The Polygon Strattos S4D 2025 brings hydraulic disc brakes and Shimano Tiagra 20-speed shifting to a versatile aluminium road bike. Its ALX All-Round frame is paired with a carbon ACX All-Round fork with a tapered steerer for sharper, more precise steering. Shimano Tiagra ST-R4720 levers control both the 2x10 drivetrain and the BR-4770 hydraulic disc brakes, giving powerful, consistent braking in wet and dry conditions. A Shimano Tiagra 50/34T crankset and 12-28T cassette provide a well-spaced gear range for training and long rides. Polygon RD6 disc wheels with 12mm thru-axles add stiffness and security, and the tubeless-ready rims can take tyres up to 62mm wide, with 700 x 28C tyres fitted as standard. Available in sizes XS to XL in White, the Strattos S4D is ideal for riders who want all-weather braking confidence and a road bike that can also handle rougher roads.