JETSTREAM EMA-4Y386-CB2430 Twist Fit Bottom Bracket Installation Guide

Ensure that the internal cable routing of the frame will not interfere with the bottom bracket (BB) installation.
Clean the inside of the BB shell on the frame, ensuring it is smooth and free of debris.

Apply a thin layer of grease to the inner edges of the BB shell to assist with smooth BB installation.

Installation Steps

Non-Drive Side Installation:

Gently position the non-drive side BB along with the non-drive side Snug Ring into the non-drive side of the BB shell.
Using a dedicated BB installation tool, press the non-drive side BB into the BB shell of the frame until there is no gap between the BB and the frame.

Ensure proper vertical alignment and check for any resistance during pressing.

Drive Side Installation:

Remove the Snug Ring from the drive-side BB and press it into the drive-side of the frame’s BB shell.
Align the drive-side BB vertically with the inside of the drive-side BB shell on the frame, and rotate it counterclockwise to insert.

Use a BB wrench to fit the drive-side BB shell, rotating counterclockwise to press it in. Tighten to 30Nm torque value.

Bearing Maintenance:

Carefully pry off the outer seals from the bearings using a small tool.
Clean the bearings thoroughly with a suitable solvent, removing old lubricant and debris.

Allow the bearings to dry completely without damaging the seals or bearings.

Lubrication:

Use TRiPEAK ETERNA LV Fluid or appropriate lubricant to add a full lap of bearings.
Rotate the bearings gently by hand to ensure even distribution of lubricant.

Specification Check

Before installation, please ensure that your bike frame and crankset meet the following specifications.

Bike Frame: BB386

Twist-Fit Type

Inner Diameter: 46mm
Width: 86mm

Crank Spec:

Shimano HT II: 024mm√

SRAM DUB: 028.99mm√
ROTOR 3D+ : 030mm√

BB BB386 Anatomy

Before installation, please ensure that the purchased BB meets the following specifications and includes the following contents.

General Safety

To install Tthe RiPEAK Bottom Bracket, we strongly recommend that you have a trained bicycle mechanic at your local bike shop.
Do not alter this product in any way as it can cause unseen damage. Any modifications to this product will void the warranty.
Make sure the crankset is firmly attached to the bottom bracket, Improperly attached cranks can become detached from the BB set.
When cleaning the bottom bracket set, only use mild soap and water. Never use a high-pressure water jet, It will cause BB cup internal water ingress and influence the bearing rolling lifetime.
If you have any questions or concerns about this product, Please feel free to contact us. E-mail: info@tripeakbearing.com

Required Tools

TRIPEAK Tool Required: B015

Tool compatible with a torque wrench for installation use

Bottom Bracket Installation

Use the included TRiPEAK ETERNA LV Fluid to Add a full lap of bearings. Rotate the bearings gently by hand to ensure the lubricant is evenly distributed. Carefully press the seals back into place on the bearings, ensuring they are seated properly and securely. After reassembly, check to ensure the bearings move smoothly and without resistance.
Ensure that the internal cable routing of the frame will not interfere with the bottom bracket (BB) installation. Clean the inside of the BB shell on the frame, ensuring it is smooth and free of debris. Apply a thin layer of grease to the inner edges of the BB shell to assist with smooth BB installation.
Remove the drive-side BB, which will be installed later.
Gently position the non-drive side BB along with the non-drive side Snug Ring into the non-drive side of the BB shell. Using a dedicated BB installation tool, press the non-drive side BB into the BB shell of the frame until there is no gap between the BB and the frame. During pressing, ensure the BB is inserted at a proper vertical angle to the frame. If you encounter excessive resistance while pressing, stop the process and recheck the insertion angle and the BB shell for any debris or deformation.

Remove the Snug Ring from the drive-side BB and first press it into the drive-side of the frame’s BB shell. Align the drive-side BB vertically with the inside of the drive-side BB shell on the frame, and rotate it counterclockwise to insert. Then, use the BB wrench (B015) to fit the drive-side BB shell, continuing to rotate counterclockwise to press it in. Tighten to a torque value of 30Nm, ensuring there is no gap between the BB and the frame’s BB shell, completing the BB installation. If the non-drive side BB rotates along with the drive-side BB during installation, prepare another BB wrench (B015) to secure the non-drive side BB in place, ensuring the required torque value is reached.

Installation of Crank’s Adapter

3-IN-1 CORE SYSTEM

Bottom Bracket Maintenance

For maintaining and servicing TRiPEAK bottom brackets, we strongly recommend hiring a trained bicycle mechanic at your local bike shop.
Regular maintenance is generally recommended after riding 5,000-10,000 km. If riding in harsh conditions (wet, dusty, extreme temperatures, etc.), it is advised to perform maintenance immediately after riding.

Avoid repeated disassembly and reassembly of the BB Cup unless necessary, as maintenance should only focus on the BB bearings to prevent damage to the frame.
Do not use high-pressure water jets to clean the BB to avoid water infiltration and bearing damage.
Regularly check the torque value of the BB Cup, and do not ride with a loose BB Cup.

Bearing specifications for BB386 BB.

Drive Side : 42 x 30 x 7mm (6806-2RS) Non-Drive Side : 42 x 30 x 7mm (6806-2RS)

Lubricant Recommendation
TRIPEAK ETERNA LV Fluid

Reapply lubricant to Bottom Bracket

Carefully use a small tool to gently pry off the out outer seals from the bearings. Use a suitable solvent to clean the bearings thoroughly, removing old lubricant and any debris. Allow them to dry completely.
Be cautious not to damage the seals or the bearings. Use TRiPEAK ETERNA LV Fluid or the appropriate lubricant to Add a full lap of bearings. Be sure to use the correct type of lubricant recommended for your specific bearings. Rotate the bearings gently by hand to ensure the lubricant is evenly distributed.

Carefully press the seals back into place on the bearings, ensuring they are seated properly and securely. After reassembly, check to ensure the bearings move smoothly and without resistance.

WWW.tripeakbearing.com

FAQ

Q: What torque value should be used for tightening the drive-side BB during installation?
A: The drive-side BB should be tightened to a torque value of 30Nm using a suitable BB wrench (B015).

Q: What lubricant is recommended for bearing maintenance?
A: TRiPEAK ETERNA LV Fluid or an appropriate lubricant should be used to lubricate the bearings after thorough cleaning.

Documents / Resources

JETSTREAM EMA-4Y386-CB2430 Twist Fit Bottom Bracket [pdf] Installation Guide
EMA-4Y386-CB2430 Twist Fit Bottom Bracket, EMA-4Y386-CB2430, Twist Fit Bottom Bracket, Bottom Bracket

References

User Manual

JETSTREAM EMA-4Y386-CB2430 Twist Fit Bottom Bracket

Specifications

Pre-Installation Preparation