| Adidas Adizero Prime X 2 | Price | Release | Style | Retailer |
|---|---|---|---|---|
| cushioning & speed | $300 | Yes | HP9708 | adidas |
The Adidas Adizero Prime X 2 Strung is an exceptional and weighty all-in-one racer/trainer that excels in intervals, tempo runs, long distances, and races. Its toe-spring is impressively elevated, boasting a beneficial rocker that propels your speed forward.
The second version presents a broader foundation, enhancing overall stability. Additionally, the forefoot is now softer, offering increased stack height at the front, although this has resulted in a slight weight gain of 1.4 oz (40 g).
| The Pros | The Cons |
| More stable than previous versions | Less durable outsole |
| High level of speed assistance | Big weight increase |
| Slightly softer ride | Heavily overpriced |
| Deep cushioning | |
| Great grip |
Can you run a marathon with Adidas Prime X 2 Strung?
In spite of the advanced technology incorporated into it, the Prime X lacks the same level of assistance in transitioning and versatility. If you're hoping to compete in a race, the Adizero Prime X may not be the ideal choice due to its somewhat heavy weight and limited responsiveness. However, if you're seeking a shoe for quick, short-distance marathon training, it's definitely worth considering.
For runners who don't require support shoes, the Prime X allows for racking up miles without issue. Its rocker design provides exceptional energy return, while the cushioning ensures a comfortable experience throughout long distances.
Speaking from personal experience, even with numerous shoe options available in the market, I have made the decision to keep the Adizero Prime X as a go-to shoe for rotating in during training sessions, particularly on days focused on fast marathon training.
Consumer who should buy Adidas Adizero Prime X 2 Strung?
If you are currently in possession of the Adidas Adios Pro 3 and desire a shoe that offers increased cushioning and enhanced speed support, then the ideal choice for you would be the Prime X 2 Strung.
Consumer who should not buy Adidas Adizero Prime X 2 Strung?
Should you desire a racing shoe that offers a smooth and effortless ride, it is advisable to steer clear of the Prime X 2 Strung.
Introducing the Adidas Adizero Prime X 2 Strung
Adidas initially designed the Prime X as their marathon racing shoe; however, World Athletics' recent ruling against race-legalizing shoes with a stack height exceeding 50 mm necessitated the creation of the lower-stacked Adios Pro. Nonetheless, Adidas made the commendable decision to make the Prime X available to the general public.
I believe the Prime X is truly remarkable and captivating when it comes to running shoes. I have thoroughly enjoyed the previous two iterations. However, one aspect that I found unfavorable was their lack of stability, which can be attributed to the lofty stack height and the slender midfoot/rearfoot.
Additionally, they were noticeably bulkier compared to other racing shoes, although the added weight did not bother me.
Over the course of the previous year, I incorporated the Prime X Strung into my training routine for intervals, long runs, and tempo runs. I was particularly fond of its remarkable forefoot rocker and the ample cushioning it provided. Additionally, I found the shoe to be highly resilient due to its robust and thick outsole.
The Prime X 2, despite its name, is actually the third iteration of the Prime X. Last year's Prime X Strung, which served as the second version, maintained the same midsole and outsole as the original, but featured an enhanced upper. The Strung upper significantly improved comfort, albeit at a steep cost increase.
The latest iteration of the Prime X 2 tips the scales at 10.4 oz (295 g), boasting a weight gain of 1.4 oz (40 g) compared to its predecessor. While the heel stack height remains at 50 mm, the forefoot has been elevated by 3 mm, now standing at 43 mm. Additionally, the price tag remains at a steady $300.
Initial Thoughts on the Adidas Adizero Prime X 2 Strung
During my initial run, I engaged in a speed workout comprising of three sets of two kilometers. Right from the start, I sensed a distinct preference for this iteration of the Prime X, unlike its predecessors. The most prominent contrast was the heightened sense of stability. My landings felt securely grounded, and maneuvering around corners became remarkably effortless.
The speed at each interval was approximately 15 seconds per kilometer faster than my initial prediction, and the significant level of speed assistance that was present in previous versions remained unchanged.
Additionally, I noticed a slight increase in softness in the forefoot area, which can be attributed to the greater stack height.
During my initial run, I couldn't help but feel a tinge of disappointment as the anticipated "spring" in the forefoot, created by the plush Energy Core nestled between the two plates, failed to provide the expected boost. However, despite this setback, I remained enthused by the overall performance of the Prime X 2.
Adidas Adizero Prime X 2 Strung Upper
The Prime X 2 boasts a new and innovative design for its upper, featuring a semi bootie construction. This unique construction includes a knitted tongue that seamlessly connects to the rest of the upper. The upper is composed of numerous soft strands, fused together to create the Strung component. While I find this design to be incredibly comfortable, it does not offer the same level of breathability found in other racing shoes.
I have a preference for the previous year's upper as it provided superior foot lockdown. In contrast, the current version offers a more relaxed fit, thanks to the inclusion of a stretchy tongue. However, I do perceive a slight looseness in the heel area. Although there is no slippage, I am aware of the loose heel during each run.
Typically, when it comes to bootie uppers, it's not possible to tie a runner's knot. However, Adidas has ingeniously designed the Prime X 2 with two plastic attachments on the outer part of the upper, each equipped with two holes. This brilliant feature allows you to tie a runner's knot, ensuring a secure fit. It's essential for me to tie this knot to prevent the fit from being too loose.
The sizing of this year's version is truer to size compared to last year's model, with a snugger fit in the upper. However, I still suggest sticking to your usual size. The upper of the Prime X 2 remains one of the more spacious options for racing shoes, making it ideal for long runs and suitable for those with wider feet. Similar to its predecessors, the Prime X 2 lacks any reflective elements on its upper.
Adidas Adizero Prime X 2 Strung Sole Unit
Utilizing its 50 mm stack height to the fullest, the Prime X 2 employs an incredibly bold toe spring and rocker geometry that propels you forward at high speeds. By increasing the thickness of the midsole, the toe-spring can reach greater heights.
While propelling forward, one can shift their weight towards the front of the foot and activate the pronounced rocker feature. This particular characteristic is what contributes to the remarkable speed experienced while using the Prime X 2.
The enhanced stability of the Prime X 2 is what I find most appealing. This improvement is a result of incorporating an additional layer of foam beneath the arch, eliminating the previous cutout. Furthermore, the midfoot and rearfoot have been expanded compared to previous iterations, making it a more accommodating choice for those who strike with their heels and experience overpronation.
I've noticed that the Prime X 2 delivers superior performance compared to its predecessor when it comes to enduring long runs, thanks to its impeccable landings that provide a solid grip.
Additionally, the transition from EnergyRods to a conventional carbon plate enhances the shoe's stability, giving me a more confident stride.
Within the Prime X 2, there reside two distinct plates. The initial plate, located on the upper side, stretches across the entire length and is composed of carbon fibre. In contrast, the second plate, positioned underneath, covers three-quarters of the shoe's length and is infused with carbon. Nestled between these two plates lies the Energy Core, a pliable foam. Adidas claims that this core possesses greater energy rebound compared to the standard Lightstrike Pro foam, although personally, I cannot discern any discernible variance.
Within the Prime X 2, there reside two distinct plates. The initial plate, located on the upper side, stretches across the entire length and is composed of carbon fibre. In contrast, the second plate, positioned underneath, covers three-quarters of the shoe's length and is infused with carbon. Nestled between these two plates lies the Energy Core, a pliable foam. Adidas claims that this core possesses greater energy rebound compared to the standard Lightstrike Pro foam, although personally, I cannot discern any discernible variance.
The Prime X 2 boasts an exceptionally substantial midsole, housing two carbon plates within it. As a result, it stands as the most rigid shoe available, with its midsole exhibiting no flexibility whatsoever. This design choice enhances the rocker's performance significantly when compared to a racer featuring a more pliable plate.
Weighing in at 10.4 oz (295 g), the Prime X 2 surpasses all other super racers in terms of heaviness. However, the added weight doesn't bother me when it comes to short or medium distances. The advantage of the speed boost outweighs the sacrifice in weight.
During my time with the Prime X 2, I embarked on a 30-kilometer run at my desired marathon pace. In the initial two-thirds of the run, the weight of the shoes went unnoticed. However, as I reached the final 10 kilometers, fatigue started to set in, requiring me to muster all my strength to finish the workout. Nonetheless, the Prime X 2 proved to be exceptional for all my other running sessions, including hill sprints, easy runs, steady runs, and intervals.
The Prime X 2's outsole rubber has undergone a modification, adopting the same "sandpaper" texture as the Adios Pro's Continental rubber. This alteration ensures exceptional grip for the initial 150 km. However, beyond this point, the grip gradually diminishes. Additionally, the Continental rubber used in the Prime X 2 is notably thinner than the standard variant, resulting in a faster rate of wear down to the midsole foam.
Following the rainfall, the streets remained damp; however, the Prime X 2 exhibited remarkable traction with its outsole grip.
Summary
I've managed to cover more than 92 kilometers with the Prime X 2, surpassing the required 80 kilometers before writing my review. This clearly demonstrates my immense pleasure in running with these shoes.
While there are aspects of the new Prime X 2 that appeal to me, such as its broader foundation and more cushioned forefoot, there are also elements that fail to meet my expectations. Specifically, I am not fond of the looser upper, the added heaviness, and the reduction in thickness of the outsole rubber.
In my opinion, the latest version remains superior to its predecessor due to its enhanced user-friendliness. The need for meticulous landings is eliminated, as the shoe offers superior stability. Consequently, it caters to a broader spectrum of runners.
The Prime X 2 may be an enjoyable shoe, but it certainly doesn't justify its $300 price tag. For those who prioritize their budget (which applies to most runners), the Rocket X 2, Vaporfly 3, and Adios Pro 3, priced at $250, offer significantly more bang for your buck. This shoe serves as an additional option for runners who already possess a marathon racing shoe and desire a fresh alternative.
When it comes to performance, the Prime X 2 provides me with a greater boost in speed compared to any other running shoe currently available. This has led me to seriously contemplate using it for my upcoming marathon in just two weeks. However, my main concern about using the Prime X 2 for the race is its substantial weight, which exceeds the average marathon racing shoe by 3 ounces (85 grams).
In the span of a full marathon, the average runner takes around 40 000 steps. If I were to bear an additional 3 oz on each foot, throughout the duration of the race, I would be shouldering an additional 3402 kilograms on my feet. Whether the added weight will be counterbalanced by the extra speed boost remains uncertain.