Quick Summary
The CYSKY Mountain Bike Front Derailleur is a clamp-on 3-speed front derailleur for an MTB mountain bicycle. It is designed for top or bottom cable routing and is sized for 31.8 mm and 34.9 mm seat tube diameters.
The stated setup details also include a compatible three-piece crankset with 42-32-24T gearing and a 50 mm chain center line. Those are the main checks to compare before choosing this part for a build or replacement.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Product type | Clamp-on 3-speed mountain bike front derailleur for an MTB bicycle. |
| Cable routing | Supports top or bottom cable routing, so routing style matters when matching the part to the bike. |
| Seat tube diameter | Fits 31.8 mm and 34.9 mm seat tube diameters. |
| Crankset compatibility | Listed for a three-piece type crankset with 42-32-24T gearing. |
| Chain line | 50 mm chain center line. |
What to Compare Before Buying
- Seat tube diameter: Match the clamp size to 31.8 mm or 34.9 mm as needed for the frame.
- Cable routing: Confirm whether your bike uses top or bottom routing.
- Crankset setup: Check that the drivetrain matches the stated three-piece type and 42-32-24T gearing.
- Chain line: Compare the listed 50 mm chain center line with your bike’s setup.
Compatibility, Size and Fit
This derailleur is for an MTB mountain bicycle and uses a clamp-on mount. The key fit points are the seat tube diameter, the cable routing style, and the drivetrain layout. Matching those details is more important than the general bike style alone.
Before You Decide
Confirm the seat tube diameter, routing direction, crankset type, and chain line before choosing an offer. This part is built around a specific 3-speed setup, so the exact drivetrain match matters.
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