With its retro-inspired looks. silver colour scheme, flip design and SPD clipless pedal compatibility, the ACID pedal COMBO A21 Classic offers the best of all worlds. The aluminium cage with integrated pins for a secure grip is perfect for use with any footwear, offering just-get-on-and-go functionality. On the reverse side, the SPD-compatible binding system allows any SPD cleat-equipped shoe to clip in, for a more sporty ride. StVZO-certified reflectors comply with all German road traffic regulations, for added visibility. And sealed industrial and needle bearings plus a CNC-machined Cr-Mo axle ensure a long, trouble-free service life.