Shimano BR-R451 Front Mid-Reach Road Caliper Silver MFPN=145079 It features upgraded technology and

It features upgraded technology and premium engineering to provide more braking power than previous systems

10/12x135mm thru-axle

Now featuring a self-extracting axle-to-arm interface

barrel material aluminum max psi 300psi color silver

Clean looks

Shimano BR-R451 Front Mid-Reach Road Caliper Silver MFPN=145079 It features upgraded technology andShimano BR R451 Front Mid Reach Road Caliper Silver. 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