Sidi AERON MTB Cycling Shoes Black Size 42.5

The Sidi AERON Black MTB cycling shoes size 42.5 are designed for riders who need a more precise fit than standard full sizes provide. The half-size construction improves foot positioning, stability and comfort during long XC races and marathon MTB rides.

The ripstop upper with rubber reinforcements protects the foot on technical terrain while maintaining a lightweight, race-focused silhouette. Dual NUUN 001C aluminum dials allow fast and accurate fit adjustment on the move. The Firmor X internal support system stabilizes the foot during climbs, accelerations and high-cadence efforts.

The UNUM Ergo anatomical tongue distributes pressure evenly to reduce hot spots on long rides. A full carbon X2FC outsole with stiffness index 11 ensures efficient power transfer, while rubber inserts provide added traction on steep and slippery sections. The tool-free adjustable heel cup allows the Sidi AERON Black 42.5 to be precisely tuned for confident, race-ready performance.

Technical specification:

• Model: Sidi AERON

• Size: 42.5

• Colour: Black

• Upper: Ripstop material with rubber reinforcements

• Closure: Dual NUUN 001C aluminum dials

• Fit system: Firmor X + tool-free adjustable heel cup

• Tongue: UNUM Ergo anatomical

• Outsole: X2FC full carbon with rubber inserts

• Stiffness index: 11

• Cleat adjustment: Wide adjustment range

• Replaceable parts: Heel cup, NUUN 001C dials, studs

• Intended use: MTB / XC

Shipping:
We ship within Poland, across the entire European Union, and worldwide.