1. Product Overview
The mellystore Bicycle Stem Riser is designed to increase the height of your bicycle's handlebars, providing a more comfortable and ergonomic riding position. Constructed from high-strength aluminum alloy, this extender offers durability, corrosion resistance, and stability. It is compatible with most bicycles, including mountain bikes (MTB) and road bikes, that feature a 28.6mm (1-1/8 inch) threadless steerer tube.
Image 1.1: The mellystore Bicycle Stem Riser, shown with an accompanying Allen key for installation.
Key Features:
- High-Quality Material: Made from refined high-strength aluminum alloy for durability and corrosion resistance.
- Double Screw Fastening: Features a double screw locking design with steel screws to ensure the handlebar remains firm and secure, minimizing the risk of loosening during rides.
- Adjustable Height: Allows for an increase in handlebar height by up to 70mm, utilizing included washers for precise adjustment. This helps reduce pressure on the waist and wrists.
- Wide Compatibility: Suitable for most bicycles, including mountain bikes, road bikes, and BMX bikes, with a 28.6mm (1-1/8 inch) threadless fork steerer tube.
Image 1.2: Diagram illustrating the individual components of the stem riser, including the dust cap, stem cover, threaded rod, spacers, riser column, and screws.
2. Installation Guide
Proper installation is crucial for safety and performance. Please follow these steps carefully. It is recommended to have basic bicycle maintenance knowledge or seek professional assistance if unsure.
Tools Required:
- Allen key (usually 5mm or 6mm, often included)
- Torque wrench (recommended for precise tightening)
Image 2.1: A visual guide detailing the six steps for installing the stem riser.
Installation Steps:
- Remove Top Cap and Stem Bolts: Using an Allen key, loosen and remove the top cap bolt from the center of your existing stem. Then, loosen the side bolts on your stem that clamp it to the fork steerer tube.
- Remove Handlebar and Stem: Carefully slide the handlebar and stem assembly upwards and off the fork steerer tube. Ensure that no cables are strained or damaged during this process.
- Install Stem Riser: Slide the mellystore Stem Riser onto the fork steerer tube. Ensure it sits flush.
- Adjust Height with Spacers: Place the desired number of spacers (washers) on top of the stem riser to achieve your preferred handlebar height. The kit includes 5 washers for fine adjustment.
- Reinstall Handlebar and Stem: Place your original stem and handlebar assembly on top of the spacers and the stem riser. Ensure the handlebar is aligned correctly with the front wheel.
- Tighten Bolts: First, tighten the top cap bolt to remove any play in the headset. Then, tighten the two side bolts on the stem riser and the two side bolts on your original stem evenly and securely. Refer to your bicycle's manufacturer specifications for recommended torque settings.
After installation, check that the handlebar is firmly secured and does not rotate independently of the front wheel. Also, ensure there is no play in the headset by applying the front brake and rocking the bike back and forth.
Image 2.2: Visual comparison demonstrating the improved riding posture and comfort achieved after installing the stem riser.
3. Operation and Adjustment
Once installed, the stem riser allows for a more upright riding position. You can fine-tune the handlebar height by adjusting the number of spacers used.
Adjusting Handlebar Height:
- To increase or decrease the height, you will need to repeat steps 1-5 of the installation guide.
- Add more spacers below your original stem to raise the handlebar further.
- Remove spacers to lower the handlebar.
- Always ensure that the top cap bolt is tightened first to preload the headset bearings, followed by the stem and riser clamping bolts.
Regularly check all bolts for tightness, especially after the first few rides, to ensure safety.
4. Maintenance
The mellystore Bicycle Stem Riser requires minimal maintenance. However, periodic checks are recommended to ensure its longevity and safe operation.
- Regular Inspection: Periodically inspect the stem riser and all associated bolts for any signs of wear, damage, or corrosion.
- Tightness Check: Ensure all clamping bolts (on the riser and your original stem) remain securely tightened. Loose bolts can lead to instability and potential accidents.
- Cleaning: Clean the stem riser with a damp cloth to remove dirt and grime. Avoid using harsh chemicals that could damage the finish.
- Lubrication: While not typically required for the riser itself, ensure your headset bearings are properly maintained and lubricated according to your bicycle's manual.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Handlebar feels loose or rotates | Clamping bolts on stem or riser are not tight enough. | Retighten all clamping bolts securely. Ensure the top cap bolt is tightened first to remove headset play. |
| Clicking or creaking noise from headset area | Headset not properly preloaded; loose top cap bolt. | Loosen stem clamping bolts, tighten top cap bolt until play is removed but steering is still smooth, then retighten stem clamping bolts. |
| Difficulty installing riser | Incompatible steerer tube diameter. | Verify your bicycle's steerer tube diameter is 28.6mm (1-1/8 inch). This riser is not compatible with threaded steerer tubes or other diameters. |
6. Specifications
- Model: Schwarz-100mm
- Material: High-strength Aluminum Alloy
- Color: Black
- Steerer Tube Diameter Compatibility: 28.6mm (1-1/8 inch) threadless
- Adjustable Height Increase: Up to 70mm (using included spacers)
- Package Dimensions: Approximately 17.3 x 10.2 x 5.5 cm
- Weight: Approximately 230 grams
- Batteries Included: No
Image 6.1: Dimensional diagram of the stem riser, indicating its total length and the range of adjustable height.
Image 6.2: Visual guide indicating compatibility with 28.6mm threadless fork pivots for mountain bikes and road bikes, and incompatibility with certain city bike setups.
7. Warranty Information
For specific warranty details regarding your mellystore Bicycle Stem Riser, please refer to the product packaging or the official mellystore website. Warranty terms typically cover manufacturing defects under normal use conditions.
8. Customer Support
If you have any questions, require assistance with installation, or encounter issues not covered in this manual, please contact mellystore customer support through the retailer where you purchased the product or visit the official mellystore website for contact information.