Funn FUNNDURO - User Manual

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FUNNDURO STEM 2022.09.10 / REV. 0

INSTALLATION AND USE

Thank you for purchasing the FUNN FUNNDURO 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.

FUNNDURO STEM

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.

． Torque wrench

． Funnduro Stem 1 PC

contents

Steerer tube preparation

stem installation

． Funnduro 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

2 to 3mm gap from

top of stem

to top of steerer tube.

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Summary

Stem Installation

Remove and Grease Bolts

Remove and grease all stem bolts and their heads before installation.

Clean and Mount Stem

Ensure steerer tube is clean and dry, then slide the stem on considering desired rise or drop.

Headset Pre-load Adjustment

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

Handlebar Faceplate Attachment

Install the handlebar, place the faceplate, and thread bolts evenly to hold bars in the stem.

Handlebar Clamp Tightening

Adjust handlebar position and tighten clamp bolts to 6Nm incrementally in a cross pattern.

Steerer Clamp Bolt Tightening

Align stem with the front wheel and tighten steerer clamp bolts to 6Nm before riding.

The FUNN FUNNDURO STEM is a component designed for bicycles, specifically for connecting the handlebars to the steerer tube of the fork. It is engineered to provide a secure and stable connection, crucial for safe and responsive steering during cycling. The stem's primary function is to hold the handlebars in place, allowing the rider to control the direction of the bicycle.

Usage Features:

The installation process for the FUNN FUNNDURO STEM is detailed to ensure proper fitment and optimal performance. Before installation, it is essential to prepare the steerer tube. The FUNNDURO stem is designed for a 28.6mm (1 1/8") steerer tube. A critical step is to ensure the steerer tube has the correct length, leaving a 2-3mm gap from the top of the spacer or stem to 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.

The installation begins by removing all bolts from the stem. It is recommended to grease the threads and under the heads of these bolts to facilitate smooth tightening and prevent seizing. The external surface of the steerer tube must be clean and dry before sliding the stem onto it. The stem can be oriented to achieve the desired rise or drop, depending on the rider's preference and bicycle setup.

Once the stem is positioned, the top cap is fitted, and the headset pre-load bolt is tightened. This step is crucial for removing any play in the headset while ensuring the steering remains smooth and unrestricted. A proper pre-load adjustment prevents wobbling and ensures precise steering control.

The next stage involves installing the handlebar. The handlebar is placed into the stem, and the faceplate is positioned over the bar. The bolts are then threaded in evenly, just enough to hold the bars in the stem without fully tightening them. This allows for initial adjustments.

After the handlebar is loosely secured, the rider can adjust it to their preferred position. Once the desired angle and position are achieved, the top clamp bolts are tightened to 6Nm. It is strongly advised to tighten these bolts incrementally in a cross pattern. This method ensures that the pressure is distributed equally across the handlebar, preventing uneven stress and potential damage to the handlebar or stem.

Finally, the steerer clamp bolts are inserted. The stem must be carefully aligned with the front wheel to ensure straight steering. Once aligned, the stem bolts are tightened to 6Nm. It is imperative to ensure these stem bolts are fully tightened before riding. Riding with a loose stem can lead to serious accidents due to loss of steering control.

Maintenance Features:

Regular maintenance is crucial for the longevity and safety of the FUNN FUNNDURO STEM. It is recommended to check the torque for all bolts twice a year. This ensures that all connections remain secure and that no bolts have loosened over time due to vibrations or usage.

In addition to torque checks, a visual inspection of the stem and handlebar is necessary. Riders should look for any signs of damage, such as cracks, deformations, or unusual wear. If any damage is detected, it is critical to stop using the part immediately. Damaged components can compromise the structural integrity of the bicycle and lead to serious injury. In such cases, the damaged stem or handlebar should be replaced without delay. Adhering to these maintenance guidelines is essential for ensuring the continued safe operation of the bicycle and for complying with FUNN's warranty policy.