Shimano Bolt Kit Weight: 105 vs Ultegra vs Dura-Ace Per-Zone Data

A complete TiNE titanium bolt kit swaps every steel and alloy fastener across your Shimano shifters, calipers, derailleur, and crankset. The results are far more dramatic than most riders expect — especially on 105-equipped bikes.

Shimano ships identical steel hardware on a 105 groupset and a Dura-Ace groupset. The weight difference between kits comes entirely from how heavy each groupset's stock parts are — not from the titanium itself.

Three Groupsets, One TiNE Weight

Biggest Single Savings

On a 105 bike: the rear derailleur pivot bolt drops from 8.4 g to 2.0 g (6.4 g alone), and the center-lock disc brake caps go from 16.4 g to 5 g (11.4 g on two tiny parts). The front flat-mount adapter shrinks from 11.6 g to 7.5 g. These three zones account for over half the total saving.

Version Compatibility

All three kits share the same total titanium weight, but screw shapes differ. Dura-Ace uses a distinct 9270 body bolt where 105/Ultegra use 71/81 body bolts. Buy the version matching your groupset — mix-and-match will not work. Each kit: Grade 5 Ti-6Al-4V, CNC machined, 8 anodized colors. The anodized layer adds surface hardness to prevent galling during installation.