Quick Specs

• Category: Adult Race Ski Boot
• Flex: 130
• Last: 93 mm
• Fit: Narrow / Race fit
• Liner: World Cup Race Liner (Full Lacing)
• Shell: Formula PU
• Stance: 16°–18° Forward Lean
• Sole: ISO 5355 Alpine Type A

Description & Features

Race ski boot precision defines the Atomic Redster TR F4 130. Built for aggressive racers, this narrow race ski boot delivers maximum power transfer and a locked-in feel for SL and GS. The 93 mm last, Anatomic Toe Box, and Ankle Retention System create a precise, secure fit with strong heel hold and balanced pressure. A Formula PU shell with Power Chassis enhances stability and edge-to-edge response, while adjustable forward lean and cuff alignment help fine-tune stance. The result is consistent control, fast energy transfer, and confidence at speed on race day or in training.

Features

• 130 flex delivers strong rebound and race-level responsiveness
• 93 mm race last provides a precise, low-volume fit
• Power Chassis reduces sole flex for direct energy transfer
• Ankle Retention System improves heel hold and responsiveness
• Dual-Sided Cuff Alignment and Power Control for stance tuning
• World Cup Race Liner with full lacing for a locked-in feel
• Redster AFS Tongue distributes pressure evenly across the shin
• 55 mm Professional Dual Strap enhances rebound and suspension
• Magnesium Elite Buckles provide secure, precise closure
• 0° sole canting and shell rotation for a neutral setup

Specs

• Flex Index: 130
• Last: 93 mm (Race Volume)
• Shell Material: Formula PU Shell / PU Cuff
• Cuff Height: Regular Cuff – All Sizes
• Forward Lean: 16° (Default), 18°
• Ramp Angle: 4°
• Buckles: Magnesium Elite Buckles
• Closure System: 4-Buckle Closure System
• Power Strap: 55 mm Professional Dual Strap
• Liner: World Cup Race Liner
• Liner Features: Redster AFS Tongue, Ankle Retention System, Full Lacing, Dual Velcro Spoiler
• Boot Board: Depth Guide Boot Board
• Shell Technology: TR Wall Thickness, Podium Geometry, Power Chassis, Anatomic Toe Box, 0° Sole Canting, Grind Grid
• Cuff Technology: Dual-Sided Cuff Alignment, Power Control
• Shell Rotation: 0°
• Sole: Redster Solid Sole
• Norm: ISO 5355 Alpine Type A
• Weight: 2,400 g (size 26–26.5)
  

Note: Includes size adjuster, second Power Control screw, liner laces, and liner spoiler.

Fit & Performance Technology

Power Chassis

Reinforces the connection between toe and heel, reducing sole flex and improving energy transfer directly to the ski.

Ankle Retention System

Uses advanced lace routing to enhance heel hold and create a more responsive, connected feel.

Professional Dual Strap

Combines elastic suspension with a static power section for smoother terrain absorption and strong energy transmission.

Formula Plastics

Maintains consistent flex across varying temperatures, delivering predictable performance in all race conditions.

Anatomic Toe Box

Provides a more natural forefoot shape for better balance, comfort, and control without sacrificing precision.

World Cup Race Liner

Offers a close, race-tight fit with minimal seams and full lacing for maximum power transfer and control.