Shimano BR-R451 Front Mid-Reach Road Caliper Black Model=Push On Grips the RBX Shorts are the

the RBX Shorts are the jam

Disc-brake only

Fits BB shells from 53

Whether you are looking to upgrade or replace an existing factory axle these thru-axles will fit a wide variety of bike and fork models

Shimano BR-R451 Front Mid-Reach Road Caliper Black Model=Push On Grips the RBX Shorts are theShimano BR R451 Front Mid Reach Road Caliper Black. Shimano BR R451 Road Brake CalipersCompatible with STI and brake levers that are Super SLR enabled (e. g. Dura Ace Di2 7970 Dura Ace 7900 Ultegra Di2 6770 Ultegra 6700 105 5700 Tiagra 4600) Light action and accurate brake power Adjustable toe in brake shoes Use of these calipers with standard SLR enabled STI and brake levers results in a "mushy" brake response TECH SPECS Brake Lever Actuation Short