Black Triathlon / TT Bike Stems

Match stem length and angle to your reach and stack; stems commonly span 80–140mm with rise or negative angles from -10° to +20°. Choosing lengths in 5mm increments helps fine-tune position so you avoid overextension or a cramped aero posture.

Carbon offers lighter weight and vibration damping while aluminum brings strength and crash resistance; carbon models often weigh in the 100–250g range. If damping on long races matters, look at models like the SL Speed Carbon B2, but alloy options such as the Service Course SL B2 give affordable adjustability.

Integrated one-piece combos deliver a cleaner aero profile and seamless cable routing for aggressive TT setups, with examples like the HB18 Carbon 1-Piece built for a low, unified cockpit. They improve aero efficiency but can add mass as a full unit, so confirm fit and intended use before committing.

Adjustable stems let you fine-tune stack and reach for different race distances, often offering flip-flop designs or angle ranges from -10° to +20°. That flexibility makes it easier to find a more comfortable, sustainable position for Ironman efforts without giving up aero on shorter time trials.

Check clamp sizes—most stems expect a 31.8mm handlebar clamp and a 1-1/8 inch steerer—and follow listed torque ratings, typically around 5–8Nm, to avoid damaging components. Also note construction: carbon stems need careful torque control, whereas alloy stems are generally more forgiving in installation and crashes.