Shimano Titanium Bolt Kit Worth It 105 Ultegra Dura-Ace Weight Savings

You already swapped the carbon saddle. The titanium seatpost clamp is on. The water bottle cage bolts are done. But there is still weight sitting in places most riders never touch — inside the Shimano groupset itself. Steel bolts hold your shifters, brakes, derailleurs, and crank together, and every one of them can be replaced with Grade 5 titanium.

The TiNE titanium bolt kit does exactly that. But the real question is: how much does it actually save, and does it make sense for your groupset?

Three Groupsets, Three Results

Not every Shimano owner saves the same amount. The heavier your stock groupset, the more there is to gain:

If you ride 105, the kit removes over 100 grams — roughly the weight of a carbon water bottle cage. That is not a marginal gain hidden in a single bolt; it is a full component's worth of weight stripped from hardware you already own.

Why 105 Owners Benefit Most

Shimano uses more steel fasteners at the 105 tier than at Ultegra or Dura-Ace. The 105 R7170 groupset starts at 177.3 g across all its serviceable bolts — roughly 30 g heavier than Ultegra and over 60 g heavier than Dura-Ace. That gap is exactly what titanium replaces.

Dura-Ace already ships with lighter alloy bolts in several positions, so there is less steel for the TiNE kit to substitute. That is why the Dura-Ace kit weighs 59.3 g — fewer bolts need replacing — and the total saving lands at 54.4 g.

Practical takeaway: The lighter your stock groupset, the less titanium can remove. 105 riders get roughly double the savings of Dura-Ace riders from the same upgrade path.

What the Kit Actually Covers

Every TiNE Shimano bolt kit replaces the serviceable steel fasteners across three subsystems:

1/ Shifters (STI levers): clamp ring bolts and hydraulic hose locking bolts

2/ Brakes (calipers): hose locking bolts and oil port bolts

3/ Derailleurs: pivot bolts, limit and tension screws, pulley screws, front derailleur bolt and spacer

All bolts are CNC machined from Grade 5 Ti-6Al-4V and anodized in eight colors. They install with standard hex keys — no special tools required.

Stack It With a Frame Bolt Kit

The Shimano bolt kit covers your groupset only. If you ride a Specialized Tarmac SL9, the TiNE SL9 frame bolt kit replaces another 19.7 g of steel across the seatpost clamp, front derailleur mount, bottle cage, and headset — bringing the total groupset-plus-frame saving well above 120 g for a 105-equipped SL9 build.