
Progressive End-Stroke Support
While traditional coils are strictly linear, Sprindex features a progressive spring rate through the final 20% of its stroke (80–100%). This provides supple small-bump traction and plushness through the initial travel, combined with ramped-up bottom-out resistance for big hits, heavy drops, and linear frame linkages.
Key Features
- Tool-Free Adjustment: Easily turn the dial to adjust spring rate anywhere between 490 lbs/in and 560 lbs/in.
- Super High-Tensile Steel: Stronger and lighter than standard coil springs, reducing overall coil mass while handling high stress.
- Low-Friction Delrin Adapters: Includes 5 performance adapters to ensure smooth fitment across a wide range of shock models while preventing coil-windup and preload ring self-adjustment.
- Independent Preload: Adjusting spring rate does not affect preload, ensuring your sag is always achieved through proper rate rather than excessive preloading.
Specifications
- Spring Rate Range: 490–560 lbs/in (micro-adjustable)
- Stroke: 75 mm
- Length (without adapters): 160 mm
- Weight: 563 g
- Material: Super high-tensile steel coil, glass-reinforced polymer dial assembly, Delrin adapters
- Compatibility: Fits most major coil shock brands using included adapters (RockShox performance washer included)
Shipping Policy
We pay shipping on orders over $150 to Nationwide addresses, excluding Rural addresses and some Bulky items.
Orders under $150 cost $7.99
Rural order fee $4.99
Aerosol and Dangerous Goods fee $9.99
For a specific delivery ETA based on the exact item(s) you want to purchase, please call us at 0800 793 593 or message us via Chat before placing an order.
We understand that when you make an order, you want your parts as quickly as possible and we will do our best to make that happen! Most of the items we sell will ship quickly and be at your door fast. If urgent freight is required, we work closely with our vendors in order to have the product shipped directly to you from their warehouse if that means you will get the product faster.
Items will have an availability status shown once a size/color is selected on the product page; this availability status will also be shown on the shopping cart page and in your order confirmation email. Most products will be marked "In Stock". These products will ship within 1-2 business days.
While we will do our best to ship from the distribution center closest to you, not all items will always be in stock in every location at all times. In some cases we will split the order and ship each package out to you individually and in other cases we may need to consolidate the items in one location to ship out as one package. We utilize our best judgment in an attempt to get the products to you as quickly as possible.
A shipping confirmation email including courier specific tracking information will be sent the same day as the item ships.
RETURNS POLICY
Returns
Our policy lasts 90 days. If 90 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.
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
- 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)
- 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 90 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 sales@moto1.nz.
Sale items
Sale items can be returned under the same 90-day policy as regular-priced items.
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 sales@moto1.nz
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, please email us to receive instructions.
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.

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