A small but powerful billet aluminum 2-piston caliper on a billet aluminum bracket. Comes complete with a 48 tooth sprocket for use with 530 series chain. The polished stainless steel chain sprocket is available with 1" (50.8mm) inner diameter for use with wheel hubs styles up to 1999, or a 2.22" (56.4mm) inner diameter for use with 2000 to present style wheel hubs. Caliper bracket has a 1" diameter axle hole which can also be used for 25mm wheel axles. Must be spaced out for use with 3/4" (19.05mm) wheel axles. Available for both left and right side use with the caliper and bracket in polished or black anodized.