Altus SL-M310-L. Altus ST-M310-L2. Altus ST-M310-L4. Altus ST-EF510-L2A. Altus ST-EF510-L4A. The FD-M310 3 speed front derailleur is available in either conventional swing or top swing designs, this is with reference to where the clamp band is positioned relative to the derailleur cage, with a conventional swing derailleur the clamp band is above the cage where as a top swing design has the clamp band located under the cage.
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