Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Shimano 105 ST-R7020 Right 11-Speed Hydraulic Brake/Shift Lever and BR-R7070 Rear Flat Mount Caliper. Please read this manual thoroughly before use to ensure safe and correct handling of the product.
The Shimano 105 ST-R7020 lever combines precise 11-speed mechanical shifting with powerful hydraulic disc braking. The BR-R7070 caliper is designed for flat mount frames and offers consistent braking performance.
Safety Information
- Always wear appropriate safety gear, including gloves and eye protection, when installing or maintaining bicycle components.
- Ensure all bolts are tightened to the manufacturer's specified torque values. Overtightening or undertightening can lead to component failure.
- Hydraulic brake systems contain mineral oil. Avoid contact with skin and eyes. In case of contact, rinse thoroughly with water.
- Incorrect installation or adjustment of brake and shift components can lead to loss of control and serious injury. If you are unsure about any procedure, consult a professional bicycle mechanic.
- Regularly inspect brake pads for wear. Replace them before they reach their wear limit.
- Do not modify any components. Use only genuine Shimano replacement parts.
Setup and Installation
Proper installation is crucial for the performance and safety of your hydraulic brake and shift system. Refer to the detailed instructions below.
1. Mounting the ST-R7020 Lever
Mount the ST-R7020 right lever onto the handlebar. Ensure the lever is positioned comfortably for braking and shifting, and tighten the clamp bolt to the specified torque. The lever is designed for standard reach, but further adjustment is possible.
Image: Shimano 105 ST-R7020 Right Hydraulic Brake/Shift Lever. This image shows the right-hand lever unit, which integrates both the brake and 11-speed shift mechanisms.
2. Mounting the BR-R7070 Caliper
Attach the BR-R7070 rear flat mount caliper to your frame's flat mount brake bosses. Ensure the correct adapter (if needed for rotor size) is used and align the caliper over the rotor before tightening the mounting bolts to the specified torque.
Image: Shimano BR-R7070 Rear Flat Mount Caliper with hydraulic hose. This image displays the rear flat mount disc brake caliper, connected to its hydraulic line, ready for installation.
3. Connecting Hydraulic Lines and Bleeding
Connect the hydraulic hose from the ST-R7020 lever to the BR-R7070 caliper. Ensure all connections are secure. The hydraulic system must be properly bled to remove any air bubbles, which can compromise braking performance. Follow Shimano's official bleeding procedure carefully, using genuine Shimano mineral oil and a bleeding kit.
4. Shift Cable Routing
Route the shift cable from the ST-R7020 lever to the rear derailleur. Ensure the cable housing is cut to the correct length and that there are no sharp bends that could impede shifting performance. Secure the cable to the derailleur and adjust tension as needed for smooth 11-speed shifting.
5. Lever Reach Adjustment
The ST-R7020 lever features reach adjustment up to 15mm, allowing you to customize the distance of the lever blade from the handlebar. Use a small hex key to adjust the screw located on the lever body to achieve your preferred reach. This enhances comfort and control.
Image: Diagram illustrating ergonomic hood design, flat-mount disc brake caliper, and 15mm lever reach adjustment. This visual highlights key features for comfort and compatibility.
Operating Instructions
Shifting Operation (11-Speed)
- Upshifting (to a smaller cog/higher gear): Push the smaller lever blade inwards towards the handlebar. A single click shifts one gear.
- Downshifting (to a larger cog/lower gear): Push the main brake lever blade inwards. The lever allows for multiple shifts with a single sweep.
- Ensure smooth and deliberate lever movements for optimal shifting performance.
Braking Operation (Hydraulic Disc)
- Apply pressure to the main lever blade to engage the hydraulic disc brake.
- Hydraulic disc brakes offer powerful and consistent braking. Apply pressure gradually to modulate braking force.
- Avoid sudden, hard braking, especially on loose surfaces, to prevent loss of traction.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your Shimano components.
- Cleaning: Regularly clean the levers, calipers, and rotors with a mild detergent and water. Avoid using harsh chemicals or solvents that could damage seals or finishes.
- Brake Pad Inspection: Inspect brake pads frequently for wear. Replace pads when the friction material is worn down to 0.5mm or less. Always replace pads as a pair.
- Hydraulic Fluid Check: Periodically check the hydraulic fluid level and condition. If the brake lever feels spongy or braking performance degrades, the system may need bleeding or fluid replacement. Use only Shimano genuine mineral oil.
- Cable and Housing: Inspect shift cables and housing for fraying, kinks, or corrosion. Replace them if any damage is observed to maintain smooth shifting.
- Lever Pivots: Keep the lever pivots clean and lightly lubricated to ensure smooth operation.
- Rotor Inspection: Check brake rotors for excessive wear, warping, or contamination. Replace damaged rotors.
Troubleshooting
This section addresses common issues you might encounter.
- Poor Shifting Performance:
- Check shift cable tension and adjust as needed.
- Inspect shift cable and housing for damage or friction.
- Ensure the rear derailleur is properly aligned and adjusted.
- Spongy Brake Lever:
- This usually indicates air in the hydraulic system. The system needs to be bled.
- Check for leaks in the hydraulic lines or connections.
- Brake Rubbing:
- Ensure the caliper is properly aligned over the rotor. Loosen mounting bolts, squeeze the brake lever, and retighten bolts.
- Check for bent or warped rotors.
- Verify that the brake pads are not excessively worn or contaminated.
- Brake Noise (Squealing/Grinding):
- Clean rotors and pads. Contamination (oil, grease) is a common cause.
- Ensure pads are bedded in correctly.
- Check for loose caliper mounting bolts.
Specifications
| Brand | SHIMANO |
| Model Numbers | ST-R7020 (Lever), BR-R7070 (Caliper) |
| Hand Orientation | Right |
| Speed Compatibility | 11-Speed |
| Brake Type | Hydraulic Disc |
| Caliper Mount Type | Flat-Mount |
| Material | Aluminum (Lever/Handle), Multi (Overall) |
| Lever Reach Adjustment | Up to 15mm |
| Brake Fluid | Shimano Mineral Oil |
| Claimed Weight (Pair) | 1lb 5.5oz (610g) |
| Product Dimensions | 7.4"L x 3.2"W |
Warranty and Support
This product comes with a Limited Warranty from Shimano. For specific warranty terms and conditions, please refer to the documentation included with your purchase or visit the official Shimano website.
For technical support, service, or replacement parts, please contact your authorized Shimano dealer or visit the Shimano global website for contact information in your region. Always use genuine Shimano parts for repairs and maintenance to ensure compatibility and safety.
Manufacturer Part Number: IR7020DRRDSC170A
UPC: 689228984790
