Designed for Aero MTB or Gravel. Our simple, bolt-on design allows for additional hand positions on long rides as well as creating an aero-tuck position should you wish to power along on the flats. The aero extension that can be fitted to all 31.8mm handlebars within minutes. The extension is designed to fit most popular GPS and Powermeter attachments and does not protrude excessively in any way. It is also a great spot to attached lights! Our Aero Bolt-On is produced in South Africa in small batches to ensure extremely high quality.