Find helpful customer reviews and review ratings for SHIMANO M315 Hydraulic Disc Brake Set Front 800mm and Rear 1400mm - Euro Model at Amazon.com. Read honest and unbiased product reviews вЂ¦ Find helpful customer reviews and review ratings for SHIMANO M315 Hydraulic Disc Brake Set Front 800mm and Rear 1400mm - Euro Model at Amazon.com. Read honest and unbiased product reviews вЂ¦