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Article published at:
July 09, 2026
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How Much Do Shimano Caliper Bleed Port Screws Weigh?
The bleed port screws on Shimano flat-mount road calipers weigh 4.6g per pair — identical steel across Dura-Ace R9270, Ultegra R8170, and 105 R7170. Titanium replacements drop to 1.8g, saving 2.8g for both calipers combined. Covers O-ring transfer, shallow aluminum thread engagement and grease practice, low torque values (1–2 Nm), and why the bleed port screw is the last steel part left on a fully titanium-hardware caliper.
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