H012 ERGOTEC Ahead-Swell Eco Ahead 31.8, Length 10cm (Oversize)
If the bike has a stem with adjustable angle, then the position of the handlebars can be precisely “fine-tuned”. Angle adjustment is possible in both ahead stems and quill stems.
DimensionBare bore: 31.8
Extension: 100 mm
Clamp - D : 28.6
Weight : 295 g