Funn CROSSFIRE - User Manual

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CROSSFIRE STEM 2022.09.01 / REV. 0

INSTALLATION AND USE

Thank you for purchasing the FUNN CROSSFIRE STEM.

Please read these instructions thoroughly before attempting to install this item.

Following all ﬁtting instructions in order is required for compliance with FUNN’s warranty policy.

2 to 3mm gap from

top of stem

to top of steerer tube.

CROSSFIRE STEM

． Torque wrench

． Crossﬁre stem 1 PC

contents

Steerer tube preparation

stem installation

． Crossﬁre stem requires a 28.6mm (1 1/8”) steerer tube.

． Ensure the steerer tube is the correct length – there should be 2-3mm gap from the top of the spacer or stem

to the top of the steerer tube. If the steerer tube requires modifying to ﬁt, ensure it is cut level..

． Hex key 4mm

tools required

Remove all bolts. Grease the threads and under the heads.

Ensure the external surface of the steerer tube is both

clean and dry. Slide the stem onto the steerer, depending

on the rise or drop required.

Fit the top cap and tighten the headset pre-load bolt to

remove any play while keeping the steering smoothly.

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Summary

Steerer Tube Preparation

Steerer Tube Length and Gap

Ensure steerer tube is correct length with a 2-3mm gap from the top of the spacer or stem to the steerer tube.

Stem Installation Steps

Initial Bolt Preparation

Remove all bolts and grease threads and under the heads before proceeding with installation.

Steerer Tube and Stem Mounting

Clean and dry the steerer tube, then slide the stem onto it, adjusting for desired rise or drop.

Headset Pre-load Adjustment

Fit the top cap and tighten the headset pre-load bolt to remove play while ensuring smooth steering.

Handlebar Clamp Tightening

Install handlebar, position clamps with 'No Gap' markings up, tighten top bolts to 6Nm.

Lower Clamp and Steerer Clamp Tightening

Tighten lower clamp bolts to 6Nm and steerer clamp bolts to 6Nm after aligning stem to wheel.

Important Safety Warning

Regular Checks and Damage Inspection

Check bolt torque twice yearly and inspect stem/handlebar for cracks. Stop use if damaged.

The FUNN CROSSFIRE STEM is a bicycle component designed for connecting the handlebars to the steerer tube of a bicycle's fork. Its primary function is to provide a secure and stable interface for steering, allowing the rider to control the direction of the bicycle. The stem is engineered to ensure a precise fit and reliable performance, contributing to the overall safety and handling of the bike.

Usage Features:

The installation process of the CROSSFIRE STEM is detailed to ensure correct and safe assembly. Before beginning, users are advised to thoroughly read the provided instructions to comply with FUNN's warranty policy and ensure proper functionality.

The stem is compatible with a 28.6mm (1 1/8”) steerer tube. A critical step in preparation involves ensuring the steerer tube is the correct length, with a recommended 2-3mm gap between the top of the spacer or stem and the top of the steerer tube. If the steerer tube needs to be modified, it must be cut level to ensure a flush and secure fit.

Installation begins by removing all bolts and applying grease to their threads and under their heads. It is crucial to ensure the external surface of the steerer tube is both clean and dry before sliding the stem onto the steerer. The stem can be oriented to achieve the desired rise or drop for handlebar positioning.

After the stem is in place, the top cap is fitted, and the headset pre-load bolt is tightened. This step is essential for removing any play in the headset while ensuring that the steering remains smooth and unobstructed.

Next, the handlebars are installed. The clamps are designed with "No Gap" markings, which should be positioned at the top. The handlebars are adjusted to the rider's preferred position, and then the top clamp bolts are tightened to 6Nm, ensuring no gaps remain at the top of the clamps. Subsequently, both lower clamp bolts are tightened to 6Nm or to the torque recommended by the handlebar manufacturer, if different.

Finally, the steerer clamp bolts are inserted. The stem must be carefully aligned with the front wheel before these bolts are tightened to 6Nm. It is explicitly stated that the stem bolts must be tightened before riding, as a loose stem can lead to serious accidents.

Maintenance Features:

Regular maintenance is crucial for the longevity and safety of the CROSSFIRE STEM. Users are advised to check the torque for all bolts twice a year. This periodic check helps ensure that all components remain securely fastened and prevents any loosening that could compromise safety or performance.

In addition to torque checks, a thorough inspection of the stem and handlebar for any signs of damage or visible cracks is recommended. This visual inspection helps identify potential issues early on. If any damage is detected, the part should be immediately stopped from use and replaced. Failure to do so could result in serious injury, highlighting the importance of adhering to these maintenance guidelines.

The design and installation instructions emphasize precision and attention to detail, ensuring that the CROSSFIRE STEM provides a robust and reliable connection for the bicycle's steering system. By following the installation and maintenance procedures, riders can ensure the safe and effective operation of their bicycle.