CANYON V13 1 1/4 StemThe square cross sectional profile on V13 road bike stems guarantees a solid transition between the handlebars and the fork shaft. Product description Together with the handlebar clamp design, we have been able to increase torsional stiffness by up to 40%. Vertical flex is still enabled to ensure more rider comfort, however, under increased loads from sprinting or climbing out of the saddle, the whole front end remains perfectly stiff to transfer all