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Ohlins STX22Air - User Manual

Ohlins STX22Air
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Shock absorber for Specialized Enduro, Stumpjumper and Rhyme
STX22Air
Owners Manual/ Mounting Instructions
Warning!
Before installing this product, read this manual. The
shock absorber is an important part of your bicycle and
will affect the stability.
Note!1
Please note that the images in this manual are a
general representation of the product and may differ
slightly from your product.
Note!1
Please note that during storage and transportation,
especially at high ambient temperature, some of the oil
and grease used for assembling may leak and stain the
packaging. This is in no way detrimental to the product,
wipe off the excessive oil/grease with a cloth.
Note!1
This manual refers to different bikes so pictures might
differ from the actual bike but procedure is the same.
Kit Contents
Description Part No Pcs
Shock absorber STX22Air 1
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Summary

Shock absorber for Specialized Enduro, Stumpjumper and Rhyme STX22 Air Owners Manual; Mounting Instructions

Kit Contents

Lists the included components with part numbers and quantities.

Important Installation Warning

Crucial safety warning emphasizing the importance of reading the manual before installation.

Product Representation Notes

Informs users that images are representative and may differ slightly from the actual product.

Storage and Leakage Advisory

Advises about potential oil leakage during storage and transportation due to temperature.

Procedural Consistency Note

Clarifies that procedures are the same even if pictures differ from specific bike models.

SAFETY PRECAUTIONS

Stability Impact Note

Reinforces the shock absorber's importance for bicycle stability.

Manual Comprehension Requirement

Stresses the importance of understanding the manual and related technical documents.

Manufacturer Liability Disclaimer

States Öhlins Racing AB's disclaimer regarding damage from improper installation or maintenance.

Post-Installation Test Ride Advisory

Advises a low-speed test ride after installation to ensure bicycle stability.

Immediate Action for Malfunctions

Instructs to stop riding and seek service if abnormal noise, irregular function, or leakage occurs.

Warranty Conditions and Support

Explains warranty conditions and advises contacting service centers for questions.

Bicycle Manual Consultation

Reminds users to always consult the bicycle manufacturer's manuals when working with the product.

Manual as Product Component

States that the manual is an integral part of the product and should accompany it.

Safety Symbols Explanation

Explains the meaning of safety symbols used throughout the manual.

Model-Specific Installation Warning

Product must be installed exclusively on the designated bicycle model.

Pressurized Air and Service Warning

Warns about pressurized air and the necessity of expert servicing and tools.

MOUNTING INSTRUCTIONS

Professional Installation Recommendation

Advises professional installation by an authorized service center for optimal results.

Frame Protection During Installation

Caution about holding the frame when removing the shock to prevent paint damage.

Pre-Installation Cleaning Advisory

Recommends cleaning the bicycle thoroughly before commencing installation.

Reference to Bicycle Service Manual

Advises referring to the bicycle service manual for specific procedures and data.

Tightening and Movement Caution

Ensures screws are tightened correctly and do not impede shock absorber movement.

SETTING SAG

Flat Surface Procedure Note

Procedure must be performed on a flat surface for accurate sag measurement.

Auto-Sag Setup Guide

Simplifies air pressure adjustment and automatically determines the correct amount of sag.

Manual Sag Setup Guide

Recommended Sag Values

Provides recommended sag measurements for different bike models.

Rider Weight to Air Pressure Chart

Guideline for initial air pressure settings based on rider weight.

General Sag Adjustment Recommendations

Advice on adjusting sag based on riding style and terrain.

ADJUSTERS

Compression Damping Adjuster Guide

Details how to adjust low and high-speed compression damping using colored adjusters.

High-Speed Damping Position Note

Explains the 'Additional platform control' setting for specific riding conditions.

Rebound Damping Adjuster Guide

Describes how to adjust rebound damping for optimal suspension response.

Rebound Adjuster Temperature Note

Notes on rebound adjuster compensation for temperature changes and recommended settings.

SETTING UP

Suspension Geometry and Interaction

Explains how suspension geometry affects stability and traction, requiring front/rear balance.

General Setup Process

Provides a method for adjusting settings through trial and error on varying terrain.

Adjustment Range and Usage

Discusses the full adjustment range of the STX shock and its suitability for riders.

Rebound Damping Tuning

Guides adjustments for loose, nervous, or harsh bike feel by increasing/decreasing rebound.

Low Speed Compression Damping Tuning

Controls chassis movement and affects bike stability and traction based on adjustments.

High Speed Compression Damping

Offers three positions for bump absorption and traction control, with position 2 as default.

SETUP DATA AND MAINTENANCE

Pre-Ride Setup Data Check

Emphasizes checking basic settings against setup data before riding for optimal performance.

Air Pressure Adjustment Cruciality

Highlights air pressure's role in finding the best setup, complementing sag and clicks.

Progressive Spring Characteristics Note

For progressive spring characteristics, users are advised to contact an authorized service center.

Regular Maintenance Schedule

Outlines essential maintenance tasks for the shock absorber and their recommended intervals.

Overview

This document describes the Öhlins STX22Air shock absorber, designed for Specialized Enduro, Stumpjumper, and Rhyme bicycles. It serves as an owner's manual and provides mounting instructions, safety precautions, and setup guidelines for optimal performance.

Function Description

The STX22Air is a high-performance shock absorber that controls the bicycle's suspension by managing energy absorption during compression (when hitting a bump) and extension (returning to its normal position). This control is crucial for maintaining stability, traction, and comfort while riding. The shock absorber is an air spring type, meaning its spring rate is determined by air pressure, which can be adjusted to suit rider weight and riding style.

The shock absorber features both compression and rebound damping adjusters. Compression damping regulates how easily the shock compresses, affecting how the bicycle handles bumps and impacts. Rebound damping controls how quickly the shock extends after compression, influencing how the bicycle recovers from bumps and maintains contact with the ground. These adjustments allow riders to fine-tune the suspension characteristics to match different terrains and personal preferences.

A key feature is the "auto-sag" setup, which simplifies the process of setting the correct sag (the amount the suspension compresses under the rider's weight). This system automatically determines the optimal sag by releasing air pressure until a balanced state is achieved. For riders who prefer more precise control, a manual sag setup is also provided, allowing for specific air pressure adjustments based on rider weight and desired sag values.

The shock absorber is designed to work in harmony with the bicycle's front fork, ensuring that both ends of the suspension system interact properly for balanced performance. Proper setup of the shock absorber is essential as it directly impacts the bicycle's ride height, fork angle, and overall handling.

Usage Features

The STX22Air shock absorber offers several features to enhance the riding experience:

  • Adjustable Sag: Riders can set the sag using either an auto-sag feature for quick and easy setup or a manual method for more precise control. Correct sag is vital for optimal suspension performance, affecting the bicycle's geometry and handling.
  • Compression Damping Adjusters:
    • Low-Speed Compression: This adjuster, typically blue, controls chassis movement and how the shock feels during slower compressions, such as when entering corners or encountering gentle bumps. Turning it clockwise increases damping (firmer feel), while counter-clockwise decreases it (softer feel).
    • High-Speed Compression: This adjuster, usually black, has three positions: soft, medium, and an additional platform control. Position 1 (soft) is for maximum bump absorption and traction. Position 2 (medium) is the recommended all-round setting. Position 3 (additional platform control) is designed for long climbs where traction needs are limited, providing a firmer platform to improve pedaling efficiency. Using position 3 for normal riding may lead to a loss of traction and bump absorption.
  • Rebound Damping Adjuster: This adjuster, typically gold and located at the end eye/bracket, controls the speed at which the shock extends after compression. Turning it clockwise increases damping (slower rebound), and counter-clockwise decreases it (faster rebound). Proper rebound setting prevents the bike from feeling "bouncy" or "packing down" over successive bumps.
  • Temperature Compensation: The rebound adjuster is designed to compensate for temperature changes, meaning the number of clicks may vary between cold and warm conditions. Recommended settings are typically for room temperature.
  • Wide Adjustment Range: The STX shock is designed for use across its full adjustment range, allowing riders to find their preferred settings, whether fully open or closed.

Maintenance Features

To ensure the longevity and optimal performance of the STX22Air shock absorber, the manual outlines several maintenance recommendations:

  • Regular Cleaning: After every ride, it is recommended to clean dirt and debris from the shock absorber. This prevents contaminants from entering seals and causing premature wear.
  • Air Pressure and Sag Check: Riders should check the air pressure and set the sag before every ride. Consistent sag ensures the suspension operates within its intended range and maintains proper bicycle geometry.
  • Mounting Bolt Torque Check: The torque of the shock absorber mounting bolts should be checked before every ride. This ensures secure attachment and prevents potential damage or failure during use.
  • Full Shock Absorber Air Spring Rebuild: A comprehensive air spring rebuild at a service center is recommended every 100 hours of riding or once a year, whichever comes first. This service involves replacing seals, fluids, and inspecting internal components to restore the shock to its original performance.
  • Professional Service: For any complex service, modification, or if the shock exhibits abnormal noise, irregular function, or leakage, it must be serviced by an MTB authorized Specialized service center. This ensures that specialized tools, knowledge, and genuine parts are used, preserving the product warranty and safety.
  • Product Warranty: The product warranty is valid only if the shock absorber has been operated and maintained according to the recommendations in the manual.
  • Handling and Storage: During storage and transportation, especially in high ambient temperatures, some oil and grease may leak. This is normal and not detrimental; any excess should be wiped off with a cloth.

Ohlins STX22Air Specifications

General IconGeneral
TypeRear Shock
Spring typeAir
Intended UseMountain bike
AdjustmentsRebound damping
Spring RateAir spring
Mounting OptionsStandard eyelet mounts
TravelVaries by model
Mount typeStandard eyelet
Eyelet sizeStandard
Shaft diameter8mm

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