Lange RX 100 LV (2022) Review: A Low-Volume Ski Boot for Narrow Feet

Introduction

The Lange RX 100 LV (2022) is a low-volume alpine ski boot built around a 97 mm last and a 100 flex. Those two numbers tell most of the story: the shell is shaped for narrower feet and thinner lower legs, and the flex sits in a moderate range rather than at the aggressive end of the scale.

For skiers who have spent seasons fighting a boot that feels roomy in the forefoot or loose around the ankle, that combination is the point. The RX 100 LV is designed to hold the foot closer to the shell, and that is where a more precise, more direct feel on snow comes from.

Who This Boot Is For

This boot is aimed at a fairly specific skier. If you have a narrower forefoot, a lower-volume foot, or a thinner lower leg, the RX 100 LV is built for that shape. It also suits skiers who want a comfortable, approachable flex rather than something highly aggressive.

That makes it a strong contender for taller teenagers with skinnier legs and narrower feet, and for adults who simply need a tighter, more precise fit through the forefoot and ankle. It is less relevant if you have a wider foot or a higher-volume lower leg, because the shell is deliberately low volume.

Main Strengths

The headline strength is the fit geometry. Because the plastic is lower volume, your foot sits closer to the shell of the boot, which translates into a more precise fit and better performance. The RX 100 LV also carries the classic Lange heel hold, so the heel stays locked in place through the turn.

Inside, the Dual 3D Liner Sport uses a softer, more approachable foam. That keeps the boot comfortable while the lower-volume shell does the work of holding the foot securely, so it feels easy to wear but still connected.

Underfoot, Lange fits a stiffer polyurethane boot board. It adds a more direct connection to the snow without stiffening the shell of the boot or requiring a denser liner, so you gain feel without pushing the flex rating higher.

Shell, Liner, and Buckle Details

The RX 100 LV uses a full polyurethane shell and cuff, with GripWalk soles pre-installed. For customization, there are two adjustment screws at the back of the boot plus upper cuff alignment, which lets a fitter tune cuff position and stance.

Closure comes from four micro-adjustable buckles for fine tuning, and two macro-adjustable catches on the upper cuff. If you have a lower-volume leg, moving those catches to the tighter notch helps the cuff hug the leg. The power strap reinforces that, cinching the lower leg to the boot for a better connection and a more efficient transfer of energy from your body to the edge of the ski.

Things to Consider Before Buying

The 100 flex is moderate, and that is by design. If you want a very aggressive, high-flex boot, this is not that boot. It is aimed at skiers who prefer a more manageable flex rather than something stiff and demanding.

The other consideration is fit shape. The low-volume shell and 97 mm last are the foundation of the boot’s performance, so they are also the limit. The adjustment hardware helps refine the fit, but it works best when the shell shape already matches your foot. If you have a wide forefoot or a high-volume lower leg, a different last is likely the better starting point.

Getting the Fit Right

Because the RX 100 LV is built around a narrow, low-volume fit, the setup process matters. Start with the macro-adjustable catches on the upper cuff, which can be moved to a tighter notch to hug a thinner lower leg. Then use the four micro-adjustable buckles to fine-tune pressure across the instep and forefoot.

The two rear adjustment screws and the upper cuff alignment allow further tuning of cuff angle and stance. The power strap should be cinched down so the lower leg connects firmly to the boot. Working through these adjustments in order, ideally with a bootfitter, is the most reliable way to get the shell, liner, and cuff all working together.

Buying Advice

If your priority is a precise fit for a narrower foot and a thinner lower leg, the RX 100 LV is worth trying on. It pairs a low-volume 97 mm last with a 100 flex, a softer Dual 3D Liner Sport, and a stiffer polyurethane boot board, so it delivers connection without demanding an aggressive stance.

Consider it if you have struggled with boots that feel too roomy in the forefoot or too loose around the ankle. Skip it if you need a wider fit or a stiffer flex, since those sit outside what this boot is designed to do. Fit is the deciding factor here, so plan on trying the boot with help from a fitter who can set the cuff alignment and buckles correctly.

Conclusion

The Lange RX 100 LV (2022) is a focused boot: 97 mm last, 100 flex, low volume throughout. For skiers with narrower feet and thinner lower legs who want comfort and precision without an aggressive flex, it is a sensible choice. Match it to your foot shape and it will do its job well.