THM Tibia Stem

The THM Tibia Stem is a full-carbon road stem engineered around a single discipline: eliminating every gram that doesn't earn its place. At 78g for the 100mm length and no more than 87g for the 120mm, the Tibia achieves that weight without compromising the structural integrity you expect from a component this close to your steering.

THM keeps the carbon intact throughout — no holes drilled, no threads cut into the material. The titanium and aluminum hardware is molded into the structure rather than machined through it, which protects the layup under load and means fasteners are replaceable if damaged. The faceplate is sculpted with recessed mounting bolts to reduce frontal area, and the raw carbon finish skips the clear coat entirely — a small but deliberate weight saving. A light satin polish is all it needs if you want a cleaner look. The ±6° angle and 31.8mm bar clamp cover the standard road fitting, and the faceplate is designed to accept a direct computer mount through its slot, keeping your cockpit clean without adding a bar clamp.

THM Tibia Stem Specs at a Glance

• Weight: 78g (100mm), up to 87g (120mm) ±5%
• Bar clamp diameter: 31.8mm
• Steerer clamp: 1-1/8"
• Stem angle: ±6°
• Available lengths: 80mm, 90mm , 100mm, 110mm, 120mm
• Stack height: 40mm
• Hardware: Titanium and aluminum, replaceable