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- 22.2mm clamp diameter, Rapidfire shift pod
- Includes shifter, 2100mm shift cable with housing and cable fixing bolt unit for CJ-8S20 cassette joint
- Optical gear display
- Shimano 2-way release feature
- Shimano Alfine SL-S503 8-Speed Internally Geared Hub Shifters
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Shimano Alfine S503 8-Speed Rapidfire Shifter Black