Shimano R451 Silver Rear Mid-Reach Road Caliper. Product Details 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 powerAdjustable toe-in brake shoesUse of these calipers with standard SLR enabled STI and brake levers results in a "mushy" brake responseItem SpecificationsBrake Mount TypeMid Reach Caliper (47mm - 57mm)Brake PositionRearBrake Lever ActuationShort Pull Super SLRDefined ColorSilverPad TypeCartridge BR-R451 Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.