Sidi Rex motorcycle racing boots in white, black and yellow colourway 360° — drag me
Air Vents
02 · Data & docs

The facts.

Technical data
BrandSidi
ModelRex
ColourWhite/Black/Yellow
Closure systemDual Dial Closure System, high-density resin, adjustable from both sides
StructureFibreglass-reinforced nylon exoskeleton
ProtectionTPU protectors, Ankle Support Braces, asymmetric heel cup, replaceable shin plate, replaceable slider
VentilationAir Ventilation System
Available sizes39, 40, 41, 42, 43, 44, 45, 46, 47, 48
Intended useRoad and track — sport, supersport, racing
DescriptionThe whole story

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
06 · Complete the look

Head to toe.

Auto-matched to this helmet's sector — Racing
Head to toeAuto-filled from the Racing sector
01HEADA lid to match this look
Nexx X.RALLY Raid White Neon Advent...
FCFA337,300Tap to add
Nexx X.RALLY YUMA White Neon Advent...
FCFA269,900Tap to add
Nexx X.WED3 KEYO White Neon Adventu...
FCFA337,300Tap to add
02TORSOOne-piece leathers — matched colours
Dainese Audax D-ZIP One-Piece Leath...
FCFA788,900Tap to add
Dainese Misano 3 Perf. D-AIR® One-P...
FCFA1,095,800Tap to add
IXON Vortex 3 One-Piece Leather Suit
FCFA431,800Tap to add
03HANDSRace gauntlets with sliders
Dainese Full Metal 7 Racing Leather...
FCFA227,200Tap to add
RST Pro Series GP D3O Motorcycle Le...
FCFA91,100Tap to add
Seventy Degrees Aspen Light All-Sea...
FCFA35,100Tap to add
04FEETDone — the reason you’re here
Sidi Rex Motorcycle Boots White/Bla...
FCFA211,000On your feet
05PROTECTIONOptional — chest & spine
Dainese Pro-Armor Back Long 2.0 Bac...
FCFA74,200Tap to add
Dainese Pro-Armor Back Short 2.0 Ba...
FCFA74,200Tap to add
Dainese Pro-Armor Chest 1PC L2 Ches...
FCFA30,300Tap to add
07 · Support

Questions, one topic at a time.

Estimate your shipping

Get the real shipping cost for this item to your address — the same rates as checkout.

Pick your countrySame rates as checkout

Choose a destination and hit Estimate — we fetch the live rates for this item.

How long does delivery take?

We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.

How much does shipping cost?

Your exact shipping cost is calculated by destination and weight and shown at checkout before you pay — no hidden fees. Express delivery is selectable at checkout where available.

Do you ship to my country?

Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.

Will I have to pay customs or import duties?

Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.

How can I track my order?

As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.

What if an item is out of stock?

On out-of-stock items you can request a delivery time or leave your email to be notified the moment it returns — just use the notification box on the product.

Didn’t find your answer?

Our team will personally help you choose the right gear or part — around 24h for a reply.