1. 서론
This manual provides essential information for the proper setup, operation, and maintenance of your SHIMANO XT RD-M8100-SGS or RD-M8120-SGS 12-Speed Rear Derailleur. Designed for mountain biking, this component delivers precise and stable shifting performance across various terrains. Please read this manual thoroughly before use to ensure optimal performance and safety.
2. 주요 특징
- Optimized Shifting Performance: Provides high-speed and precise shifting performance, optimized for diverse trail conditions.
- Quiet Drivetrain: Ensures a quiet drivetrain in any gear position, enhancing the riding experience.
- Stable Drivetrain: Maintains stable drivetrain performance even on undulating and challenging terrain.
- New Bumper Design: Features a new bumper integrated into the pulley cage to improve drivetrain silence and reduce chain slap.
- 로우 프로file 설계: Reduces the risk of damage from trail obstacles.
- Large 13T Pulleys: Incorporates large 13-tooth pulleys to increase efficiency and improve chain retention.
- 12단 변속기 호환: Fully compatible with 12-speed drivetrains, designed for front single chainring setups.
- Fast, Shockless Shifting: Delivers quick and smooth gear changes.
3. 설정 및 설치
Proper installation is crucial for the performance and longevity of your derailleur. It is highly recommended that installation be performed by a qualified bicycle mechanic. Always refer to the official SHIMANO dealer manuals or technical service instructions for detailed, step-by-step installation procedures.
3.1. 일반 설치 단계 (이하 생략)view):
- 설치: Securely attach the rear derailleur to the bicycle's derailleur hanger.
- 케이블 라우팅: Route the shift cable correctly through the frame and connect it to the derailleur.
- 제한 나사 조정: Adjust the high (H) and low (L) limit screws to prevent the chain from overshifting off the smallest and largest cogs.
- B-장력 조정: Adjust the B-tension screw to optimize the distance between the upper guide pulley and the cassette cogs.
- 인덱싱: Fine-tune the cable tension for precise gear changes across all 12 speeds.


4. 운영
The SHIMANO XT RD-M8100-SGS / RD-M8120-SGS derailleur operates mechanically, providing crisp and reliable gear changes. To shift gears, use your compatible 12-speed shifter to move the chain across the cassette cogs. Push the lever to shift to a larger cog (easier gear) and release/push the other lever to shift to a smaller cog (harder gear).
- 부드러운 변속: Always ease off the pedal pressure slightly when shifting to allow the chain to move smoothly between cogs.
- 변화를 예측하세요: Shift gears proactively before encountering steep climbs or descents to maintain momentum and control.
5. 유지관리
정기적인 유지보수는 변속기의 수명을 연장하고 일관된 성능을 보장합니다.
5.1. 청소:
- Clean the derailleur, chain, and cassette regularly with a suitable bicycle degreaser and brush. Rinse thoroughly with water and dry.
5.2. 윤활:
- After cleaning, apply a high-quality bicycle chain lubricant to the chain. Lubricate the derailleur's pivot points sparingly.
5.3. 검사:
- Periodically inspect the derailleur for any signs of damage, bending, or excessive wear, especially on the pulley wheels.
- 변속 케이블의 마모 또는 부식 여부를 점검하십시오. 필요한 경우 교체하십시오.
- Ensure the derailleur hanger is straight and not bent. A bent hanger can cause poor shifting.
6. 문제 해결
변속기에 문제가 발생하면 다음과 같은 일반적인 문제 해결 단계를 고려하십시오.
- Poor Shifting / Skipping Gears:
- 변속 케이블 장력을 점검하십시오. 변속 레버 또는 변속기의 배럴 조절기를 사용하여 조정하십시오.
- Verify limit screw settings. Incorrect settings can prevent full range of motion or cause overshifting.
- Inspect the derailleur hanger for bends. A bent hanger is a common cause of poor shifting.
- Ensure the chain and cassette are clean and properly lubricated.
- 과도한 소음:
- Check B-tension adjustment. Incorrect B-tension can cause the upper pulley to rub against the cassette.
- Ensure the chain is not too long or too short.
- Verify that the chain is not rubbing against the derailleur cage.
For more complex issues, consult a professional bicycle mechanic or refer to the comprehensive technical documentation available on the official SHIMANO web대지.
7. 사양
| 기인하다 | 세부 사항 |
|---|---|
| 모델 번호 | RD-M8100-SGS, RD-M8120-SGS |
| Rear Compatible Speed | 12단 변속 |
| 교대 유형 | 기계적 |
| 호환 체인 | HG 12단 변속기 |
| Low Sprocket (Min/Max) | 45톤 / 51톤 |
| Top Sprocket (Min/Max) | 10톤 / 10톤 |
| 총 용량 | 41티 |
| Maximum Front Tooth Difference | 0T (for 1x systems) |
| 평균 체중 | 284g |
| 재료 | 알류미늄 |
| 제품 크기(LxWxH) | 7인치 x 7인치 x 5인치 |
| 제조사 모델명 | 587830 |
| 한국어: | 192790443645 |
8. 보증 및 지원
This SHIMANO product is covered by a 90일 한정 보증 구매일로부터. 이 보증은 정상적인 사용 하에서 재료 및 제조상의 결함을 포함합니다.
8.1. 보증 청구:
For warranty claims, please retain your proof of purchase and contact the authorized SHIMANO dealer from whom you purchased the product. They will guide you through the warranty process.
8.2. 기술 지원:
For technical assistance, detailed product information, or to access the latest technical service instructions and manuals, please visit the official SHIMANO website or contact your local SHIMANO distributor.
시마노 공식 웹사이트 Web대지: https://bike.shimano.com/





