Shimano STI Lever Clamp Ring Titanium 9.6 g vs Stock 33.8 g (24.2 g Saved)

The clamp ring that secures Shimano STI levers to the handlebar is one of the heaviest single bolts on the entire bike — 33.8 g per pair on 105 R7170 and Ultegra R8170. TiNE's Grade 5 Ti-6Al-4V V-profile clamp rings weigh 9.6 g per pair, saving 24.2 g. That is the largest single-item weight reduction in the entire TiNE Shimano catalog.

The Problem: Heavy Steel Clamp Rings at the Handlebar

Shimano's stock STI lever clamp rings are bulky steel bands that wrap around the handlebar and bolt through the lever body. On 105 R7170 and Ultegra R8170, each pair weighs 33.8 g — roughly the same as a small chainring bolt set. Dura-Ace R9270 uses a lighter design at 21.6 g, and SRAM Red uses 32.4 g. The clamp rings sit at the highest point of the bike, directly under the rider's hands. Every gram here amplifies steering inertia.

The Solution: TiNE V-Profile Titanium Clamp Rings

TiNE replaces the stock steel band with a V-profile titanium clamp ring with arc-face design. The V-profile distributes clamping force across a wider contact area on the handlebar surface, preventing stress concentrations that can carbon-bar damage. The arc-face conforms to the bar's curvature, ensuring even pressure without localized crushing points.

24.2 g at the handlebar — the highest-impact single upgrade. The clamp ring sits at the highest position on the bike, directly under the rider's hands. Weight savings at the handlebar level disproportionately improve steering feel and handling responsiveness. At 24.2 g saved (105/UT), this is the single largest weight reduction in the entire TiNE Shimano titanium lineup — bigger than any individual derailleur bolt, caliper bolt, or cassette lockring.

Grade 5 Ti-6Al-4V, CNC machined, V-profile arc-face design, 8 anodized colors (gold, blue, rainbow, silver, black, pink, green, multi). Each ring: 4.8 g. Pair: 9.6 g. Universal fit for Shimano 105 R7170/Ultegra R8170/Dura-Ace R9270 and SRAM Red clamp rings. The V-profile arc-face protects carbon handlebars from localized stress damage while delivering the largest single-item weight savings in TiNE's catalog.