Nike Free RN Flyknit 2018: review, price and alternatives

The Nike Free RN Flyknit 2018 was designed for runners seeking a light, flexible feel that stays close to the foot’s natural movement. Its knitted construction, snug fit and highly flexible sole place it in a very specific category: short, easy runs rather than long or demanding training sessions.

The men’s version launched at $120 and weighed 7 ounces, around 198 grams, in a men’s size 10. The technical sheet also listed a 7.5-millimeter offset, with 14 millimeters under the forefoot and 22.5 millimeters under the heel. These figures explain its character: a very light, flexible shoe with limited protective structure.

A shoe made for short runs and everyday movement

The Nike Free family has always followed a simple idea: reduce the feeling of wearing a rigid platform under the foot. In this edition, the sole was designed to expand and contract with each landing, like a grid that follows toe flexion and toe-off. The result is not intended to isolate the runner from the ground, but to make the foot’s movement more noticeable.

This approach works best over short distances. A 20- or 30-minute run on clean asphalt highlights the freedom of movement, low weight and quick transition. Once fatigue builds and impacts accumulate, the limited protection becomes clearer. A natural ride does not automatically mean enough cushioning for every runner.

The shoe also works as everyday footwear for travel and light mobility sessions. Its collapsible design takes up little room in a backpack and the upper compresses easily. In that mixed role, alternating walking with short jogs, the concept makes more sense than during half-marathon preparation.

Flyknit and the sock-like fit

The upper uses Flyknit, a knitted structure that reduces seams and combines denser sections with more open areas. In the 2018 edition, Nike added more stretch yarns than in previous versions to improve adaptation around the foot. The initial sensation is enveloping, especially around the heel and midfoot.

The fit does not rely only on the fabric. Flywire technology integrates cables into the lacing area to secure the midfoot when the laces are tightened. This combination holds the foot without adding a heavy frame. Support comes from the interaction of stretch, lacing and heel shape, rather than from a traditional support piece.

The trade-off is that the fit may feel too tight for wide feet or runners who prefer extra room in front of the toes. Nike originally recommended ordering half a size up because the shoe fitted small. That advice matters even more when buying older pairs through resale platforms, where trying them on is not always possible.

Ventilation and comfort in warm weather

The open knit on the sides helps air circulate. In hot conditions, the instep feels less enclosed than it does in a conventional mesh shoe, while the material adapts without creating a rigid shell around the toes. In warm cities, this can make a difference during long walks or short sessions.

Ventilation has a cost, however. The upper provides less protection from cold, rain and dust than a more closed design. Breathability should not be confused with durability: Flyknit prioritizes contact and airflow over external protection.

The soft interior reduces the need for thick socks and adds to the feeling of continuity between foot and shoe. Even so, a tight fit can create pressure across the instep if the laces are pulled too firmly. The lacing should hold the foot without turning the knit into a compression band.

Flexible sole, traction and ground feel

The outsole has a segmented pattern that encourages forefoot flex and allows the shoe to follow lateral movements. A rounded heel helps the landing move forward smoothly, while high-wear areas receive additional texture to improve traction.

On dry asphalt, pavements and compact urban paths, grip is suitable for its intended use. The flexible platform transmits information from the ground and makes changes of direction easy to feel. Wet surfaces require more caution because a highly flexible outsole does not provide the same safety margin as a daily training shoe.

It is not designed for technical trails, loose gravel or root-covered ground. The tread is not deep enough for trail running and the upper lacks protection against impacts. It can work well in an urban park, but its limitations appear immediately on uneven mountain terrain.

Midsole and cushioning feel

The midsole provides moderate protection, measuring 22.5 millimeters at the heel and 14 millimeters at the forefoot. The 7.5-millimeter offset is not extreme, although the overall feel is closer to a flexible minimalist shoe than to a heavily cushioned daily trainer.

The foam is not designed for explosive response or pronounced energy return. Its strength lies in allowing the foot to move naturally while keeping the shoe light. During a short run, the runner feels the mechanics of the landing more than a bounce from the midsole. The cushioning supports the stride but does not replace the foot’s work.

This behavior may suit runners already used to flexible footwear. Someone coming from a tall, soft and highly protective shoe may find the transition abrupt. The change should be gradual, alternating short sessions while monitoring the calves, Achilles tendon, plantar fascia and lower legs.

Who should consider it and who should not

The best match is an experienced runner seeking a light shoe for drills, very short recovery jogs or technique work. It can also suit daily commuting, warm-ups and strength sessions where a flexible, unobtrusive base is useful.

Runners who cover high weekly mileage, need substantial protection or require marked stability will probably prefer conventional training shoes. The model does not include features intended to strongly control pronation or provide a particularly broad base. Its philosophy favors foot freedom, not correction of a specific running pattern.

Beginners should be especially cautious. Its lightweight appearance may suggest an easy starting shoe, but the flexibility demands work from the foot and calf muscles. Comfort during the first few minutes does not guarantee that the body will tolerate a long session, particularly when technique deteriorates with fatigue.

Sizing, wear and buying a discontinued model

Sizing is one of the delicate points. The recommendation to go up half a size came from the product page itself, which described the fit as small. When looking for a used pair, check the internal length, upper condition and conversion between US, UK and European sizing. The same label does not always mean the shoe will feel the same after years of wear.

The age of the product also matters. A shoe manufactured in 2018 may have lost elasticity even if it is unworn. Foam changes with time, rubber can harden and the knit may deteriorate after exposure to heat or moisture. With an older model, actual condition matters as much as the asking price.

Color codes help identify versions. The white, grey and black combination is associated with style code 942838-101, while other colorways use different numbers. The code on the inner label should match the photographs and description. Blurry images, a missing box or heavily worn rubber are reasons to examine the purchase carefully.

Original price and current value

The observed official price for the men’s version was $120, although Nike displayed it at $92.97 during a 22% discount. That figure belongs to the original sales channel and period, so it should not be treated as a guaranteed current price in any country.

Resale platforms show wide price differences. Used pairs can appear from around $30, while new examples, uncommon sizes or sought-after colors can exceed $150. Some listings go beyond $200, but an asking price does not prove that equivalent demand exists. The secondary market rewards rarity, not necessarily running performance.

Comparison with current shoes should be based on intended use. For a similar amount, buyers may find newer models with modern foams, greater protection and clearer purchase guarantees. The 2018 model remains interesting because of its design and distinctive ride, but paying a large premium only makes sense for someone specifically seeking those traits.

How it compares with newer Nike Free models

The Free family includes later versions such as the Free Run 5.0, Free RN 5.0 and recycled-material options. The name can suggest that they all offer the same experience, but each generation changes the geometry, knit, foam volume and sole flexibility.

The 2018 edition stands out for its Flyknit upper and close-to-foot fit. Later generations generally seek a more accessible balance between freedom and protection, although the exact feel depends on the last and version. A current Nike Free should not be treated as an identical replacement; its measurements and purpose must be checked.

Compared with a daily trainer, the structural difference is obvious. A traditional model usually provides more rubber, greater stability and a midsole prepared for many miles. The 2018 Free is more like a specialist tool: light and direct, but less forgiving when terrain, distance or fatigue complicate the stride.

An important piece in the evolution of natural running

The Nike Free RN Flyknit 2018 represents a period when the industry tried to bring running footwear closer to the sensation of moving with fewer restrictions. Its elastic knit, articulated sole and low weight summarize that search for a freer stride, while also showing its limits outside the context for which it was designed.

As a shoe for short outings, walking, travel or complementing a sports wardrobe, it retains a recognizable personality. It does not offer the protection of a modern high-mileage trainer and never aimed to do so. Its value lies in freedom of movement and low weight, not in absorbing endless mileage.

A decision to buy it today should consider three things: the condition of the pair, the available size and the intended use. A well-preserved example can still feel enjoyable for short sessions, but an apparently cheap deal makes little sense if the foam has hardened or the knit has stretched. The design remains appealing; the practical choice depends on whether its limits match the way the runner actually moves.