Based on the Roller Quill Stem we have derived a version for Ahead forks. All tubes are made of the finest Columbus CrMo and are weight-optimized in some places. As a result, the stem weighs a sensational 225g (model F10). But the best thing is: it is finally available in back-friendly dimensions. Only available for 1" ahead forks. 
 
 
Model designations:
 
Angle A=11° | F=20° | K=26° | P = 53°
Reach, measured perpendicular to the shaft: 70, 90, 100, 120 or 130mm