Installation Instructions

Read this entire installation manual prior to installing and using your Sprindex coil. Be sure that the Sprindex stroke is at least as long as your shock rating. It is okay if your shock stroke is less than the Sprindex stroke maximum.

Above: Installation on shocks such as Fox, DVO, X-Fusion, Cane Creek, and Ohlins require 2 Performance Adapters (included). Determine which of the included Performance Adapters to use (shock brands are identified on back of Performance Adapters).

Above: Installation on shocks such as Rockshox do not require any Performance Adapter but we recommend using the Performance Washer Adapter (included).

Coil Direction

The Sprindex coil can be installed in either direction and should be installed in the direction that provides the best adjusting access. If your entire shock has good access, then install the Sprindex with the Dial away from the piggyback for easiest hand access.

Direction 1 okay

Direction 2 okay

Sprindex coil can be installed in either direction. Direction 1 provides better access to adjusting the spring rate but sometimes direction 2 is preferred depending on the bike frame design, which could hide part of your shock.

Performance Adapters

Sprindex coils fit a wide variety of shocks, but you must use the included 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 direction of which adapter you should use. For Rockshox, no Performance Adapter is necessary but we recommend you use the Performance Washer for improved shock function.

5 size Performance Adapters are included to fit a wide variety of shocks.

For most shocks such as Fox, DVO, Cane Creek, and X-Fusion, use one Performance Adapter at each end. Use the Performance Adapter that best centers the coil on the shock at both ends (takes out the most play).

For Rockshox, Performance Adapters are not necessary but we recommend using the included Performance Washer Adapter on the preload ring end to provide a low friction surface for improved shock performance and to increase the coil length if necessary.

Installing Sprindex

Follow your shock maker's instructions for changing coil spring which are typically:

Remove your shock from your frame.
Loosen the preload adjuster until the spring moves freely.
Lift up the coil spring and remove the slotted spring retainer and the spring retainer insert (if any).
Slide the coil spring off the shock body. Depending on your bike model, you may need to remove the shaft eyelet hardware to create enough clearance to remove the coil spring.
Determine which direction (1 or 2) the Sprindex coil should be installed on your shock body that will provide you the best access within your bike frame for twisting the Dial to adjust your spring rate.
Add Performance Adapters or Performance Washer Adapter to your Sprindex depending on shock model.
Slide Sprindex with Performance Adapters or Performance Washer Adapter onto the shock body.
Install slotted spring retainer back on the shock with its recessed side toward the shaft eyelet and its protruding section going into the inside of the Performance Adapter or Performance Washer Adapter.
Tighten the preload adjuster just until the spring no longer moves. Then turn the preload adjuster per your shock manufacturer's recommendation (typically 1 to 2 turns). In any event, do not preload your Sprindex more than 3 turns.
Check sag and shock setup as detailed per your shock's instructions. Sprindex recommends as a starting point to achieve the recommended sag by adjusting your spring rate rather than adjusting your preload.
Lower spring rate increases sag. Higher spring rate decreases sag.

Adjusting Spring Rate

To adjust the spring rate, hold the coil with one hand and twist the Dial with your other hand or vice versa. The spring rate value is identified by the printed number on the coil displayed through the Dial opening (for example, 370 lb/in in the picture above). You can even adjust the spring rate at different points of your ride depending on the trail or conditions. Preload is not a substitute for a spring that is too weak.

Shock Adjustments

After installation, all shock adjustments including preload, sag, and other settings based on your shock maker's recommendations. However, remember that the sag setting is really only a predictor of proper shock setup and that obtaining near full shock travel during your ride is what is most important. So after setting up your sag, which is a good starting point, go ride and then adjust your Sprindex as needed to obtain near full shock travel on whatever is the most extreme area of your ride, without regard for sag percentage. Remember to further stiffen your Sprindex for any trails that will likely cause even more shock travel.

For your first ride, position the rubber shock bumper so that you can see how much travel your shock reaches and adjust your spring rate accordingly. Periodically check the travel of your shock and adjust your spring rate as necessary to provide you your ideal ride.

Before You Ride

Make sure that your shock is ready to ride

Clean the outside of your shock with mild soap and water and wipe dry with a soft rag.
- Do not use any solvents or de-greasers as these products can damage the shock's exterior finish.
- Do not use a high pressure washer or spray water directly at the seal/shock body junction.
Inspect the exterior of your shock. The shock should not be used if any of the exterior parts appear to be damaged
- Contact your local bike shop or your shock brand directly for further inspection or repair.
Make sure that your quick-release levers (or thru-axles) are properly adjusted and tightened.
Check your headset adjustment. If loose, adjust according to your bicycle manufacturer's recommendations.
Check that all brake cables or hoses are properly fastened.
Test the proper operation of your front and rear brakes on level ground.
Adjust your Sprindex to provide the sag that is recommended by your shock or bike brand. This is a good starting point.
Do not ride any extreme trails until you have had a chance to adjust your Sprindex to an optimal level for you. If your Sprindex cannot be adjusted to your optimal level, you should replace it with a Sprindex that has a spring rate range better suited to you and your bike.

WARNING: Check for clearance before riding. If you are installing your shock on a bike for which the shock was not original equipment, follow the steps below to ensure proper clearance before riding.

Remove the coil spring from your shock.

Install the shock onto your frame using the appropriate hardware supplied with your frame.
Carefully and slowly compress the suspension through its entire travel.
Check that no part of your shock contacts any portion of your frame or linkage as it cycles through its travel.
Remove the shock from your frame, reinstall the Sprindex, and reinstall your shock. Check that the spring does not contact any portion of your frame or linkage.
Set sag as described in your shock brand's instructions except adjusting your spring rate will also affect sag.

WARNING: Rear shock setup and configuration varies greatly between different bicycle manufacturers. Be sure to refer to the owner's manual for your bicycle. Sprindex products should be installed by a qualified bicycle service technician. Improperly installed shocks can fail, causing the rider to lose control, resulting in SERIOUS INJURY OR DEATH.

WARNING: All shock mounting hardware will have some inherent level of axial float which is required to achieve smooth performance. This is normal and is not a safety or performance concern. If your shock mounting hardware exhibits what you believe to be excessive float or makes noise, please contact your shock brand for assistance. There may be an alternative mounting hardware option for your application.

WARNING: Unless your shock brand advises differently, tighten the preload adjuster just until the spring no longer moves, then preload no more than 2 full turns. Preloading the spring more than 2 full turns may cause the spring to coil bind when the shock is bottomed out. This can cause damage to the shock which could lead to a loss of control resulting in SERIOUS INJURY OR DEATH.

WARNING: Shocks should be serviced by a qualified bicycle service technician. If you have any doubt whether or not you can properly service your shock, then DO NOT attempt it. Improperly serviced products can fail, causing the rider to lose control resulting in SERIOUS INJURY OR DEATH.

WARNING: Whether too stiff or too soft, the wrong spring rate can cause your shock to perform poorly, causing the rider to lose control resulting SERIOUS INJURY OR DEATH. Adjust your shock per your shock brand's recommendations.

Sprindex is compatible with a wide variety of shocks.

There are three different Sprindex lengths and strokes available, and each Sprindex coil can be adjusted through a certain spring rate range. Be sure to use the correct included adapter as described. Make sure that the spring length fits on your shock and that your maximum shock travel is not more than the specified Sprindex coil travel.

IF YOUR SHOCK IS NOT LISTED IN THE BELOW COMPATIBILITY TABLE:

Determine what your shock's stroke is and then compare that to the available Sprindex coils. Sometimes, you can find the stroke specification on the website of your bike brand for your bike model. The stroke printed on your existing coil is a clue, but it might have more stroke than your shock actually needs. Or, just measure the stroke per the picture above. Ideally, choose the Sprindex coil that has at least the amount of stroke that your shock requires, and then measure whether that Sprindex coil overall length can fit between your shock's flanges. The Sprindex coil lengths are listed in the below compatibility table. Note that most shocks can only achieve about 5mm less than their listed stroke because the bottom-out bumper can only be compressed so far, so in most cases it is okay if the Sprindex coil has up to about 3mm less stroke than your shock's stroke rating.

Find your shock on the below table and note which Sprindex family you need.

Shock Brand/Model	Regular or Trunnion	Shock eye to eye	Stroke	Metric / English	Sprindex spring family (stroke x length)
Fox DHX2		230 mm	60 mm	metric	65 x142
Fox DHX2		230 mm	65 mm	metric	65 x 142
Fox DHX2	Trunnion	205mm	60mm	metric	65 x 142
Fox DHX2	Trunnion	205mm	65mm	metric	65 x 142
Fox DHX2		8.5 inch	2.5 inch	English	65 x 142
Fox DHX2		8.75 inch	2.75 inch	English	65 x 142
Fox DHX2		7.875 inch	2.0 inch	English	55 x 126
Fox DHX2		7.875 inch	2.25 inch	English	55 x 126
Fox DHX2		210 mm	50mm	metric	55 x 126
Fox DHX2		210 mm	52mm	metric	55 x 126
Fox DHX2		210 mm	55mm	metric	55 x 126
Fox DHX2	Trunnion	185mm	55mm	metric	55 x 126
Fox DHX2		9.5 inch	3 inch	English	75 x 162
Fox DHX2 Fox DHX2	Trunnion	250mm 225mm	75mm 75mm	metric metric	75 x 162 75 x 162
Shock Brand/Model	Regular or Trunnion	Shock eye to eye	Stroke	Metric / English	Sprindex spring family (stroke x length)
MRP Hazzard		230 mm	65 mm	metric	65 x 142
MRP Hazzard		230 mm	60 mm	metric	65 x 142
MRP Hazzard		230 mm	57.5 mm	metric	65 x 142
MRP Hazzard	Trunnion	205 mm	65 mm	metric	65 x 142
MRP Hazzard	Trunnion	205 mm	60 mm	metric	65 x 142
MRP Hazzard	Trunnion	205 mm	57.5 mm	metric	65 x 142
MRP Hazzard		200mm	51mm	metric	55 x 126
MRP Hazzard		200mm	57mm	metric	55 x 126
MRP Hazzard		210mm	50mm	metric	55 x 126
MRP Hazzard		210mm	55mm	metric	55 x 126
MRP Hazzard		9.5 inch	3 inch	English	55 x 126
Shock Brand/Model	Regular or Trunnion	Shock eye to eye	Stroke	Metric / English	Sprindex spring family (stroke x length)
Marzocchi 2019 Bomber CR		230 mm	60 mm	metric	65 x 142
Marzocchi 2019 Bomber CR		230 mm	65 mm	metric	65 x 142
Marzocchi 2019 Bomber CR	Trunnion	205 mm	60 mm	metric	65 x 142
Marzocchi 2019 Bomber CR	Trunnion	205 mm	65 mm	metric	65 x 142
Marzocchi 2019 Bomber CR		7.875 inch	2.0 inch	English	55 x 126
Marzocchi 2019 Bomber CR		7.875 inch	2.25 inch	English	55 x 126
Marzocchi 2019 Bomber CR		210mm	50mm	metric	55 x 126
Marzocchi 2019 Bomber CR		210mm	55mm	metric	55 x 126
Marzocchi 2019 Bomber CR	Trunnion	185mm	52.5mm	metric	55 x 126
Marzocchi 2019 Bomber CR	Trunnion	185mm	55	metric	55 x 126
Marzocchi 2019 Bomber CR		250mm	75mm	metric	75 x 162
Shock Brand/Model	Regular or Trunnion	Shock eye to eye	Stroke	Metric / English	Sprindex spring family (stroke x length)
DVO Jade Coil		230 mm	65 mm	metric	65 x 142
DVO Jade Coil		230 mm	62.5 mm	metric	65 x 142
DVO Jade Coil		230 mm	60 mm	metric	65 x 142
DVO Jade Coil		230 mm	57.5 mm	metric	65 x 142
DVO Jade Coil	Trunnion	205 mm	65 mm	metric	65 x 142
DVO Jade Coil	Trunnion	205 mm	62.5 mm	metric	65 x 142
DVO Jade Coil	Trunnion	205 mm	60 mm	metric	65 x 142
DVO Jade Coil	Trunnion	205 mm	57.5 mm	metric	65 x 142
DVO Jade Coil		210mm	50mm	metric	55 x 126
DVO Jade Coil		210mm	52.5mm	metric	55 x 126
DVO Jade Coil		210mm	55mm	metric	55 x 126
DVO Jade Coil	Trunnion	185	50	metric	55 x 126
DVO Jade Coil	Trunnion	185	52.5	metric	55 x 126
DVO Jade Coil	Trunnion	185	55	metric	55 x 126
DVO Jade Coil		250 mm	70 mm	metric	75 x 160
DVO Jade Coil		250 mm	75 mm	metric	75 x 162
DVO Jade Coil	Trunnion	225mm	70mm	metric	75 x 162
DVO Jade Coil	Trunnion	225mm	75mm	metric	75 x 162
Shock Brand/Model	Regular or Trunnion	Shock eye to eye	Stroke	Metric / English	Sprindex spring family (stroke x length)
X-Fusion Vector Coil HLR		222 mm /8.75 in	69 mm	Metric/English	65 x 142
X-Fusion Vector Coil HLR		200mm	57mm	metric	55 x 126
X-Fusion Vector Coil HLR		240mm	76mm	metric	75 x 160
Shock Brand/Model	Regular or Trunnion	Shock eye to eye	Stroke	Metric / English	Sprindex spring family (length x stroke)
Cane Creek DB coil CS		222 mm	63 mm	Metric	65 x 142
Cane Creek DB coil CS		222 mm	66 mm	Metric	65 x 142
Cane Creek DB coil CS	Trunnion	205mm	57.5mm	Metric	65 x 142
Cane Creek DB coil CS	Trunnion	205mm	60mm	Metric	65 x 142
Cane Creek DB coil CS	Trunnion	205mm	65mm	Metric	65 x 142
Cane Creek DB coil CS		230mm	57.5mm	Metric	65 x 142
Cane Creek DB coil CS		230mm	60mm	Metric	65 x 142
Cane Creek DB coil CS		230mm	65mm	Metric	65 x 142
Cane Creek DB coil CS		210mm	50mm	metric	55 x 126
Cane Creek DB coil CS		210mm	52.5mm	metric	55 x 126
Cane Creek DB coil CS		210mm	55mm	metric	55 x 126
Cane Creek DB coil CS		200mm	50mm	metric	55 x 126
Cane Creek DB coil CS		200mm	57mm	metric	55 x 126
Cane Creek DB coil CS	Trunnion	185mm	50mm	metric	55 x 126
Cane Creek DB coil CS	Trunnion	185mm	52.5mm	metric	55 x 126
Cane Creek DB coil CS	Trunnion	185mm	55mm	metric	55 x 126
Cane Creek DB coil CS		250mm	70mm	metric	75 x 162
Cane Creek DB coil CS		250mm	75mm	metric	75 x 162
Cane Creek DB coil CS	Trunnion	225mm	70mm	metric	75 x 162
Cane Creek DB coil CS	Trunnion	225mm	75mm	metric	75 x 162
Cane Creek DB coil IL		210mm	50mm	metric	55 x 126
Cane Creek DB coil IL		210mm	52.5mm	metric	55 x 126
Cane Creek DB coil IL		210mm	55mm	metric	55 x 126
Cane Creek DB coil IL		200mm	50mm	metric	55 x 126
Cane Creek DB coil IL		200mm	57mm	metric	55 x 126

Marzocchi before 2018, some models					65 x 142
Shock Brand/Model	Regular or Trunnion	Shock eye to eye	Stroke	Metric / English	Sprindex spring family (length x stroke)
Ohlins TTX22 coil		230mm	57.5mm	Metric	65 x 142
Ohlins TTX22 coil		230mm	60mm	Metric	65 x 142
Ohlins TTX22 coil		230mm	65mm	Metric	65 x 142
Ohlins TTX22 coil	Trunnion	205mm	65mm	Metric	65 x 142
Ohlins TTX22 coil		210mm	50mm	metric	55 x 126
Ohlins TTX22 coil	Trunnion	185mm	55mm	metric	55 x 126
Ohlins TTX22 coil		7.87 inch	2.0 inch	English	55 x 126
Ohlins TTX22 coil		7.87 inch	2.25 inch	English	55 x 126
Ohlins TTX22 coil		9.5 inch	3.0 inch	English	75 x 162
Ohlins TTX22 coil	Trunnion	225mm	70mm	metric	75 x 162
Ohlins TTX22 coil	Trunnion	225mm	75mm	metric	75 x 162
Shock Brand/Model	Regular or Trunnion	Shock eye to eye	Stroke	Metric / English	Sprindex spring family (stroke x length)
Rockshox Super Deluxe Coil RCT		230mm	60mm	metric	65 x 142
Rockshox Super Deluxe Coil RCT		230mm	65mm	metric	65 x 142
Rockshox Super Deluxe Coil RC World Cup		230mm	60mm	metric	65 x 142
Rockshox Super Deluxe Coil RT Remote		230mm	60mm	metric	65 x 142
Rockshox Super Deluxe Coil RT Remote		230mm	65mm	metric	65 x 142
Rockshox Super Deluxe Coil R		230mm	60mm	metric	65 x 142
Rockshox Super Deluxe Coil R		230mm	65mm	metric	65 x 142
Rockshox Super Deluxe Coil RCT	Trunnion	205mm	57.5mm	metric	65 x 142
Rockshox Super Deluxe Coil RCT	Trunnion	205mm	60mm	metric	65 x 142
Rockshox Super Deluxe Coil RCT	Trunnion	205mm	65mm	metric	65 x 142
Rockshox Super Deluxe Coil RCT		210mm	55mm	metric	55 x 126
Rockshox Super Deluxe Coil RT Remote		200mm	57mm	metric	55 x 126
Rockshox Super Deluxe Coil RC World Cup		250mm	75mm	metric	75 x 162
Rockshox Super Deluxe RC	Trunnion	225mm	70mm	metric	75 x 162
Rockshox Super Deluxe RC	Trunnion	225mm	75mm	metric	75 x 162

Shock Brand/Model	Regular or Trunnion	Shock eye to eye	Stroke	Metric / English	Sprindex spring family (stroke x length)
Rockshox Vivid		200	57		55 x 126
Rockshox Vivid		216	63		65 x 142
Rockshox Vivid		222	70		65 x 142
Rockshox Vivid		240	76		75 x 162

Push			2.25 inch	English	55 x 126
Push			2.5 inch	English	65 x 142

Extreme Racing
EXT STORIA LOK V3		200	57	English	55 x 126
EXT STORIA LOK V3		217	63.5	English	65 x 142
EXT STORIA LOK V3		222	67	English	65 x 142
EXT STORIA LOK V3		210	50	Metric	55 x 126
EXT STORIA LOK V3		210	52.5	Metric	55 x 126
EXT STORIA LOK V3		210	55	Metric	55 x 126
EXT STORIA LOK V3		230	57.5	Metric	65 x 142
EXT STORIA LOK V3		230	60	Metric	65 x 142
EXT STORIA LOK V3		230	62.5	Metric	65 x 142
EXT STORIA LOK V3		230	65	Metric	65 x 142
EXT STORIA LOK V3		250	67.5	Metric	75 x 162
EXT STORIA LOK V3		250	70	Metric	75 x 162
EXT STORIA LOK V3		250	72.5	Metric	75 x 162
EXT STORIA LOK V3		250	75	Metric	75 x 162
EXT STORIA LOK V3	Trunnion	185	50	Metric	55 x 126
EXT STORIA LOK V3	Trunnion	185	52.5	Metric	55 x 126
EXT STORIA LOK V3	Trunnion	185	55	Metric	55 x 126
EXT STORIA LOK V3	Trunnion	205	57.5	Metric	65 x 142
EXT STORIA LOK V3	Trunnion	205	60	Metric	65 x 142
EXT STORIA LOK V3	Trunnion	205	62.5	Metric	65 x 142
EXT STORIA LOK V3	Trunnion	205	65	Metric	65 x 142
EXT STORIA LOK V3	Trunnion	225	67.5	Metric	75 x 162
EXT STORIA LOK V3	Trunnion	225	70	Metric	75 x 162
EXT STORIA LOK V3	Trunnion	225	72.5	Metric	75 x 162
EXT STORIA LOK V3	Trunnion	225	75	Metric	75 x 162
EXT STORIA LOK		200	57	English	55 x 126
EXT STORIA LOK		217	63.5	English	65 x 142
EXT STORIA LOK		210	50	Metric	55 x 126
EXT STORIA LOK		210	55	Metric	55 x 126
EXT STORIA LOK		230	60	Metric	65 x 142
EXT STORIA LOK		230	65	Metric	65 x 142
DH Racing:
EXT ARMA HBC V3		222	67	Metric	65 x 142
EXT ARMA HBC V3		241	74	Metric	75 x 162
EXT ARMA HBC V3		230	57.5	Metric	65 x 142
EXT ARMA HBC V3		230	60	Metric	65 x 142
EXT ARMA HBC V3		230	62.5	Metric	65 x 142
EXT ARMA HBC V3		230	65	Metric	65 x 142
EXT ARMA HBC V3		250	70	Metric	75 x 162
EXT ARMA HBC V3		250	72.5	Metric	75 x 162
EXT ARMA HBC V3		250	75	Metric	75 x 162
EXT ARMA HBC V3	Trunnion	205	57.5	Metric	65 x 142
EXT ARMA HBC V3	Trunnion	205	60	Metric	65 x 142
EXT ARMA HBC V3	Trunnion	205	62.5	Metric	65 x 142
EXT ARMA HBC V3	Trunnion	205	65	Metric	65 x 142
EXT ARMA HBC V3	Trunnion	225	70	Metric	75 x 162
EXT ARMA HBC V3	Trunnion	225	72.5	Metric	75 x 162
EXT ARMA HBC V3	Trunnion	225	75	Metric	75 x 162
EXT ARMA HBC		222	70	Metric	75 x 162
EXT ARMA HBC		241	76	Metric	75 x 162

PERFORMANCE ADAPTERS

Performance Adapters are included. Sprindex coils fit a wide variety of shocks, but you must use the Performance Adapter 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. See bottom of Performance Adapter for direction of which adapter you should use. For Rockshox, no adapter is necessary but we recommend you use the Performance Washer Adapter for shock performance.

COIL DIRECTION

ADJUSTING SPRING RATE

Metric Spring Rate Conversion

Spring rate is shown in pounds per inch (lb/in) on Sprindex coils. Below is a conversion from lb/in to N/mm.

Lb/in	350	360	370	380	390	400	410	420	430	440	450
N/mm	61	63	65	67	68	70	72	74	75	77	79

Lb/in	460	470	480	490	500	510	520	530	540	550	560
N/mm	81	82	84	86	88	89	91	93	95	96	98

Before installation make sure that your Sprindex coil is compatible with your shock.