Shimano BR-R9270 Caliper Fixing Bolt B2

The Shimano Y2HW06010 Caliper Fixing Bolt B2 is a genuine Shimano replacement mounting bolt for selected flat mount hydraulic disc brake calipers.

This small but essential spare part is used to securely mount compatible Shimano road, gravel and MTB flat mount disc brake calipers. It is commonly listed for the Shimano Dura-Ace BR-R9270 caliper and is also shown as a matching replacement part for a range of compatible Shimano calipers, including Dura-Ace, Ultegra, 105 and GRX models.

As with all flat mount brake hardware, correct bolt selection is important for safe installation. Shimano technical documentation identifies Y2HW06010 as the Caliper Mounting Screw B2, and different fixing bolts may be required depending on the caliper, adapter and frame or fork mount setup.

Ideal for workshop servicing, brake installation or replacing a lost or damaged bolt, this genuine Shimano spare helps ensure your brake caliper is fitted securely and correctly.

Key Features

• Genuine Shimano replacement part
• Part number: Y2HW06010
• Caliper fixing bolt / mounting screw B2
• Designed for Shimano flat mount hydraulic disc brake calipers
• Commonly listed for Shimano Dura-Ace BR-R9270
• Also shown as compatible with selected Ultegra, 105 and GRX flat mount calipers
• Suitable for repair, servicing or bike builds
• Use only where the Shimano service diagram specifies a B2 fixing bolt

Compatibility Notes

Commonly associated compatible calipers include:

• Shimano Dura-Ace BR-R9270
• Shimano Dura-Ace BR-R9170
• Shimano Ultegra BR-R8170
• Shimano Ultegra BR-R8070
• Shimano 105 BR-R7170
• Shimano GRX BR-RX820 / BR-RX820-LE

Always confirm the correct fixing bolt for your frame, fork, adapter and caliper combination before installation.