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FISCHER RC4 Podium LT 90
The FISCHER RC4 Podium LT 90 are junior race ski boots with a flex index of 90, a narrow 95 mm RV (Race Vol) racing shell and a construction developed for younger, lighter and smaller racers who need the precision of a genuine race boot while still being able to properly load the shell and actively use its flex. The model belongs to Fischer’s RC4 racing line and is designed both for ambitious young racers beginning their competitive development and for more advanced juniors who require specialized equipment for systematic race training.
A defining feature of this model is its lightweight construction combined with a nimble 90 flex. It is designed to allow younger and lighter athletes to work effectively with the front of the boot, generate the necessary pressure into the skis and achieve higher speeds without having to overcome an excessively stiff shell. This is therefore not a conventional junior performance boot, but a genuine race construction with stiffness adapted to the physical capabilities of lighter racers.
Another important element is the junior racing last with a width of 95 mm – RV (Race Vol). According to Fischer, it provides strong heel retention and the necessary support while maintaining enough space in the toe box to prevent unnecessary compression of the toes. Precision is further supported by the Low-Tolerance Race Cuff, RD20 Race Canting, Podium LT Comp liner, four Podium RD20 buckles and a 35mm Velcro Power Strap.
Who are these ski boots for?
The FISCHER RC4 Podium LT 90 are designed primarily for junior racers and young athletes developing their racing technique who already require a genuine race construction but are not yet able to effectively utilize the stiffer flex of higher-level models.
This model is suitable for skiers who:
- actively race or regularly train racing technique
- require a junior-specific race construction
- are looking for a 90 flex suitable for lighter and smaller racers
- need a narrow 95 mm Race Vol fit
- require secure heel retention and precise foot control
- want direct power transfer between the leg and ski
- will benefit from Low-Tolerance Race Cuff and RD20 Race Canting
- need the possibility of professional race-fit refinement
- prefer a specialized race boot over a conventional junior performance model
- want equipment that supports the continued development of racing technique
How do the ski boots perform on snow?
The RC4 Podium LT 90 are focused primarily on precision, fast response and efficient power transfer, while their flex is specifically configured so that a lighter junior racer can work with the boot effectively.
Fischer describes the flex as light and nimble. With the correct boot choice, a young racer does not have to fight against an excessively stiff shell and can generate pressure through the front of the boot more effectively. The combination of the Low-Tolerance Race Cuff and precise canting is focused on direct power transfer and the control required for race skiing.
On snow, you can expect:
- precise transfer of skier input to the skis
- secure heel retention
- a narrow race fit
- fast response to changes in pressure
- a direct connection between the leg, boot and ski
- flex adapted to lighter and smaller racers
- precise lateral control
- minimal unwanted play around the cuff
- efficient pressure through the front of the boot
- genuine race character without unnecessarily high stiffness
How to read the parameters
Flex index 90
The 90 flex of the RC4 Podium LT 90 needs to be considered in the context of its junior race construction. It is not a figure that determines the performance level of the boot on its own. What matters is that Fischer combines this flex with a narrow 95 mm Race Vol shell, racing cuff, canting and other elements typical of a specialized race boot.
For a lighter or smaller racer, a correctly selected flex can be more effective than a significantly stiffer shell that the athlete is unable to load properly. The 90 flex allows the skier to work more actively with the boot and transfer pressure efficiently to the skis.
The 90 flex supports:
- active engagement with the front of the boot
- efficient pressure transfer
- fast response during edge changes
- better use of a lighter racer’s strength
- precise control without excessive stiffness
- progressive development of proper racing technique
Flex indexes are also not completely standardized between manufacturers, so the value of 90 should always be assessed together with the shell construction, race fit and overall purpose of the model.
Shell width 95 mm – RV (Race Vol)
The FISCHER RC4 Podium LT 90 use a narrow 95 mm – RV (Race Vol) racing shell. This is a race fit focused on precise foot retention and reducing unwanted movement inside the boot.
Fischer also emphasizes the specific junior racing last, which is designed to provide strong heel retention and the necessary support without unnecessarily crushing the toes. The toe box therefore maintains enough space to combine race precision with appropriate positioning of a junior foot.
The narrow RV fit supports:
- precise foot positioning
- secure heel retention
- reduced movement of the foot inside the shell
- fast transfer of movement to the skis
- more precise lateral control
- the control required for race skiing
With a racing boot this narrow, correct sizing is particularly important. Professional bootfitting is recommended for achieving the best possible result.
Technologies
Grindable Bootboard
Grindable Bootboard allows the internal bootboard to be professionally worked on and modified during bootfitting according to the requirements of the individual racer.
In a specialized race boot, this possibility for individual refinement is important because it allows the final fit and foot position to be adjusted more precisely without changing the fundamental character of the shell.
Lace Liner
Lace Liner means that the racing liner can be laced.
Lacing allows the liner to wrap more precisely around the foot even before the outer shell is closed and supports a more stable connection between the foot and the boot. In a race construction, this helps reduce unwanted movement and creates more precise contact between the foot, liner and shell.
Race Code
Race Code identifies technologies and construction elements derived from Fischer’s racing development.
On the RC4 Podium LT 90, Race Code forms part of the race-oriented construction and emphasizes the technical focus of the model. Race Code itself, however, should not be interpreted as confirmation of any specific racing homologation or certification – no such approval is specified in the supplied information.
TPU Cuff & Shell
TPU Cuff & Shell means that TPU is used in both the shell and cuff construction.
This construction forms the structural basis for the boot’s flex, support and race-oriented response. On the RC4 Podium LT 90, it is combined with a 90 flex and other racing elements to create a setup suited to the needs of lighter and smaller athletes.
Low-Tolerance Race Cuff
Low-Tolerance Race Cuff uses a racing cuff designed with minimal constructional play.
Reducing unwanted play between individual components helps create a more direct connection between movement of the leg and response of the shell. The result is more precise lateral control and more direct power transfer, both of which are particularly important during dynamic race skiing.
RD20 Race Canting
RD20 Race Canting is a racing system designed for working with cuff alignment and the racer’s stance.
It allows the race setup to be individually refined according to the needs and position of the specific skier. The exact adjustment range and mechanism are not specified in the supplied information, so they should not be described in greater technical detail.
Race Connected Fit
Race Connected Fit forms part of the liner system and race-oriented fit.
It is focused on creating a precise connection between the foot, liner and shell so that the racer’s movements can be transferred efficiently into the boot and subsequently to the skis. On the RC4 Podium LT 90, it complements the narrow 95 mm Race Vol shell and Podium LT Comp liner.
Podium RD20 junior race construction
The RC4 Podium LT 90 use a Podium RD20 shell construction complemented by TPU Cuff & Shell, Grindable Bootboard, Race Code and RD20 Race Canting. This is therefore not simply a junior boot with a higher flex value, but a complete racing platform focused on precision and individual setup.
Low-Tolerance Race Cuff further supports direct power transfer and control, while the 95 mm RV (Race Vol) shell provides the narrow foot retention expected from a racing boot.
The model is available in sizes 21.5–26.5 and comes in yellow/yellow. The manufacturer code is U11122, the product code is N22000575, and the model is from the 2026/2027 season.
Podium LT Comp and Race Connected Fit
The Podium LT Comp liner matches the racing purpose of the model and, together with Race Connected Fit, creates a system focused on a precise connection between the foot and shell.
The construction also includes Lace Liner, allowing the liner to be laced. This makes it possible to stabilize the foot even before the outer shell is closed and create a more precise connection throughout the entire boot.
At the same time, the junior racing last is designed to provide secure heel retention and the necessary support while maintaining sufficient room around the toes. This is particularly important for young racers who require the precision of a race boot without unnecessary compression of the front of the foot.
Four Podium RD20 buckles and 35mm Velcro Power Strap
The RC4 Podium LT 90 use four Podium RD20 buckles, which secure the shell and stabilize the foot in a race-oriented position.
The upper section of the boot is complemented by a 35mm Velcro Power Strap. It helps secure the cuff around the leg and works together with the four-buckle system to create a stable connection between the racer and the boot.
Unlike the RC4 Podium LT 110, PHATT MAXX technology and a 55mm Phatt Maxx Race strap are not specified for this model. According to the technical information, the RC4 Podium LT 90 uses a standard 35mm Velcro strap, reflecting the specific configuration of this model.
ISO 5355 solid sole
The model uses an ISO 5355 solid sole with a specified sole length of 294 mm.
It is a solid sole conforming to the stated ISO 5355 standard. Its construction fits the overall racing concept of the model, which is focused on precision and a direct connection between the boot and the ski equipment.
The 294 mm value is listed in the manufacturer’s technical information as the sole length. However, because the supplied data does not specify which particular boot size this measurement applies to, it should not automatically be considered valid across the entire size range of 21.5–26.5.
Flex 90 in a junior race boot
The 90 flex is one of the defining characteristics that gives the RC4 Podium LT 90 its specific position among junior racing boots. The construction retains the elements of a genuine race boot, while the stiffness is adapted to lighter and smaller athletes.
This is particularly important for young racers because an excessively stiff shell does not automatically provide better control. If the skier cannot properly load the boot, excessive stiffness may instead limit the ability to work actively with pressure and use natural movement when controlling the skis.
The RC4 Podium LT 90 therefore combine a 90 flex with a 95 mm Race Vol shell, Low-Tolerance Race Cuff, RD20 Race Canting, Podium LT Comp and Race Connected Fit. The result is a specialized junior racing boot rather than a conventional performance model.
Comparison with the FISCHER RC4 Podium LT 110
Compared with the RC4 Podium LT 110, the main difference is the lower flex. The LT 90 is better suited to younger, lighter or less physically powerful racers who would not yet be able to use the stiffer 110 flex effectively.
Both models retain important racing elements including 95 mm – RV (Race Vol), Low-Tolerance Race Cuff, RD20 Race Canting, Grindable Bootboard, Race Code and Race Connected Fit. The LT 90 is therefore not a recreational alternative to the LT 110; rather, its construction is configured for racers with different physical requirements.
There are also differences in specific components. According to the supplied technical information, the RC4 Podium LT 90 uses the Podium LT Comp liner and a 35mm Velcro Power Strap, while the LT 110 features the Podium LT Race liner and a wider Phatt Maxx Race 55mm strap.
Comparison with conventional junior performance boots
Compared with conventional junior performance ski boots, the RC4 Podium LT 90 are considerably more specialized. The difference is not limited to the flex value but extends to the complete construction.
The 95 mm RV (Race Vol) shell, Low-Tolerance Race Cuff, RD20 Race Canting, Grindable Bootboard, Race Code, Race Connected Fit and Podium LT Comp create a racing platform focused on precise control, direct power transfer and the possibility of individual refinement.
Conventional junior performance boots are generally designed with greater emphasis on comfort, easier entry and more versatile use. The RC4 Podium LT 90 have a different priority – providing a young racer with the precision and control required for systematic development of racing technique.
Why choose the FISCHER RC4 Podium LT 90?
The FISCHER RC4 Podium LT 90 are an excellent choice for younger, lighter and smaller racers who already need a genuine race construction but can make better use of a nimble 90 flex than a stiffer racing shell. The narrow 95 mm Race Vol fit provides precise foot control, the junior racing geometry supports secure heel retention, and the Low-Tolerance Race Cuff together with RD20 Race Canting helps create a direct connection between the racer’s movements and the response of the skis.
The Podium RD20 construction, TPU Cuff & Shell, Grindable Bootboard and Race Code underline the specialized racing focus of the model, while Podium LT Comp, Lace Liner and Race Connected Fit support precise foot positioning. Four Podium RD20 buckles and the 35mm Velcro Power Strap complete the secure closure of the boot.
For a junior racer who needs a narrow 95 mm race fit, direct power transfer and precise racing control while also requiring a flex appropriate for their weight and physical capabilities, the FISCHER RC4 Podium LT 90 are a highly specialized solution for the continued development of speed, technique and confidence in race skiing.
Procut classification
| For whom: | Junior |
| Type of ski boots: | Race |
| Type of skier: | Racer |
| Ski boot flex index: | 70-100, 90-120 |
| Boot Width: | 95 |
Documents
Technologies
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Grindable Bootboard
Grindable Bootboards were specifically engineered to allow boot fitters to easily modifiy the height and angle of the bootboard. Dimples on the surface of the bootboard provide a reference point so that bootfiters can control and standarize their handiwork
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Lace Liner
Lace-up liner for better walking performance and for accurate control.
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Race Code
Seal of quality RACE CODE is a sign of the highest levels of preciion from the company Fischer. Development team of Fischer company uses valuable suggestions from athletes and ensures that comments will be converted into technological innovation.
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TPU Cuff & Shell
Thermoshape polyurethane (TPU) material is the benchmark and industry standard for top race products, as it offers superior ski boot suspension compared to polyamid or polypropylene mixtures. TPU makes for a phenomenal ski experience due to the rebound and energy transfer characteristics. ZoneFit and Vacuum moldable at 120° C.
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Low-Tolerance Race Cuff
This skeletal geometry of the Podium RD and LT provides the perfect support towards the rear to handle heavy racing overloads. Power transfer to the ski is maximized.
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RD20 Race Canting
The lastest generation of race canting is designed to reduce the tolerance between cuff and shell of the boot, allowing for maximum power transfer and overall control. Available in 2 and 3 point asymmetrical versions to enable cuff alignment tuning. Please see Spare Part item: U78321 / U78322
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Race Connected Fit
The precisely integrated components of the liner and shell improve the boot's overall fit and the effectiveness of the AFZ liner.
Technical description
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Shell
Podium RD20, TPU Cuff & Shell, Grindable Bootboard, Race Code, RD20 Race Canting -
Inner boot
Podium LT Comp -
Liner Technology
Race Connected Fit -
Flex index
90 -
Skeleton width
95 mm - RV (Race Vol) -
Closure system
4 buckles (Podium RD20) -
Cuff Technology
Low-Tolerance Race Cuff -
Power strap
35mm velcro -
Sole
ISO 5355 solid sole (Sole length 294mm) -
Model
RC4 -
Sizes
21.5-26.5 -
Color
yellow/yellow -
Product code
U11122
Other
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Product code
N22000575
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