Shimano Rear Derailleur Bracket — Stock vs Titanium Pivot Upgrade

Shimano rear derailleurs bolt to the frame via a mounting bracket. Stock brackets are cast aluminum with a steel pivot screw that tends to seize. Here is how the stock pivot compares to a titanium upgrade.

Stock Shimano Bracket

The factory bracket is cast or forged aluminum with a steel pivot screw. Across 105, Ultegra, and Dura-Ace, bracket plus hardware weighs roughly 113–177 g. The steel pivot alone (~8.4 g) corrodes at the thread interface and can seize into the aluminum body after wet-season riding.

TiNE Pivot Screw Upgrade

TiNE replaces the pivot screw — the fastener most prone to corrosion and weight penalty. Grade 5 Ti-6Al-4V: 2.0 g vs ~8.4 g stock, roughly 6.4 g lighter. The titanium thread resists seizing far better than steel against aluminum, and the cross-section is significantly stronger where the pivot carries load.

Side-by-Side Comparison

Full bolt-set upgrades also cover pivot, limit screws, and barrel adjuster in one package. Combined savings: roughly 54 g (Dura-Ace) to 108 g (105) per groupset.

Shimano derailleur titanium upgrades at tinetech.com