Kinetic offers several adaptive bike mounting solutions. For bikes with smaller outside tire diameters less than 22 inches like BMX bikes, recumbent bikes and folding bikes, we have small wheel adapters. Kinetic also offers special cone cup adapters for certain models of internally-geared bike hubs and bikes with very low frame-spacing tolerances around the skewer and cone cup interface. We also offer trainer rear thru-axles for bikes that require them. If you need one, click here.