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July 14, 2026
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Shimano Pivot Bolt: R7170 8.4g vs Titanium 2.0g (Save 6.4g)
How much does a Shimano rear derailleur pivot bolt weigh? The 105 R7170 uses a thick steel pin at 8.4g — the heaviest single bolt in the entire derailleur and the biggest bolt-saving opportunity at 6.4g with a Grade 5 Ti-6Al-4V replacement (2.0g). Dura-Ace R9270 and Ultegra R8170 already use a lighter 3g bolt; titanium saves an additional 1g. Covers the pivot bolt's structural role (parallelogram main shaft), why Shimano left 105 with the heaviest version, thread prep for titanium in aluminum, and torque notes.
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