Shimano BR-R451 Rear Mid-Reach Road Caliper Silver MFPN=Y1XK98010 Color Silver Range 11-40 Cassette

Color Silver Range 11-40 Cassette Cogs 11-13-15-18-21-24-28-34-40 Cassette Body Type Shimano/SRAM 8 9 10 Speed Drivetrain Speeds 9 Defined Color Silver

14mm 4130 chromoly axle bolts with 17mm 4130 chromoly female axle

The top cap on these headsets have unique raised features that key to Knock Block compatible stems (made by Bontrager

Modular crank lock ring removal and installation tool

Shimano BR-R451 Rear Mid-Reach Road Caliper Silver MFPN=Y1XK98010 Color Silver Range 11-40 CassetteShimano BR R451 Rear 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