ATOMIC REDSTER TR F4 Ski Boots
The Atomic Redster TR F4 is a purpose-built race boot with a powerful 130 flex, delivering World Cup-level precision in a more accessible flex. Its thick, supple shell construction makes it ideal for bigger and stronger athletes who find a 150-flex race boot slightly too stiff, while maintaining the responsiveness and control required for high-level racing.
Built with Atomic’s highly stable and temperature-resistant Formula PU, the Redster TR F4 maintains predictable flex characteristics across a wide range of temperatures. The narrow 93 mm Racing Last precisely positions the foot, while the anatomically shaped toe box provides additional room around the big toe for improved positioning and balance.
The Power Chassis reinforces the area between the toe and heel to increase torsional stability and improve edge grip. Podium Geometry combines forward lean, ramp angle and foot positioning to place the skier in an athletic race stance, while 0° Sole Canting provides a neutral starting position for precise alignment and boot fitting.
Inside, the premium World Cup Race Liner features Atomic’s Ankle Retention System for a secure heel hold and maximum responsiveness. The adjustable Redster AFS Tongue can be repositioned for different foot shapes and instep heights, while Magnesium Elite Buckles and a 55 mm Professional Dual Strap provide a powerful and precise closure.
Last / Fit
93 mm Racing Last – Narrow / LV
Shell / Cuff
Formula PU / PU
Color
Red Tension / Black / Magenta
Key Features
TR Wall Thickness
The thickest shell material in the Redster family, developed for the larger, stronger athletes.
Podium Geometry
This combination of forward lean, ramp angle, and foot placement puts the skier in an athletic stance.
Power Chassis
Added reinforcement between toe and heel underfoot improves torsional stability for improved grip.
Anatomic Toe Box
Anatomically shaped forefoot opens up room in the big toe for better foot positioning and balance.
0° Sole Canting
With a zero-degree sole, your alignment starts in a neutral position for easy assessment and adjustment.
Grind Grid
Interior grid pattern on the shell aids in identifying areas for modification.
Depth Guide Boot Board
Grooves in the boot board help identify the depth that boot fitters can safely remove material.
Dual-Sided Cuff Alignment
Allows for lateral cuff angle adjustment to match the angle of the leg for increased comfort and control.
Power Control
Allows for forward lean adjustment and an extremely solid connection of the cuff to the shell.
Formula PU Shell / PU Cuff
Retains flex characteristics across a wide range of temperatures for predictable performance.
World Cup Race Liner
Developed with the world’s fastest racers, it uses the finest materials for the ultimate fit and performance.
Redster AFS Tongue
The Adaptive Fit System (AFS) Tongue can be repositioned to accommodate different foot shapes and instep heights.
Ankle Retention System
A special lace loop on the liner provides increased ankle hold and delivers maximum responsiveness.
55mm Professional Dual Strap
Strap combines an elastic shock absorbing section with an adjustable static section for more power.
Magnesium Elite Buckles
Ultra-low profile and Atomic's most durable buckle yet, specially shaped to deflect on-coming hits.
4-Buckle Closure System
Individual buckles allow you to independently customize the pressure distribution at each location.
Redster Solid Sole
Redster Solid Sole provides a precise and sensitive interface with alpine bindings.
Specifications
Flex
130
Last / Fit
93 mm Racing Last – Narrow / Low Volume
Shell Technology
TR Wall Thickness
Shell / Cuff Material
Formula PU Shell / PU Cuff
Cuff Height
Regular Cuff – All Sizes
Boot Sole
Redster Solid Sole
Forward Lean
16° (Default) / 18°
Ramp Angle
4°
Norm
Alpine ISO 5355
Weight per Boot
2317 g (MP 26/26.5)
