The Shimano Tiagra ST-4703 puts smooth, accurate 3x10-speed shifting and confident braking into a single ergonomic lever, making it an ideal upgrade or replacement for road bikes running a triple chainring drivetrain. Designed as part of the Tiagra 4700 series, these STI (Shimano Total Integration) levers deliver reliable all-day performance for touring, sportive, and endurance road riders.

Highlights

• Integrated shift and brake: STI design combines gear shifting and braking in one lever — no separate shifters needed.
• Reach adjust: Lever reach is adjustable via a 2mm Allen key, allowing a precise fit for hands of any size.
• Optical Gear Display: At-a-glance gear position indicator keeps you informed without looking down at the rear cassette.
• OPTISLICK cables included: Electrically coated cable housing reduces friction and resists corrosion for smooth, consistent actuation.
• Super SLR brake actuation: Short-pull lever geometry with a friction-reducing mechanism delivers responsive, well-modulated braking.
• Lightweight composite construction: Graphite fibre-reinforced plastic bracket body with aluminium main lever keeps weight in check.

Ergonomics and Control

The ST-4703's lever shape is engineered to feel natural in the drops, on the hoods, and mid-ride when you need to shift on a climb. The reach adjust mechanism means riders with smaller hands get the same confident reach to the lever tip as those with larger hands — no compromise needed. The Optical Gear Display lets you glance at your rear gear position at any moment without guesswork.

Cable Technology

Each set ships with Shimano's OT-SP41 derailleur cable and housing, including OPTISLICK-coated inner cables. The uniform, low-friction coating ensures effortless cable movement from the first ride, with excellent durability and corrosion resistance over time — particularly valuable in wet or variable conditions.

Compatibility & Fit

Designed for 3x10-speed road drivetrains. Rear derailleur compatibility is limited to the Shimano RD-4700-GS — these levers use a cable pull ratio specific to Tiagra 4700-series rear derailleurs and will not index correctly with other rear derailleurs, including earlier Tiagra models. Compatible with Shimano Road front derailleurs. Fits standard road drop handlebars (23.8–24.2mm clamp diameter). Brake actuation is Short Pull Super SLR.