Single-mount adjustable stem extension Ahead Set

This rapide height-adjustable bicycle stem is designed for aheadset steering. The height can be adjusted in a matter of seconds thanks to a clamping system rapide, with no tools required for adjustment. What's more, the handlebars can be easily rotated 90° in relation to the wheel, for space-saving storage of the bike. Operation is very easy thanks to the rapide clamping system, which allows you to raise the tube, turn the stem, then lower the tube again and retighten the lever.