Robert Axle Project by Chris Sgaraglino | December 10, 2017 Non-Drive Side one 5mm Spacer - I need two to make the clearance.Drive Side - the black extension is part of the dropout where the axle screws into.Drive Side - Fork modified to fit the wider axle width.Non-Drive Side - Fork modified to fit the wider widths.With no fork mods and no spacers, there is an offset clearance problem.Another example of the drive-side spacing.