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This is the SRAM X-3 Rear Derailleur for 7/8/9 Speed Mountain Bikes.
| SRAM X3 | SRAM X4 | |
|---|---|---|
| Level | Entry level | One step higher |
| Speeds | 7 / 8 / 9 | 7 / 8 / 9 variants |
| Actuation | SRAM 1:1 | SRAM 1:1 |
| Typical use | Basic MTB / hybrid | MTB / hybrid, better quality |
| Max cassette* | Up to 32T | Typically up to 34T |
| Construction | Basic | Better construction/refinement |
| Shifting | Good | Crisper / more refined |
| Replacement choice | Budget | Preferred if available |
SRAM confirms X3 uses 1:1 Actuation and supports 7/8/9-speed drivetrains with a 32T maximum sprocket. SRAM's technical documentation places X3 and X4 in the same 1:1-actuation family. SRAM
Compatibility: An X4 derailleur can generally replace an X3 when used with the corresponding SRAM 1:1 7/8/9-speed shifter and suitable cassette capacity.
Important: Don't substitute a conventional Shimano MTB derailleur—the cable-pull system is different.
Workshop choice: If repairing an older SRAM X3-equipped bicycle and both are available, X4 is the preferable upgrade/replacement.
SKU# RD-X3-A1 00.7515.050.000
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