Shimano BR-R451 entry-level mechanical caliper brake. Featuring Shimano's Super SLR system for a light braking action and accurate power modulation and feel.. Brake Type: Super SLR Dual Pivot
. Front Brake
. Reach: 57mm
. Brake shoe: R50T2
. Quick release: Yes
. Toe-in adjust: Yes
. Maximum tyre size: 32c
. Compatible rim width: 19-26mm