1. Produto rematadoview
The microSHIFT R10 Rear Derailleur is engineered for 10-speed road bicycle systems, offering reliable and precise shifting performance. Its construction features forged and CNC machined aluminum, ensuring both durability and a lightweight design. The steel cage enhances resistance to chain-rub wear, contributing to the derailleur's longevity.
This medium cage derailleur is designed to accommodate a maximum cog size of 34 teeth and provides a total chain wrap capacity of 39 teeth, making it suitable for a wide range of road cycling applications. It is compatible with Shimano 10-speed road systems, excluding the Tiagra 4700 series.

Figure 1: The microSHIFT R10 Rear Derailleur, showcasing its black finish, aluminum body, and steel cage with jockey wheels.
Características principais:
- Medium cage design with 39t chain wrap capacity.
- Supports a maximum cog size of 34 teeth.
- Constructed from forged and CNC machined aluminum for lightweight durability.
- Steel cage for enhanced resistance to chain-rub.
- Compatible with Shimano 10-speed road systems (excluding Tiagra 4700).
2. Configuración e instalación
Unha instalación axeitada é crucial para un rendemento e unha seguridade óptimos. Se non tes claro algún paso, recoméndase buscar a axuda dun mecánico de bicicletas cualificado.
2.1 Ferramentas necesarias:
- Hex key set (typically 5mm for mounting bolt)
- Cortadores de cable
- Crimpadoras de cables
- Torque wrench (recommended for precise tightening)
2.2 Pasos da instalación:
- Mounting the Derailleur: Thread the derailleur onto the derailleur hanger on your bicycle frame. Ensure it is properly aligned and tighten the mounting bolt to the manufacturer's recommended torque specifications (typically 8-10 Nm).
- Instalación da cadea: Install your 10-speed bicycle chain, ensuring it is the correct length for your drivetrain setup.
- Enrutamento de cables: Route the shifter cable from your shifter through the frame (if internal) and attach it to the cable fixing bolt on the derailleur. Pull the cable taut and secure it.
- Limit Screw Adjustment:
- High Limit (H) Screw: Adjust the H-screw so that the upper guide pulley aligns with the smallest cog when the chain is on it. This prevents the chain from shifting off the outside of the cassette.
- Low Limit (L) Screw: Adjust the L-screw so that the upper guide pulley aligns with the largest cog when the chain is on it. This prevents the chain from shifting into the spokes.
- B-Tension Adjustment: With the chain on the largest cog and smallest chainring, adjust the B-tension screw to set the gap between the upper guide pulley and the largest cog. A gap of 5-6mm is generally recommended, but consult your bicycle's specific requirements.
- Indexing Adjustment: Fine-tune the shifting by adjusting the barrel adjuster on the shifter or derailleur. Shift through all gears, ensuring smooth and precise transitions.
3. Instrucións de funcionamento
The microSHIFT R10 Rear Derailleur operates in conjunction with your 10-speed road shifter to move the chain across the rear cassette cogs, allowing you to select different gear ratios.
3.1 Shifting Gears:
- To shift to a larger cog (easier gear), actuate your shifter to release cable tension.
- To shift to a smaller cog (harder gear), actuate your shifter to pull cable tension.
- Always pedal forward while shifting to ensure smooth chain movement and prevent damage to the drivetrain components.
- Avoid shifting under heavy load, such as climbing a steep hill, as this can cause stress on the chain and derailleur.
4. Mantemento
Regular maintenance will extend the life of your microSHIFT R10 Rear Derailleur and ensure consistent performance.
4.1 Limpeza:
- After each ride, especially in wet or dirty conditions, wipe down the derailleur body and jockey wheels with a clean rag.
- Use a degreaser specifically designed for bicycles to remove stubborn grime from the jockey wheels and cage. Rinse thoroughly with water and dry.
4.2 Lubricación:
- Apply a small amount of bicycle-specific lubricant to the pivot points of the derailleur body and the jockey wheel bearings periodically.
- Avoid over-lubrication, as this can attract dirt. Wipe off any excess lubricant.
4.3 Inspección:
- Regularly check the derailleur hanger for alignment. A bent hanger is a common cause of poor shifting.
- Inspect the jockey wheels for wear. Worn teeth can lead to poor shifting and chain noise. Replace them if necessary.
- Check all bolts for tightness, including the mounting bolt and cable fixing bolt.
5 Solución de problemas
This section addresses common issues you might encounter with your rear derailleur.
| Problema | Causa posible | Solución |
|---|---|---|
| Poor or Slow Shifting |
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| Chain Rubbing/Noise |
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| Chain Drops Off Cassette |
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If these solutions do not resolve the issue, it is advisable to consult a professional bicycle mechanic.
6. Especificacións
| Especificación | Valor |
|---|---|
| Marca | microSHIFT |
| Número de modelo | RD-R51M-BK |
| Velocidades da transmisión | 10-Velocidade |
| Cage Length | Medio |
| Chain Wrap Capacity | 39 dentes |
| Largest Cog (Max) | 34 dentes |
| Rear Der/Shifter Compatibility | Road (Shimano 10-speed, not Tiagra 4700) |
| Tipo de montaxe | 10x1 Standard (Direct Mount) |
| Material | Forged and CNC machined Aluminum (body), Steel (cage) |
| Cor | Negro |
| Peso do elemento | 16 onzas (aprox. 454 g) |
| Dimensións do paquete | 7 x 5 x 2 polgadas |
7. Garantía e soporte
For specific warranty information regarding your microSHIFT R10 Rear Derailleur, please refer to the warranty documentation provided with your purchase or visit the official microSHIFT websitio. Os termos e condicións da garantía poden variar segundo a rexión e o vendedor.
If you require technical assistance, have questions about installation, or need to report a defect, please contact the retailer from whom you purchased the product or microSHIFT customer support directly. When contacting support, please have your product model number (RD-R51M-BK) and proof of purchase readily available.
For additional resources and product information, you may visit the microSHIFT official website or consult reputable bicycle repair guides.





