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Atomic·Ski boots·Race ski boots

Atomic Redster TR F4

A race boot with flex 130 and Atomic's thickest TR shell for powerful skiers who want maximum response.

776 €
1Size
776 €
  • Delivery in 2–5 business days
  • 30-day returns
Ski expert
Not sure about the size? Chat with a ski expert, or call +46 370 33 97 70.
130
Flex
Stable feel for powerful skiers without going to the stiffest option.
Narrow last
Fit
Narrow racing last delivers precise foot placement and balance.
Formula PU
Shell
Temperature-stable shell gives consistent performance in any weather.

About Atomic Redster TR F4 – Race ski boots

The Atomic Redster TR F4 is a boot built for powerful skiers who want maximum response without going up to the stiffest model. With a flex index of 130 and Atomic's thickest TR shell, you get a boot that is stable, compliant and can handle high pressure. Perfect for skiers who find 150 too much.

The shell is made of Atomic's most stable and temperature-resistant Formula Plastics, which provides consistent performance regardless of weather conditions. The Redster TR F4 has the same World Cup DNA as other models in the series, with a narrow 93 mm Racing last, anatomically designed toe box, and a World Cup Race liner that provides direct power transfer.

Under the foot is a Power Chassis that increases torsional stiffness, while the solid sole provides precise contact with the binding. The adjustable AFS tongue can be adapted to different instep shapes, and the Ankle Retention System in the liner ensures the heel stays securely in place for quick response in every turn.

Atomic Redster TR F4, Specifications

  • Last: 93 mm
  • Flex: 130
  • Weight: 2317 g (26.5)
  • Formula PU Shell/PU Cuff
  • Unisex
  • Alpine Norm ISO 5355 - Type A
  • World Cup Race Liner
  • 55 mm Professional Dual Strap

55mm Professional Dual Strap: Strap combines an elastic shock absorbing section with an adjustable static section for more power.

93mm Racing Last: This 93mm narrow last is the choice of DH globe winner Aleksander Kilde.

TR Wall Thickness: The thickest shell material in the Redster family, developed for the larger, stronger athletes.

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.

Fit & last

The last is the boot’s width across the ball of the foot. 100 mm is a medium width and suits most people. If you have a wide foot or high arches, we can spot-heat the shell in the store where it presses. The boot should feel snug when you try it on: your toes touch the front when you stand straight and pull back when you bend your knees. The liner packs out 3–5 mm during the first week, so a boot that feels comfortable in the store will be too big after a week. Always measure mondopoint — boot size has nothing to do with your normal shoe size.

Boot fitting

Buy your ski boots from us and you get free boot fitting for 1 year from purchase. That means we heat-mould the liner and grind or punch the shell at no extra charge. If we need to add materials or products, such as a custom-moulded footbed, you only pay for those — not for the work. You’re welcome to drop into our store at Isaberg, Sweden for up to 1 year after your order is placed.

Shipping & returns

Delivery time: 2–5 business days to Germany, from our warehouse in Hestra, Sweden. If the boot doesn’t fit right, free boot fitting is included for 1 year from purchase. Call +46 370 33 97 70 if you’re unsure before you order.

Atomic Redster TR F4 specifications

CategoryRace ski boots
Skier levelExpert
Flex130
LastNarrow (93 mm)
CuffFormula PU Shell/PU Cuff
LinerWorld Cup Race Liner
Weight (26.5)2317 g
NormISO 5355 Type A
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Choosing ski boots
Your ski boots affect your skiing more than any other piece of equipment — and they’re the hardest to choose online. Below we go through mondopoint, flex, last and what a boot fitting does.
Mondopoint — measure your foot, not your shoe size
Ski boots are sized in mondopoint, which is the length of your foot in centimetres. Stand with your heel against a wall, mark your longest toe and measure. That measurement is your size. Your EU shoe size is a poor starting point because it varies between manufacturers. A ski boot should feel snug when it’s new — the liner packs out 3–5 mm during the first week of skiing.
Flex and what the number means
Flex describes how much force it takes to bend the boot forward. 60–90 is soft and forgiving, 90–110 is an all-round level, 110–130 is stiff for skiers who ski hard, and above 130 is race level. The number isn’t standardised between manufacturers, so a 100 from one brand can feel like a 110 from another. If you’re heavy or ski aggressively, you want a stiffer boot; if you’re lighter or a beginner, you want a softer one.
Last — the width of your foot
The last is the boot’s width across the ball of the foot. Narrow is around 98 mm, medium around 100 mm and wide around 102 mm. A medium last suits most people. If you have a wide foot, a last that’s too narrow isn’t something you get used to — but the shell can be heat-moulded to make room where it’s needed.
Boot fitting makes the difference
Nine out of ten skiers have something adjusted at their first fitting. We analyse your foot, heat-mould the liner and grind or punch the shell where it pinches. A custom-moulded footbed gives better heel hold and less foot fatigue, and is the single biggest improvement you can make without changing boots. Buy your ski boots from us and free boot fitting is included (materials such as footbeds are paid separately), and you’re welcome to drop into the store for up to 1 year after your order is placed.
Socks and fit go together
A thin, knee-high ski sock with no seams across the ball of the foot is the right choice. Thick socks make the boot tighter without making it warmer — it’s the air inside the boot that insulates, and a boot that pinches gives you cold toes. Never wear two pairs.
Frequently asked questions
Ski boots are measured in mondopoint, which is the length of your foot in centimetres. Put your heel against a wall, measure to your longest toe and choose that size. The boot should feel snug when it’s new.
Ski expert
Didn’t find your answer? Call +46 370 33 97 70 or chat with a ski expert.
Atomic Redster TR F4
Select size
776 €