Shimano Dura-Ace BR-R9170 Flat Mount Disc Brake Caliper Size:Front Stiff structure in the rear

Stiff structure in the rear part of the brake

5mm with angle shim

Dry garments flat or hanging

and also keeps your internal wires and hoses from rubbing on the crank spindle

Shimano Dura-Ace BR-R9170 Flat Mount Disc Brake Caliper Size:Front Stiff structure in the rearThe Dura Ace R9100 series of flat mount disc brakes bring powerfully integrated brake performance to the highest rungs of road cycling. The Shimano Dura Ace BR R9170 Flat Mount Disc Brake Caliper is lightweight while offering better control and confidence in race conditions. Specifications Optimally balanced hydraulic brake system for racing Easy and clean bleeding system One piece alloy body design Integrated low profile caliper design Light weight