RUKO KES-FormD-75°-31.0mm Ahead Stem 31.8mm Clamp Black

For riders building or upgrading a city, trekking, or light mountain bike, the RUKO KES-FormD stem delivers a 75° rise for a more upright, comfortable position. Crafted from sandblasted aluminium 6061 T6, it offers strength and a clean look. The 4-bolt handlebar clamp holds a 31.8 mm bar securely, while the 1 1/8" steerer clamp fits most modern forks. With a 90 mm reach and 40 mm stack height, it provides precise steering and a stable platform for daily commutes or weekend trails.

Key specifications

• Stem type: A-Head
• Handlebar clamp diameter: 31.8 mm
• Steerer clamp diameter: 1 1/8" (28.6 mm)
• Angle: 75°
• Length (reach): 90 mm
• Material: Aluminium 6061 T6
• Colour: Black
• Finish: Sandblasted
• Stack height: 40 mm
• Handlebar clamp type: 4-bolt
• Ergotec safety level: 4
• Weight limit (rider + luggage): 100 kg

Why choose it

The 75° angle raises the handlebar significantly, reducing strain on wrists and lower back. The sandblasted finish resists scratches and hides wear, while the 4-bolt clamp ensures a firm grip on the bar without creaking. Its Ergotec safety level 4 rating means it is tested for demanding use up to 100 kg total weight.

Ideal use cases

• Converting a flat-bar bike to a more upright riding position
• City bikes and commuters where comfort is priority
• Trekking and light MTB setups needing a durable, high-rise stem

Good to know

This stem is designed for A-Head (threadless) forks with a 1 1/8" steerer. Installation requires standard Allen keys and basic bike tools. The 90 mm reach keeps steering responsive without feeling twitchy.