A stock brake setup will not work for a springer front end. Running disc brakes on a springer is no problem, however, you need a specific springer caliper bracket and the proper wheel spacers for the job. These style brackets will accept most aftermarket 2-piston and 4-piston calipers. The caliper bracket is connected to the springer with a brake anchor rod; this keeps the caliper and bracket from simply spinning around with the wheel when the brakes are applied.