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The pivot bolt connects your rear derailleur to the hanger — small, overlooked, heavier than you think.
What Is a Pivot Bolt?
The pivot bolt secures the rear derailleur to the hanger. It threads through the hanger into the derailleur body, letting it pivot backward on impact to protect both derailleur and frame.
Every rear derailleur has one. It is one of the heaviest single bolts on a road bike drivetrain.
How Heavy Is a Stock Pivot Bolt?
Weight varies by groupset:
| Groupset | Stock Pivot Bolt | TiNE Titanium | Savings |
|---|---|---|---|
| Shimano 105 (R7170) | 8.4g | 2.0g | 6.4g |
| Ultegra (R8170) | ~3g | 2.0g | ~1g |
| Dura-Ace (R9270) | ~3g | 2.0g | ~1g |
Shimano 105 R7170 Pivot Bolt
8.4g (stock) → 2.0g (TiNE) –6.4g
8.4g (stock) → 2.0g (TiNE) –6.4g
Why Replace It?
The pivot bolt is a hidden weight-saving opportunity. A TiNE titanium pivot bolt cuts up to 6.4 g — one of the best gram-per-dollar upgrades on a Shimano 105 drivetrain.
Frequently Asked Questions
Do all rear derailleurs use the same pivot bolt thread?
Most Shimano 12-speed road derailleurs use M6 threads. SRAM and Campagnolo may differ — check before ordering.
Will a titanium pivot bolt affect durability?
TiNE pivot bolts use Grade 5 Ti-6Al-4V — as strong as steel at roughly half the weight. Thread it in straight and do not overtighten.
Do I need to remove the derailleur to replace the pivot bolt?
Yes. Shift to the smallest cog, remove the derailleur from the hanger, swap the bolt, and reinstall.
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