How Much Do Specialized SL9 Frame Bolts Weigh? (Titanium Upgrade Guide)

Shimano and SRAM sweat the grams on groupsets. But the bolts holding your seatpost clamp and bottle cages to a Specialized SL9 frame? Steel from the factory. Here's what those eight bolts weigh, what sizes they use, and how much you can save with titanium.

SL9 Frame Bolt Breakdown

Location	Thread	Qty
Seatpost clamp bolt	M4	1
Front derailleur hanger bolts	M4	2
Bottle cage bolts	M5	4
Headset top cap bolt	M3	1

Together, those eight steel bolts total 19.7g. Not a headline number — but they're frame hardware, not drivetrain parts. Free grams sitting on the carbon.

Titanium vs Steel: What Changes

	Stock steel	Ti-6Al-4V	Saved
All 8 bolts	19.7g	8.3g	11.4g

Grade 5 titanium (Ti-6Al-4V) has roughly 40% lower density than steel at equivalent tensile strength. Applied to the SL9's eight frame bolts, that means cutting the total weight by more than half — 11.4g removed from hardware most riders never think about touching.

Frame Bolts Are Not Groupset Bolts

These eight bolts mount things to the frame (cages, clamps, hangers). Groupset bolts live inside your derailleurs and shifters. They use different threads, different locations, and don't overlap. If you've already swapped groupset hardware to titanium, frame bolts are an entirely separate category — installing both covers different fasteners with no redundancy.

Corrosion and Install Notes

Steel bolts in aluminum rivnuts inside a carbon frame create a galvanic pair — sweat and road spray accelerate corrosion in blind holes over thousands of kilometers. Titanium sits far closer to aluminum on the galvanic scale, substantially reducing this risk. A light dab of anti-seize on threads before install is standard practice with titanium and eliminates any remaining concern. Torque to the same values you'd use for the original steel bolts. The swap takes under ten minutes with a basic Allen key set.

TiNE titanium SL9 frame bolt kit at tinetech.com