EASTON CYCLING EA90 AX Dropper Seatpost Owner’s Manual

June 6, 2024
EASTON CYCLING

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EASTON CYCLING EA90 AX Dropper Seatpost

EASTON CYCLING EA90 AX Dropper Seatpost

OPERATION

WARNING

Use the EA90 AX seatpost in a safe, controlled environment BEFORE using it during rides in order to fully understand how the seatpost functions. A sudden, unexpected impact from the saddle could cause you to lose control of your bicycle, resulting in SERIOUS INJURY OR DEATH.

  •  The EA90 AX seatpost has two positions for saddle height. Press and hold the lever as you change the position.
  • Use your body to press the saddle down as you change to the lower saddle height setting and to guide your saddle as it returns to the higher setting.
  • Once the seatpost is in one of the two positions, release the remote lever. Always release the remote lever first before releasing the pressure on the saddle with your body.
  • Practice within your abilities to gain expertise in using the EA90 AX seatpost before using it in more technical riding situations.

WARNING AND SAFETY INFORMATION

  • FOX products should be installed by a qualified bicycle service technician, in accordance with FOX installation specifications. If you have any doubts as to whether or not you can properly install the EA90 AX adjustable height seatpost on your bicycle, defer to a professionally trained bicycle service technician. Improperly installed products can fail, causing the rider to lose control, resulting in SERIOUS INJURY OR DEATH.
    Regardless of bicycle frame tube configuration, the best structural support is achieved when the EA90 AX seatpost is inserted at least to 1) the minimum insertion mark on the seatpost, AND 2) the minimum insertion point specified by the manufacturer of your bicycle frame. Neglecting these two items risks causing damage to the frame and seatpost, resulting in SERIOUS INJURY OR DEATH.

  • Make sure that the EA90 AX remote lever does not interfere with normal brake and shift lever operation. Failure to do so can result in loss of control, resulting in SERIOUS INJURY OR DEATH.

  • Make sure that the bottom cap of the EA90 AX seatpost never touches any part of the frame, or the rear shock through the entire range of shock travel. Make sure that no part of the internal actuation mechanism at the base of the seatpost contacts any internal seat tube parts such as frame pivots or bottom bracket parts. Failure to do this risks causing damage to the frame and seatpost, resulting in SERIOUS INJURY OR DEATH.

  • Make sure your seatpost is the correct outer diameter to fit your bicycle seat tube inner diameter. Using the incorrect size of the EA90 AX seatpost on your bicycle can lead to product damage, personal injury, or both.

  • Make sure the cable housing does not interfere with the swingarm linkage, rear tire, clothing and riding gear, and steering clearance. Never attach the cable housing to any part of your rear shock.

  • The anodized surface of the upper seatpost, like a rear shock body, serves as a sealing surface. Always take every precaution to avoid causing abrasion damage to the anodized surface of the upper seatpost. The upper portion of the EA90 AX seatpost may be carefully clamped in a workstand.

  • The maximum torque for the EA90 AX seatpost collar binder bolt is 5.1 N•m (45 In-lb). Actual required torque will depend on rider weight, bike frame, and type/brand of seatpost/seat collar. Correct torque will support the rider and not interfere with seatpost function. If the torque is too high, the seatpost may not return fully from all positions or may not move up and down properly. If the torque is too low, the seatpost may not support the weight of the rider or may not remain stationary at the seat tube. Failure to use the proper torque for your seatpost/seat collar combination can result in loss of control, resulting in SERIOUS INJURY OR DEATH.

INSTALLATION

A. 1X REMOTE LEVER INSTALLATION (22.2 CLAMP)

  1. Install the remote lever clamp onto the handlebar in the desired location. Test the range of motion for each remote, brake, and shifter control lever to make sure there is proper clearance between them.
  2. Insert the bolt through both sides of the clamp. Then use a 4 mm hex wrench to turn the bolt clockwise and tighten to 17.7 in-lb (2.0 Nm).
    Less torque may be needed for carbon bars. Refer to the handlebar manufacturer’s instructions for use with carbon bars.

EASTON CYCLING EA90 AX Dropper Seatpost fig 1

B. 2X/3X REMOTE LEVER INSTALLATION (22.2 CLAMP)

  1.  Install the remote lever clamp onto the handlebar in the desired location. Test the range of motion for each remote, brake, and shifter control lever to make sure there is proper clearance between them.
  2. Insert the bolt into the clamp as shown. Then use a 2.5 mm hex wrench to turn the bolt clockwise and tighten to 15 in-lb (1.7 Nm). Less torque may be needed for carbon bars. Refer to the handlebar manufacturer’s instructions for use with carbon bars.

EASTON CYCLING EA90 AX Dropper Seatpost fig 2

C. 1X REMOTE LEVER INSTALLATION (COMPATIBLE WITH MATCHMAKER INTERFACE)

  1.  Install and position the brake lever according to the brake manufacturer’s instructions.
  2. Install the remote lever onto the brake lever clamp using the adapter and mounting bolt supplied by the brake manufacturer. Tighten to 17.7 in-lb (2.0 Nm). Test the range of motion for each remote, brake, and shifter control lever to make sure there is proper clearance between them. NOTE: Only one of the bolt holes will be utilized during installation, according to your setup needs.

EASTON CYCLING EA90 AX Dropper Seatpost fig 3  D. 1X REMOTE LEVER INSTALLATION (I-SPEC EV)

  1. Install and position the brake lever according to the brake manufacturer’s instructions. Make sure to install the supplied nut into the band clamp of the brake lever during this step.
  2.  Install the remote lever and adapter to the brake lever clamp using the supplied mounting bolts. Tighten both bolts to 17.7 in-lb (2.0 Nm). Test the range of motion for each remote, brake, and shifter control lever to make sure there is proper clearance between them. EASTON CYCLING EA90 AX Dropper Seatpost fig 4 E. DROP-BAR REMOTE LEVER INSTALLATION (24.0 CLAMP)
  3. Install the remote lever clamp onto the handlebar in the desired location. Test the range of motion for each remote, brake, and shifter control lever to make sure there is proper clearance between them.
  4. Then use a 2.5 mm hex wrench to turn the bolt clockwise and tighten to 9 in-lb (1.0 Nm). Less torque may be needed for carbon bars. Refer to the handlebar manufacturer’s instructions for use with carbon bars.

EASTON CYCLING EA90 AX Dropper Seatpost fig 5

STANDARD INTERNAL CABLE ROUTING
This procedure covers most seatpost and remote lever combinations, which begin with installing the cable at the seatpost end. Contact your dealer to help you understand which instructions apply to your specific product combinations.

  1. Route the cable housing from the remote lever into the internal routing port of the frame. Push the housing through the frame until the housing emerges from the seat tube and extends approximately 2 in (50 mm) beyond the seat collar. Make sure to allow enough slack for proper steering clearance.

  2. Install a ferrule on the seatpost end of the cable housing. Install a ferrule onto the cable housing at the remote lever end.

  3. Install the end cap into the bottom of the seatpost (see image 1) until the o- ring seats into the groove inside the seatpost. The end cap should be flush with the end of the seatpost.

  4. Starting from the seatpost end, lightly lubricate the cable and install it through the cutout in the side of the seatpost and into the cable hanger.

  5. Check that the cable head is centered in the cable hanger (see the arrow in image 2). Route the cable beneath the cable clamp bolt and tighten to 2.8 Nm (25 in-lb).

  6.  Route the cable through the end cap and into the cable housing.

  7.  Insert the seatpost into the seat tube while pulling the cable from the remote lever (use friction paste for carbon frames if needed). Install the seatpost 20 mm (.79 in) into the frame and temporarily tighten the seatpost collar binder bolt just enough to hold the post in place.
    WARNING
    The EA90 AX seatposts are directional and proper orientation can be identified by laser etching “Rear of Post.”

  8. Install the cable into the barrel adjuster of the lever until it exits past the clamp bolt. Ensure the barrel adjuster is turned to the middle of its range. Pull the cable tight to seat each end of the housing.

  9. Hold the lever in the fully extended position while tightening the clamp bolt to the correct torque value shown for your lever (see image 3). Make sure there is a small amount of cable slack and some “free play” at the lever when the seatpost is in all positions.

  10. Press the lever down completely 5-10 times. Use the barrel adjuster to fine-tune the cable tension. If there is too much cable slack, loosen the lever clamp bolt, pull the cable, and reclamp the bolt to the proper torque (see image 3).

  11. Check that the seatpost properly moves into all positions.

  12. Set the seatpost to the desired height and tighten the seat collar binder bolt to a maximum of 5.1 N•m (45 In-lb). Check again that the seatpost properly moves into all positions.
    WARNING
    The maximum torque for the EA90 AX seatpost collar binder bolt is 5.1 N•m (45
    In-lb). Actual required torque will depend on rider weight, bike frame, and type/brand of seatpost/seat collar. Correct torque will support the rider and not interfere with seatpost function. If the torque is too high, the seatpost may not return fully from all positions or may not move up and down properly. If the torque is too low, the seatpost may not support the weight of the rider or may not remain stationary at the seat tube. Failure to use the proper torque for your seatpost/seat collar combination can result in loss of control, resulting in SERIOUS INJURY OR DEATH.

  13. Make sure to leave approximately 0.8 in (20 mm) of cable length visible at
    the remote end. Cut the cable to the correct length and install the end crimp. Tuck the end of the cable into the recess in the underside of the lever (not applicable for drop-bar lever).

EASTON CYCLING EA90 AX Dropper Seatpost fig 6 EASTON CYCLING EA90 AX Dropper Seatpost fig
7 EASTON CYCLING EA90 AX Dropper Seatpost
fig 8 EASTON CYCLING EA90 AX Dropper Seatpost
fig 9 EASTON CYCLING EA90 AX Dropper Seatpost
fig 10 EASTON CYCLING EA90 AX Dropper
Seatpost fig 11

INTERNAL CABLE ROUTING FOR COMPATIBLE LEVERS
This procedure is intended to supplement the manufacturer’s instructions for compatible remote levers, such as Shimano GRX, which begin with installing
the cable at the remote end. Contact your dealer to help you understand which instructions apply to your specific product combinations.

  1.  Install the remote lever, cable housing, and cable according to your remote lever manufacturer’s instructions. Make sure to install a ferrule to the seatpost end of the cable housing.
  2. Make sure to leave 25-30 mm (0.9-1.2 in) of cable length past the end cap (see image 4). Install the end cap into the bottom of the post until the o-ring seats into the groove inside the seatpost. The end cap should be flush with the end of the seatpost.
  3. Install the seatpost 20 mm (.79 in) into the frame and temporarily tighten the seatpost collar binder bolt just enough to hold the post in place.
  4. Use pliers to access the cable through the cutout in the side of the seatpost. Route the cable beneath the post cable clamp bolt and use the pliers to pull any remaining slack in the cable. Tighten the post cable clamp bolt to 2.8 Nm (25 in-lb), making sure there is a small amount of cable slack and some “free play” at the lever when the seatpost is in all positions.
  5.  Press the lever down completely 5-10 times. Use the barrel adjuster to fine-tune the cable tension. If there is too much cable slack, loosen the post clamp bolt, pull the cable, and reclamp to the proper torque..
  6. Check that the seatpost properly moves into all positions.
  7. Set the seatpost to the desired height and tighten the seat collar binder bolt to a maximum of 5.1 Nm (45 In-lb). Check again that the seatpost properly moves into all positions.

WARNING
The maximum torque for the EA90 AX seatpost collar binder bolt is 5.1 Nm (45 In-lb). If the torque is too high, the seatpost may not return fully from all positions or may not move up and down properly. If the torque is too low, the seatpost may not support the weight of the rider or may not remain stationary at the seat tube. Failure

WARRANTY

Easton Cycling is a FOX Factory, Inc. owned brand. Fox Factory, Inc., a California corporation having offices at 130 Hangar Way, Watsonville, CA 95076 (“Fox”), makes the following LIMITED WARRANTY with respect to its suspension products:

FOX LIMITED WARRANTY
LIMITED ONE (1) YEAR WARRANTY ON SUSPENSION PRODUCTS
Subject to the limitations, terms and conditions hereof, Fox warrants, to the original retail owner (consumer) of each new Fox suspension product, that the Fox suspension product, when new, is free from defects in materials and workmanship. This limited warranty expires one (1) year from the date of the original Fox suspension product retail purchase from an authorized Fox dealer or from a Fox authorized Original Equipment Manufacturer where Fox suspension is included as original equipment on a purchased vehicle.

TERMS OF WARRANTY
This limited warranty is conditioned on the Fox suspension product being operated under normal conditions and properly maintained as specified by Fox. This limited warranty is only applicable to Fox suspension purchased new from an authorized Fox source and is made only to the original retail owner (consumer) of the new Fox suspension product and is not transferable to subsequent owners.
Should it be determined, by Fox in its sole and final discretion, that a Fox suspension product is covered by this limited warranty, it will be repaired or replaced, by a comparable model, at Fox’s sole option, which will be conclusive and binding.

THIS IS THE EXCLUSIVE REMEDY UNDER THIS LIMITED WARRANTY. ANY AND ALL OTHER REMEDIES AND DAMAGES THAT MAY OTHERWISE BE APPLICABLE UNDER THIS LIMITED WARRANTY ARE EXCLUDED, INCLUDING, BUT NOT LIMITED TO, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR PUNITIVE DAMAGES.

This limited warranty does not apply to normal wear and tear, malfunctions or failures that result from abuse, neglect, improper assembly, alteration or modification, improper or unauthorized repair or maintenance, crash, accident or collision, or other abnormal, excessive or improper use.
This limited warranty gives the consumer specific legal rights.
The consumer may also have other legal rights under the applicable national laws which are not affected by this limited warranty. If it is determined by a court of competent jurisdiction that a certain provision of this limited warranty does not apply, such determination shall not affect any other provision of this limited warranty and all other provisions shall remain in effect.

THIS IS THE ONLY WARRANTY MADE BY FOX ON ITS SUSPENSION PRODUCTS AND COMPONENTS, AND THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION HEREIN. ANY WARRANTIES THAT MAY OTHERWISE BE IMPLIED BY LAW INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXCLUDED.

This limited warranty shall be governed exclusively by the laws of the State of California.
When making a claim under this Limited Warranty you will be required to provide to an authorized Fox Service Center:

  1. The Product (or the affected part) and
  2.  A copy of the original proof of purchase, which clearly indicates the name and address of the seller, the date and place of purchase, the product part number and if utilized, a serial number. If Fox products are sold as part of a complete bicycle, the bicycle brand, model, model year, and serial number should be included.

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