1. Introduction
Thank you for choosing the Microshift R10 Drop Bar Shifter Set. This manual provides essential information for the proper installation, operation, and maintenance of your new shifters. Designed for 10-speed road systems, these shifters offer reliable performance and ergonomic comfort. Please read this manual thoroughly before installation and keep it for future reference.
2. Safety Information
Always prioritize safety when working with bicycle components. Improper installation or adjustment can lead to serious injury or damage to your bicycle.
- If you are unsure about any part of the installation process, consult a professional bicycle mechanic.
- Wear appropriate safety gear, including eye protection, during installation.
- Ensure all bolts and fasteners are tightened to the manufacturer's specified torque settings.
- Regularly inspect your shifters and cables for wear or damage. Replace worn components immediately.
- Test brake and shift functions thoroughly before riding.
3. Package Contents
Your Microshift R10 Drop Bar Shifter Set package includes the following items:
- Two (2) Microshift R10 Drop Bar Shifters (Left and Right)
- Shift Cables
- Cable Housing
4. Setup and Installation
The Microshift R10 shifters are designed for compatibility with Shimano 10-speed road systems. Follow these general steps for installation. Specific torque values and cable routing may vary based on your bicycle frame and handlebars.

Image: Microshift R10 Drop Bar Shifter Set. This image shows the shifters mounted on a bicycle's drop handlebars, illustrating their ergonomic design and position for both braking and shifting.
- Mounting the Shifters: Slide the shifters onto your drop handlebars. Position them ergonomically for comfortable reach to both brake levers and shift paddles. Tighten the clamp bolts securely, ensuring the shifters do not rotate on the bars. Refer to your handlebar manufacturer's recommendations for clamp area and torque.
- Routing Brake Cables: Insert the brake cables into the designated ports on the shifter bodies. Route the cables along the handlebars and through the frame, connecting them to your brake calipers. Adjust cable tension to ensure proper brake function without excessive lever travel.
- Routing Shift Cables: The R10 shifters feature external cable routing for smooth shifting. Insert the shift cables into the shifter bodies and route them along the handlebars, through the included cable housing, and to your front and rear derailleurs.
- Connecting to Derailleurs: Securely attach the shift cables to your front and rear derailleurs. Ensure the cables are routed correctly through any cable guides on your frame.
- Adjusting Derailleurs: Perform a full derailleur adjustment to ensure precise and smooth shifting across all gears. This typically involves setting limit screws and adjusting cable tension. The shifters have dedicated levers for independent up and down shifting, which will require careful adjustment for optimal performance.
- Customization: The shifters are customizable with replaceable hood covers and face plates (sold separately). This allows for personalization and maintenance.
5. Operating Instructions
The Microshift R10 Drop Bar Shifters provide intuitive control over your bicycle's gearing and braking.
- Braking: Pull the main lever towards the handlebar to engage the brakes. Apply even pressure for controlled stopping.
- Shifting Up (Larger Cog/Chainring): Use the smaller, inner lever to shift to a larger cog on the rear cassette or a larger chainring on the front. A single click typically corresponds to one gear change.
- Shifting Down (Smaller Cog/Chainring): Use the larger, main lever (when pushed inwards) to shift to a smaller cog on the rear cassette or a smaller chainring on the front.
- Multi-Shift: Depending on the model and adjustment, you may be able to shift multiple gears with a single, longer push of the shift lever.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your shifters.
- Cleaning: Keep the shifters clean from dirt and grime. Use a damp cloth and mild soap if necessary. Avoid harsh chemicals.
- Cable Inspection: Periodically check shift and brake cables for fraying, rust, or kinks. Replace damaged cables and housing promptly.
- Lubrication: Apply a small amount of bicycle-specific lubricant to the pivot points of the shift levers and the exposed sections of the shift cables to ensure smooth operation.
- Bolt Check: Ensure all mounting bolts are secure and tightened to the correct torque specifications.
7. Troubleshooting
If you encounter issues with your shifters, consider the following common solutions:
- Poor Shifting Performance: This is often due to incorrect cable tension or misaligned derailleurs. Re-adjust your derailleur limit screws and cable tension. Ensure cables are clean and lubricated.
- Stiff Levers: Check for dirt or corrosion in the shifter mechanism or cable housing. Clean and lubricate as needed. Replace cables and housing if they are old or damaged.
- Brake Lever Too Spongy/Hard: Adjust brake cable tension. Ensure brake calipers are functioning correctly and pads are not excessively worn.
- Noise: Investigate the source of any unusual noises. It could be loose components, dry cables, or misaligned parts.
If problems persist, consult a professional bicycle mechanic.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | SB-R402K-BK |
| Compatibility | Shimano 10-speed Road Systems |
| Material | Plastic, Aluminum, Stainless Steel |
| Color | Black/Silver |
| Product Dimensions | 10"L x 7.75"W (approximate) |
| Item Weight | 1.76 pounds (0.8 Kilograms) |
| Included Components | Shift Cables, Cable Housing |
| Number of Pieces | 2 (Left and Right Shifter) |
9. Warranty and Support
The Microshift R10 Drop Bar Shifter Set comes with a Limited Warranty. Please refer to the warranty card included with your purchase or visit the official microSHIFT website for detailed terms and conditions.
For technical support, replacement parts, or further assistance, please contact microSHIFT customer service through their official channels. Always provide your product model number (SB-R402K-BK) when seeking support.





