Sidi Rex Motorcycle Boots White/Black/Yellow

Finding a racing boot that fits as precisely as it protects is the challenge every serious rider faces — the Sidi Rex in White/Black/Yellow answers it convincingly. Engineered for professional-level demands, the Rex wraps your foot in a system of adaptive closures, anatomical support structures and breathable materials that keep you comfortable and in control across every session, whether that's a full track day or a long spirited road run.

Key Features

• High-density resin Dual Dial Closure System adjustable from both sides for millimetre-precise, pressure-free fit
• Fibreglass-reinforced nylon exoskeleton stabilises the ankle and foot under hard cornering and braking loads
• TPU protectors absorb impact forces, while dedicated Ankle Support Braces resist dangerous torsional movement
• Asymmetric heel cup channels energy transfer predictably, keeping your foot correctly positioned on the peg
• Replaceable shin plate and slider extend the service life of the boot and simplify maintenance
• Air Ventilation System maintains a steady flow of fresh air to keep core temperature in check during intense riding
• Side slip profile adds grip and stability in lean, reinforcing boot-to-peg contact when it matters most

All-Day Fit You Can Actually Feel

The Rex's Dual Dial Closure System is the centrepiece of its fit philosophy. Adjustable independently from both sides of the boot, the high-density resin dials distribute tension evenly across the instep and shin without creating the pressure points that fatigue your feet after an hour in the saddle. Fine-tuning is fast and intuitive — you can dial in a secure fit at the side of the track without removing your gloves. That consistent, anatomical hold is the difference between a boot you merely wear and one you genuinely forget is there, letting you focus entirely on riding.

Race-Derived Protection Architecture

Every protective element in the Rex has been shaped by the demands of professional racing. The fibreglass-reinforced nylon exoskeleton provides structural rigidity around the ankle without adding unnecessary bulk, while the TPU protectors are positioned at the zones most exposed to impact. The Ankle Support Braces work in concert with the asymmetric heel cup to prevent rotational injury — a critical consideration at track speeds. Both the shin plate and the slider are fully replaceable, meaning the boot's protection remains intact across many years of use rather than degrading the moment one component wears.

Ventilation for High-Performance Riding

The integrated Air Ventilation System channels airflow through the boot continuously, reducing heat build-up during sustained high-intensity riding. On a summer track day, where concentration is everything, the ability to maintain comfortable foot temperature across multiple sessions is a genuine performance advantage. The ventilation architecture is designed to function effectively at the speeds and postures associated with sport and racing riding rather than as a cosmetic feature.

Fitment & Compatibility

The Sidi Rex is a universal motorcycle racing boot suitable for road and track use across all sport, supersport and superbike categories. It is available in whole sizes from 39 through to 48. The White/Black/Yellow colourway is a dedicated variant within the Rex range.

Sustainability Commitment

Sidi is a signatory to the UN Global Compact principles and is actively working towards the UN Sustainable Development Goals. The brand has set a science-based target of a 50% reduction in CO₂ emissions by 2030, with a commitment to Net Zero by 2050.

Specifications

• Brand: Sidi
• Model: Rex
• Colour: White/Black/Yellow
• Closure: Dual Dial Closure System (high-density resin, adjustable from both sides)
• Structure: Fibreglass-reinforced nylon exoskeleton
• Protection: TPU protectors, Ankle Support Braces, asymmetric heel cup, replaceable shin plate, replaceable slider
• Ventilation: Air Ventilation System
• Available sizes: 39–48
• Intended use: Road and track — sport, supersport, racing