Pilo D999 Derailleur Hanger for Java

The Pilo D999 is a frame-specific replacement rear derailleur hanger for selected Java bicycles. It is intended for riders and workshops replacing a bent, damaged or missing original hanger while keeping the bicycle's existing derailleur mounting arrangement. Pilo lists the D999 specifically for the Java Fire 4 and Feroce 2, so it should be chosen by confirmed frame compatibility rather than by derailleur brand or visual similarity alone.

Restores Accurate Alignment. The derailleur hanger forms the connection between the rear derailleur and the frame, so using the correct replacement is important for consistent shifting and proper derailleur positioning relative to the cassette. Pilo manufactures the D999 as a dedicated replacement for the listed Java frames rather than as a universal hanger. That makes it suitable both as a workshop replacement and as a spare for riders who want the correct hanger available during travel or longer cycling trips.

Confirm your Frame. Similar-looking hangers can use different mounting shapes, axle interfaces or attachment points, so compare the original hanger with Pilo's product images before ordering. If the bicycle model is uncertain, identify the frame first rather than assuming another Java model uses the same hanger. Correct hanger selection is especially important before attempting derailleur adjustment, because alignment work cannot compensate for an incorrectly matched replacement part.