Shimano Spares BR-R8170 caliper fixing bolt, for C2 10 mm

Genuine Shimano C2 flat mount caliper fixing bolt (no.22 in parts diagram) for rear hydraulic disc brake installations where the fixing bolt passes through the frame or adapter mount into the caliper. These are small parts doing a very important job: choose the correct length and the caliper sits securely, cleanly and exactly where Shimano intended. This listing covers the Shimano C2 fixing bolt range used with flat mount road disc brake calipers, with each option selected by rear mount thickness. The C2 dimension in the product option refers to the rear frame or mount thickness, not the physical bolt length. Use the guide below to match the mount thickness to the correct Shimano C2 bolt length. Bolt Length Guide Rear mount thickness / option Required C2 bolt length Shimano part number C2 for 10 mm rear mount thickness 19 mm bolt length Y2J708000 C2 for 15 mm rear mount thickness 24 mm bolt length Y2J708050 C2 for 20 mm rear mount thickness 29 mm bolt length Y2J708010 C2 for 25 mm rear