Cascade Components 2021 Stumpjumper EVO Link Installation

Cascade Components
10 Feb 202112:30

TLDRIn this video, David from Catch Gate Components guides viewers through the installation process of the Cascade Components Stumpjumper Link on a 2021 Stumpjumper EVO. The process involves removing the rear wheel, loosening and removing various bolts and the shock, and then carefully taking out the stock link with its bearing spacers. After cleaning and greasing the hardware, the new link is assembled with greased bearing spacers and bolts, with blue Loctite recommended for personal use. The reinstallation includes putting the shock and yoke back on, torquing all bolts to specifications, and checking for clearances after reattaching the wheel. Finally, the shock is repressurized, and the sag is set to 30 percent. The video provides a clear and detailed walkthrough for bike enthusiasts looking to upgrade their suspension system.


  • 🔧 Tools needed include a 6mm, 5mm, and 4mm Allen wrench, a torque wrench with the respective bits, a shock pump, blue Loctite, and grease.
  • 🚴‍♂️ Remove the rear wheel to access the suspension link.
  • 🔩 Loosen and remove the necessary bolts to detach the suspension link, including the shock mount bolt.
  • ⚙️ Remove the shock and shock yoke to prevent scratching the paint during the installation process.
  • 🔨 Remove the seat stays from the yoke and set aside the hardware.
  • 🔍 Remove the stock link and carefully extract the bearing spacers, which are press fit into the bearings.
  • 🧼 Clean all hardware parts and ensure the rubber seals are correctly seated on the main pivot bolts.
  • 🛠️ Apply a thin layer of grease to all parts that will contact the bearings.
  • 📦 Install the greased bearing spacers into the rear two pivot locations of the new link.
  • 🔨 Apply grease and blue Loctite to the bolts that will secure the link to the bike.
  • 🔩 Reinstall the main pivot bolts and seat stay pivots, ensuring they are snugged up but not fully torqued yet.
  • 💡 Torque all bolts to the specifications provided by the manufacturer, which can be found on their website.
  • 🚵‍♀️ After installation, check for clearances by deflating the shock and compressing the suspension, ensuring there is no interference.

Q & A

  • What is the main topic of the video?

    -The main topic of the video is the installation of a Cascade Components Stumpjumper Link on a 2021 Stumpjumper EVO bike.

  • What tools are required for the installation process?

    -The required tools include a six millimeter Allen wrench, a five millimeter Allen wrench, a four millimeter Allen wrench, a torque wrench with six and five millimeter Allen wrench bits, a shock pump, blue Loctite, and grease.

  • Why is the back wheel removed at the beginning of the installation?

    -The back wheel is removed to get it out of the way for easier access to the components that need to be disassembled and reassembled during the installation process.

  • What is the purpose of using blue Loctite on the bolts?

    -Blue Loctite is used on the threads of the bolts to help prevent them from loosening over time due to vibration and use.

  • How should the bearing spacers be removed from the bike?

    -The bearing spacers can be removed by using pliers or an Allen wrench to push them out from the small gap between the two bearing spacers.

  • Why is it important to apply grease to the bearing spacers?

    -Applying grease to the bearing spacers helps to ensure a smooth installation process and reduces friction between the spacers and the bearings.

  • What should be done with the rubber seal on the main pivot bolts?

    -The rubber seal should be reset into the groove on the bolts, ensuring it is flush and in a straight line all the way around.

  • How should the link be installed on the bike?

    -The link should be slid back over the frame, with the front bearing spacers held in place by grease. The main pivot bolts are then threaded in and snugged down, followed by the seat stay pivots.

  • What is the final step in the installation process?

    -The final step is to torque down all the bolts to the specifications using a torque wrench, and then to put the wheel back on the bike and check for clearances.

  • How can viewers find more information about the product or installation process?

    -Viewers can find more information by visiting the Cascade Components website at

  • What should be done to set the sag on the shock after the installation?

    -After the installation, the shock should be connected to a shock pump and aired up, or if it's a coil shock, the spring should be reinstalled, and then the sag should be set to 30 percent.

  • Why is it necessary to check for clearances after the installation?

    -Checking for clearances is necessary to ensure that there is adequate space between the components and the frame, preventing any potential damage or interference during use.



🔧 Preparing for Link Installation

David begins by listing the tools required for installing the stump jumper link on a 2021 stumpjumper evo, including various sizes of allen wrenches, a torque wrench, a shock pump, blue loctite, and grease. He then demonstrates the initial steps of the installation process, which involve removing the back wheel and loosening specific bolts on the bike. David also shows how to safely remove the shock and shock yoke, ensuring not to scratch the paint. Finally, he details the removal of the stock link and bearing spacers, emphasizing the importance of keeping track of all hardware and components.


🛠️ Link Installation and Hardware Preparation

After cleaning and resetting the rubber seals on the bolts, David proceeds with the installation of the new link. He instructs on applying a thin layer of grease to all bearing contact points and demonstrates how to reinstall the bearing spacers into the link. Special attention is given to applying grease and blue loctite on the bolts, as recommended by the bike manufacturer. The paragraph concludes with the step-by-step process of installing the link onto the bike, including the placement of the front bearing spacers and the main pivot bolts, followed by the seat stay pivots and the reattachment of the shock and shock yoke.


🔩 Final Assembly and Checks

David emphasizes the importance of using a torque wrench to ensure that all bolts are tightened to the correct specifications, which can be found on the manufacturer's website. He then guides through the process of reassembling the bike by putting the wheel back on and checking for clearances after deflating the shock. For coil shocks, he advises leaving the bottom bumper and lower spring retainer in place while removing the spring for clearance checks. Finally, he covers the steps to reinflate the shock or reinstall the spring and set the sag to 30 percent before concluding the installation process. He invites viewers to visit their website for further inquiries.



💡Stumpjumper EVO

The Stumpjumper EVO is a model of mountain bike produced by the company Specialized. In the video, it is the bike on which the installation of a new component, the Stumpjumper Link, is being performed. This is central to the video's theme as the entire process revolves around modifying and enhancing this specific bike model.

💡Stumpjumper Link

The Stumpjumper Link is a component that is being installed on the Stumpjumper EVO bike. It is a part that likely alters the bike's suspension characteristics. The installation process of this link is the primary focus of the video, making it a key concept for viewers interested in bike modification.

💡Allen Wrench

An Allen wrench, also known as a hex key, is a tool used for driving bolts and screws with a hexagonal socket. In the context of the video, various sizes of Allen wrenches are required to loosen and tighten bolts during the installation process of the Stumpjumper Link, highlighting its importance as a tool for bicycle maintenance.

💡Torque Wrench

A torque wrench is a tool used to tighten or loosen bolts to a precise torque, which is critical for ensuring safety and proper function in mechanical assemblies. In the video, a torque wrench is used to ensure that all bolts are tightened to the correct specifications, which is a crucial step in the installation process.

💡Blue Loctite

Blue Loctite is a type of threadlocker, a substance applied to fasteners to prevent them from loosening due to vibrations. In the video, it is recommended to apply blue Loctite to the threads of certain bolts during the installation, which is an important step to ensure the longevity and stability of the bike's components.


Grease is a lubricant used to reduce friction between moving parts. In the context of the video, grease is applied to various parts that will contact the bearings during the installation of the Stumpjumper Link, which is essential for the smooth operation and longevity of the bike's moving components.

💡Shock Pump

A shock pump is a device used to adjust the air pressure in a bicycle's suspension system. In the video, the shock pump is used to adjust the bike's shock after the installation of the Stumpjumper Link, which is a critical step to ensure the bike's suspension operates correctly.


Suspension refers to the system of springs, shock absorbers, and linkages in a vehicle that connects the wheels to the frame, allowing movement and absorbing shocks. In the video, the suspension is a key focus as the Stumpjumper Link is a part of this system, and its installation affects the bike's handling and performance.

💡Bearing Spacers

Bearing spacers are components that are placed between bearings to maintain proper spacing and alignment. In the video, bearing spacers are removed from the stock link and then reinstalled in the new Stumpjumper Link, which is an important step in ensuring the correct functioning of the bike's pivot points.


Clearances refer to the space between moving parts of a mechanical system, ensuring there is no interference. In the video, after the installation, the presenter checks for clearances to make sure there is adequate space around the link and other components, which is essential for the safe and proper operation of the bike.

💡Sag Setting

Sag setting is the process of adjusting the suspension's compression to achieve a specific amount of deflection or 'sag' under the rider's weight. In the video, setting the sag to 30 percent is the final step after the installation of the Stumpjumper Link, which is important for tuning the bike's suspension to the rider's preferences and weight.


Installing a Stumpjumper Link on the 2021 Stumpjumper EVO requires specific tools including a 6mm, 5mm, and 4mm Allen wrench, a torque wrench, a shock pump, blue Loctite, and grease.

The back wheel must be removed to facilitate the installation process.

Loosening and removing specific bolts is necessary to prepare the bike for the new link installation.

The shock and shock yoke can be removed to prevent scratches on the bike's paint during the process.

The stock link's bearing spacers are press-fit and can be challenging to remove, potentially requiring pliers or an Allen wrench.

All eight bearing spacers are identical, allowing for flexibility in their reinstallation.

Old grease should be cleaned off the hardware before reinstallation.

Rubber seals on the main pivot bolts should be checked and reset into their grooves to ensure a proper seal.

A thin layer of grease is applied to all parts that will touch the bearings.

Bearing spacers for the front two bearings require a dab of grease on the narrow side for easier installation.

Specialized recommends using blue Loctite on the threads of the bolts for added security.

The link is installed by sliding it over the frame and securing it with the main pivot bolts.

Seat stay pivots are installed over the link with the hardware pushed through.

The shock and shock yoke are reattached to the bike with care to avoid causing scratches.

All bolts should be snugged up before final torquing to specification found on the Specialized Service Center website.

After torquing, the wheel is reinstalled, and the shock is deflated to check for adequate clearances at full bottom out.

The final step involves airing up the shock or reinstalling the spring and setting the sag to 30 percent.

Cascade Components provides support and information on their website for any questions regarding the installation or their products.