Bike Fork Mount Inserts

Each fork mount insert is designed to fit a specific bike fork width and axle diameter.  

To check the size first measure the diameter of the axle, then you will need to know what the width is, to do this drop the front wheel out and measure the internal flats of the fork, (the faces that the wheel hub tightens on) 

e.g (12x100) = 12mm diameter axle x 100mm between fork internal face.