Pilo D1139 Derailleur Hanger for Guerciotti, Corratec, Motobecane, Bombtrack, Blue, Ribble, kestrel

The Pilo D1139 is a frame-specific replacement rear derailleur hanger for selected bicycles from Guerciotti, Corratec, Motobecane, Bombtrack, Blue, Ribble and Kestrel. It is intended for riders and workshops replacing a bent, damaged or missing original hanger while keeping the frame's existing derailleur mounting arrangement. Its key distinction is that it is manufactured as a dedicated replacement rather than a universal hanger, so compatibility should be established from the bicycle model and original hanger shape before installation.

Restores Correct Alignment. The derailleur hanger positions the rear derailleur relative to the cassette, making an accurately matched replacement important when shifting has been affected by impact or hanger damage. Replacing the damaged part gives the derailleur the correct mounting reference before final alignment and indexing are carried out. This makes the D1139 useful both for workshop repairs and as a spare for riders travelling with a compatible road, gravel or cyclocross bike.

Confirm the Frame. Pilo lists several brands for the D1139, but some applications are identified only as various models while others have specific model and year information. Bombtrack and Ribble applications are documented in greater detail, while Blue, Corratec, Guerciotti, Kestrel and Motobecane require closer model verification. Compare the existing hanger from both sides with the product images and, where possible, confirm the frame model before ordering. Similar-looking hangers are not necessarily interchangeable, and derailleur adjustment cannot compensate for an incorrectly matched mounting interface.