Burley Ballz Nutted Axle: 3/8 x 26. The Burley Coho Ballz Nutted Axle Adapter includes a set of threaded Ballz that replace the nuts on your current nutted axle enabling compatibility with the Coho XC cargo trailer. This adapter is required to use the Coho XC on bikes with nutted axles.
Two Burley Coho Ballz that thread onto the existing nutted axle
Quick and easy one-time installation
